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Liu J, Ding Y, Wang F, Ran J, Zhang H, Xie H, Pi Y, Ma L. Enhancing the supercapacitive performance of a carbon-based electrode through a balanced strategy for porous structure, graphitization degree and N,B co-doping. J Colloid Interface Sci 2024; 668:213-222. [PMID: 38677210 DOI: 10.1016/j.jcis.2024.04.154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 04/18/2024] [Accepted: 04/22/2024] [Indexed: 04/29/2024]
Abstract
Regarding carbon-based electrodes, simultaneously establishing a well-defined meso-porous architecture, introducing abundant hetero-atoms and improving the graphitization degree can effectively enhance their capacitive performance. However, it remains a significant challenge to achieve a good balance between defects and graphitization degree. In this study, the porous structure and composition of carbon materials are co-optimised through a 'dual-function' strategy. Briefly, K3Fe(C2O4)3 and H3BO3 were hybridised with a gelatin aqueous solution to form a homogeneous composite hydrogel, followed by lyophilisation and carbonisation. Owing to the dual functionality of raw materials, the graphitization, activation and hetero-atom doping processes can occur simultaneously during a one-step high-temperature treatment. The resultant carbon material exhibits a high graphitization degree (ID/IG = 0.9 ± 0.1), high hetero-atom content (N: 9.0 ± 0.3 at.%, B: 6.9 ± 0.5 at.%) and a large specific area (1754 ± 58 m2/g). The as-prepared electrode demonstrates a superior capacitance of 383 ± 1F g-1 at 1 A/g. Interestingly, the cyclic voltammetry (CV) curves exhibit a distinctive pair of broad redox peaks, which is uncommon in KOH electrolyte. Experiment data and density functional theory (DFT) simulation verify that N-5, B co-doping enhances the activity of the faradic reaction of carbon electrodes in KOH electrolyte. Furthermore, the fabricated Zn-ion hybrid supercapacitor (ZHSC) based on this carbon electrode delivers a high-energy density of 140.7 W h kg-1 at a power density of 840 W kg-1.
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Affiliation(s)
- Jin Liu
- Hubei Engineering & Technology Research Center for Functional Materials from Biomass, School of Chemistry and Material Science, Hubei Engineering University, Xiaogan, Hubei 432000, China
| | - Yu Ding
- Hubei Engineering & Technology Research Center for Functional Materials from Biomass, School of Chemistry and Material Science, Hubei Engineering University, Xiaogan, Hubei 432000, China
| | - Feng Wang
- Hubei Engineering & Technology Research Center for Functional Materials from Biomass, School of Chemistry and Material Science, Hubei Engineering University, Xiaogan, Hubei 432000, China
| | - Jiabing Ran
- College of Biological & Pharmaceutical Sciences, China Three Gorges University, Yichang 443002, China.
| | - Haining Zhang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
| | - Haijiao Xie
- Hangzhou Yanqu Information Technology Co., Ltd., Hangzhou 310003, China
| | - Yuqiang Pi
- Hubei Engineering & Technology Research Center for Functional Materials from Biomass, School of Chemistry and Material Science, Hubei Engineering University, Xiaogan, Hubei 432000, China
| | - Liya Ma
- Core Facility of Wuhan University, Wuhan University, Wuhan 430072, China.
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2
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Wang Q, He Q, Xiao B, Zhai D, Shen Y, Liu Y, Goddard WA. Detailed Reaction Kinetics for Hydrocarbon Fuels: The Development and Application of the ReaxFF CHO-S22 Force Field for C/H/O Systems with Enhanced Accuracy. J Phys Chem A 2024; 128:5065-5076. [PMID: 38870409 DOI: 10.1021/acs.jpca.4c01924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2024]
Abstract
Efficient and accurate reactive force fields (e.g., ReaxFF) are pivotal for large-scale atomistic simulations to comprehend microscopic combustion processes. ReaxFF has been extensively utilized to describe chemical reactions in condensed phases, but most existing ReaxFF models rely on quantum mechanical (QM) data nearly two decades old, particularly in hydrocarbon systems, constraining their accuracy and applicability. Addressing this gap, we introduce a reparametrized ReaxFFCHO-S22 for C/H/O systems, tailored for studying the pyrolysis and combustion of hydrocarbon fuel. Our approach involves high-level QM benchmarks and large database construction for C/H/O systems, global ReaxFF parameter optimization, and molecular dynamics simulations of typical hydrocarbon fuels. Density functional theory (DFT) computations utilized the M06-2X functional at the meta-generalized gradient approximation (meta-GGA) level with a large basis set (6-311++G**). Our new ReaxFFCHO-S22 model exhibits a minimum 10% enhancement in accuracy compared to the previous ReaxFF models for a large variety of hydrocarbon molecules. This advanced ReaxFFCHO-S22 not only enables efficient large-scale studies on the microscopic chemical reactions of more complex hydrocarbon fuel but also can extend to biofuels, energetic materials, polymers, and other pertinent systems, thus serving as a valuable tool for studying chemical reaction dynamics of the large-scale hydrocarbon condensed phase at an atomistic level.
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Affiliation(s)
- Qingqing Wang
- Materials Genome Institute, Shanghai Engineering Research Center for Integrated Circuits and Advanced Display Materials, Shanghai University, Shanghai 200444, China
| | - Qi He
- Materials Genome Institute, Shanghai Engineering Research Center for Integrated Circuits and Advanced Display Materials, Shanghai University, Shanghai 200444, China
| | - Bin Xiao
- Materials Genome Institute, Shanghai Engineering Research Center for Integrated Circuits and Advanced Display Materials, Shanghai University, Shanghai 200444, China
| | - Dong Zhai
- Materials Genome Institute, Shanghai Engineering Research Center for Integrated Circuits and Advanced Display Materials, Shanghai University, Shanghai 200444, China
| | - Yiheng Shen
- Materials Genome Institute, Shanghai Engineering Research Center for Integrated Circuits and Advanced Display Materials, Shanghai University, Shanghai 200444, China
| | - Yi Liu
- Materials Genome Institute, Shanghai Engineering Research Center for Integrated Circuits and Advanced Display Materials, Shanghai University, Shanghai 200444, China
- Materials and Process Simulation Center (MSC), California Institute of Technology, Pasadena, California 91125, United States
| | - William A Goddard
- Materials and Process Simulation Center (MSC), California Institute of Technology, Pasadena, California 91125, United States
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3
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Pinto AV, Ferreira P, Cunha AV, Havenith RWA, Magalhães AL, Ramos MJ, Fernandes PA. Revisiting the reaction pathways for phospholipid hydrolysis catalyzed by phospholipase A2 with QM/MM methods. Chem Sci 2024; 15:9793-9805. [PMID: 38939148 PMCID: PMC11206408 DOI: 10.1039/d4sc02315c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Accepted: 05/17/2024] [Indexed: 06/29/2024] Open
Abstract
Secreted phospholipase A2 (sPLA2) is a Ca2+-dependent, widely distributed enzyme superfamily in almost all mammalian tissues and bacteria. It is also a critical component of the venom of nearly all snakes, as well as many invertebrate species. In non-venomous contexts, sPLA2 assumes significance in cellular signaling pathways by binding cell membranes and catalyzing ester bond hydrolysis at the sn-2 position of phospholipids. Elevated levels of GIIA sPLA2 have been detected in the synovial fluid of arthritis patients, where it exhibits a pro-inflammatory function. Consequently, identifying sPLA2 inhibitors holds promise for creating highly effective pharmaceutical treatments. Beyond arthritis, the similarities among GIIA sPLA2s offer an opportunity for developing treatments against snakebite envenoming, the deadliest neglected tropical disease. Despite decades of study, the details of PLA2 membrane-binding, substrate-binding, and reaction mechanism remain elusive, demanding a comprehensive understanding of the sPLA2 catalytic mechanism. This study explores two reaction mechanism hypotheses, involving one or two water molecules, and distinct roles for the Ca2+ cofactor. Our research focuses on the human synovial sPLA2 enzyme bound to lipid bilayers of varying phospholipid compositions, and employing adiabatic QM/MM and QM/MM MD umbrella sampling methods to energetically and geometrically characterize the structures found along both reaction pathways. Our studies demonstrate the higher frequency of productive conformations within the single-water pathway, also revealing a lower free energy barrier for hydrolyzing POPC. Furthermore, we observe that the TS of this concerted one-step reaction closely resembles transition state geometries observed in X-ray crystallography complexes featuring high-affinity transition state analogue inhibitors.
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Affiliation(s)
- Alexandre V Pinto
- LAQV/Requimte, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto Rua do Campo Alegre, s/n 4169-007 Porto Portugal
| | - Pedro Ferreira
- LAQV/Requimte, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto Rua do Campo Alegre, s/n 4169-007 Porto Portugal
| | - Ana V Cunha
- MolSpec, Departement Chemie, Universiteit Antwerpen Groenenborgerlaan 171 2020 Antwerpen Belgium
| | - Remco W A Havenith
- Stratingh Institute for Chemistry and Zernike Institute for Advanced Materials, Rijksuniversiteit Groningen Nijenborgh 4 9747 AG Groningen Netherlands
- The Netherlands and Ghent Quantum Chemistry Group, Department of Chemistry, Ghent University Krijgslaan 281 (S3) B-9000 Gent Belgium
| | - Alexandre L Magalhães
- LAQV/Requimte, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto Rua do Campo Alegre, s/n 4169-007 Porto Portugal
| | - Maria J Ramos
- LAQV/Requimte, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto Rua do Campo Alegre, s/n 4169-007 Porto Portugal
| | - Pedro A Fernandes
- LAQV/Requimte, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto Rua do Campo Alegre, s/n 4169-007 Porto Portugal
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Cheng Z, Bi H, Liu S, Chen J, Misquitta AJ, Yu K. Developing a Differentiable Long-Range Force Field for Proteins with E(3) Neural Network-Predicted Asymptotic Parameters. J Chem Theory Comput 2024. [PMID: 38888427 DOI: 10.1021/acs.jctc.4c00337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/20/2024]
Abstract
Accurately describing long-range interactions is a significant challenge in molecular dynamics (MD) simulations of proteins. High-quality long-range potential is also an important component of the range-separated machine learning force field. This study introduces a comprehensive asymptotic parameter database encompassing atomic multipole moments, polarizabilities, and dispersion coefficients. Leveraging active learning, our database comprehensively represents protein fragments with up to 8 heavy atoms, capturing their conformational diversity with merely 78,000 data points. Additionally, the E(3) neural network (E3NN) is employed to predict the asymptotic parameters directly from the local geometry. The E3NN models demonstrate exceptional accuracy and transferability across all asymptotic parameters, achieving an R2 of 0.999 for both protein fragments and 20 amino acid dipeptide test sets. The long-range electrostatic and dispersion energies can be obtained using the E3NN-predicted parameters, with an error of 0.07 and 0.02 kcal/mol, respectively, when compared to symmetry-adapted perturbation theory (SAPT). Therefore, our force fields demonstrate the capability to accurately describe long-range interactions in proteins, paving the way for next-generation protein force fields.
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Affiliation(s)
- Zheng Cheng
- School of Mathematical Sciences, Peking University, Beijing 100871, China
- AI for Science Institute, Beijing 100084, P. R. China
| | - Hangrui Bi
- School of Mathematical Sciences, Peking University, Beijing 100871, China
- DP Technology, Beijing 100080, P. R. China
| | - Siyuan Liu
- DP Technology, Beijing 100080, P. R. China
| | - Junmin Chen
- Tsinghua-Berkeley Shenzhen Institute, Shenzhen 518055, Guangdong, P. R. China
- Tsinghua Shenzhen International Graduate School, Shenzhen 518055, Guangdong, P. R. China
| | - Alston J Misquitta
- School of Physics and Astronomy, Queen Mary, University of London, London E1 4NS, U.K
| | - Kuang Yu
- Tsinghua-Berkeley Shenzhen Institute, Shenzhen 518055, Guangdong, P. R. China
- Tsinghua Shenzhen International Graduate School, Shenzhen 518055, Guangdong, P. R. China
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5
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Liu X, Tian S, Guo W, Li H, Pang B, Wu Y. Competing C and N as Reactive Centers for Microsolvated Ambident Nucleophiles CN -(H 2O) n=0-3: A Theoretical Study of E2/S N2 Reactions with CH 3CH 2X (X = Cl, Br, I). J Phys Chem A 2024; 128:4651-4662. [PMID: 38819200 DOI: 10.1021/acs.jpca.4c01226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2024]
Abstract
As an ambident nucleophile, CN- has both C and N atoms that can act as the reactive center to facilitate substitution reactions. We investigate in detail the potential energy profiles of CN-(H2O)0-3 with CH3CH2X (X = Cl, Br, I) to explore the influence of solvent molecules on competition between the different nucleophilic atoms C and N involving the SN2 and E2 pathways. The energy barrier sequence for the transition states follows C@inv-SN2 < N@inv-SN2 < C@anti-E2 < N@anti-E2. When two different atoms act as nucleophilic atoms, the SN2 reaction is always preferred over the E2 reaction, and this preference increases with microsolvation. For the ambident nucleophiles CN-(H2O)0-3, C as the reactive center always has stronger nucleophilicity and basicity than N acting as the reactive center. Regarding the leaving group, the height of the energy barrier is positively correlated with the acidity of the CH3CH2X substrate for the E2 pathway and with X-heterolysis for the SN2 pathway. Furthermore, we found that in the gas phase, the energy barrier for different leaving group systems decreases gradually in the order Cl > Br > I, while in the SMD solution, the energy barrier and product energy increase slightly in the system from X = Cl to Br; this change may be due to the significantly weakened transition-state interaction for the X = Br system. Our activation strain, quantitative molecular orbital, and charge analyses reveal the physical mechanisms underlying the various computed trends. In addition, we also demonstrate the two points recently proposed by Vermeeren, P. . Chem. Eur. J. 2020, 26, 15538-15548.
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Affiliation(s)
- Xu Liu
- College of Chemistry, Liaoning University, Shenyang 110036, China
| | - Shiqi Tian
- College of Chemistry, Liaoning University, Shenyang 110036, China
| | - Wenyu Guo
- College of Chemistry, Liaoning University, Shenyang 110036, China
| | - Hui Li
- College of Chemistry, Liaoning University, Shenyang 110036, China
| | - Boxue Pang
- Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China
| | - Yang Wu
- College of Chemistry, Liaoning University, Shenyang 110036, China
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Zhang W, Huang HH, Luo ZM, Ma F, Gonell S, Ke Z, Tan L, Wang JW. Unveiling the Activity and Mechanism Alterations by Pyrene Decoration on a Co(II) Macrocyclic Catalyst for CO 2 Reduction. CHEMSUSCHEM 2024; 17:e202301113. [PMID: 38287461 DOI: 10.1002/cssc.202301113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 01/04/2024] [Accepted: 01/29/2024] [Indexed: 01/31/2024]
Abstract
Mechanistic studies involving characterization of crucial intermediates are desirable for rational optimization of molecular catalysts toward CO2 reduction, while fundamental challenges are associated with such studies. Herein we present the systematic mechanistic investigations on a pyrene-appended CoII macrocyclic catalyst in comparison with its pyrene-free prototype. The comparative results also verify the reasons of the higher catalytic activity of the pyrene-tethered catalyst in noble-metal-free CO2 photoreduction with various photosensitizers, where a remarkable apparent quantum yield of 36±3 % at 425 nm can be obtained for selective CO production. Electrochemical and spectroelectrochemical studies in conjunction with DFT calculations between the two catalysts have characterized the key CO-bound intermediates and revealed their different CO-binding behavior, demonstrating that the pyrene group endows the corresponding CoII catalyst a lower catalytic potential, a higher stability, and a greater ease in CO release, all of which contribute to its better performance.
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Affiliation(s)
- Weilu Zhang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, China
| | - Hai-Hua Huang
- School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China
| | - Zhi-Mei Luo
- School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, China
| | - Fan Ma
- School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, China
| | - Sergio Gonell
- Institute of Advanced Materials (INAM), Universitat Jaume I, Av. Vicente Sos Baynat s/n., Castelló, 12006, Spain
| | - Zhuofeng Ke
- School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China
| | - Liang Tan
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, China
| | - Jia-Wei Wang
- School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, China
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Tendongmo H, Kogge BF, Tamafo Fouegue AD, Tasheh SN, Tessa CBN, Ghogomu JN. Theoretical screening of N-[5'-methyl-3'-isoxasolyl]-N-[(E)-1-(-2-thiophene)] methylidene]amine and its isoxazole based derivatives as donor materials for bulk heterojunction organic solar cells: DFT and TD-DFT investigation. J Mol Model 2024; 30:176. [PMID: 38773049 DOI: 10.1007/s00894-024-05978-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Accepted: 05/15/2024] [Indexed: 05/23/2024]
Abstract
CONTEXT In the present work, the influence of aromatic ring substitution on a series of small-donor organic molecules (A, B, C, D, and E) with isoxazole cores was investigated for photovoltaic applications in organic solar cells. Frontier molecular orbital analysis, chemical reactivity descriptors, dipole moment, and population analysis showed that all the organic materials have intramolecular charge transfer abilities capable of donating electrons to the acceptor material (PCBM). The required photovoltaic parameters such as Voc, FF, Jsc, LHE, and other associated optoelectronic parameters are reported. The results demonstrate that aromatic ring substitution influences charge transfer and power conversion efficiencies of solar cells. That is, an increase in the aromatic character of a material increases its charge transfer, and as a result, its photovoltaic properties are increased. Additionally, all the investigated derivatives are good charge transporters with suitable electron reorganization energies, which are beneficial for minimizing energy loss. Hence, these organic derivatives with isoxazole backbones are promising materials and may provide fresh insights into the design of new materials for organic solar cell applications. METHOD All calculations were performed using DFT and the ORCA 4.1.0 program package as the main tool for geometry optimization and frequency calculations. The Avogadro 1.2.1 visualization tool was used to prepare all input files executed by ORCA 4.1.0. The BP86, B3LYP, and wB97M series of functionals coupled with the def2/TZVP basis set were employed for geometry optimization. All energy-related calculations were carried out using the M06-2x functional. Multiwfn version 3.7 was used for aromaticity and population analysis. Excited state and UV-visible spectra were simulated using the TD-DFT method at the CAM-B3LYP-D3, wB97X-D3, and PBE0-D3 coupled with the ma-def2-TZVP basis set. Moreover, solvent effects were incorporated using the SMD scheme as incorporated in the ORCA software. Lastly, the RIJCOSX approximations were used to speed up calculations while maintaining accuracy.
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Affiliation(s)
- Hilaire Tendongmo
- Department of Chemistry, Faculty of Science, University of Dschang, Research Unit of Noxious Chemistry and Environmental Engineering, P.O. Box 67, Dschang, Cameroon
| | - Bine Fritzgerald Kogge
- Department of Fundamental and Transversal Sciences, National Advanced School of Public Works, P.O. Box 510, Yaounde, Cameroon
| | - Aymard Didier Tamafo Fouegue
- Department of Chemistry, Higher Teacher Training College, The University of Bertoua, P.O. Box 652, Bertoua, Cameroon.
| | | | - Charles Bernard Nwamba Tessa
- Department of Chemistry, Faculty of Science, University of Dschang, Research Unit of Noxious Chemistry and Environmental Engineering, P.O. Box 67, Dschang, Cameroon
| | - Julius Numbonui Ghogomu
- Department of Chemistry, Faculty of Science, University of Dschang, Research Unit of Noxious Chemistry and Environmental Engineering, P.O. Box 67, Dschang, Cameroon.
- Department of Chemistry, The University of Bamenda, P.O. Box 39, Bambili, Bamenda, Cameroon.
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Lu T. Theoretical Prediction and Comprehensive Characterization of an All-Nitrogenatomic Ring, Cyclo[18]Nitrogen (N 18). Chemphyschem 2024:e202400377. [PMID: 38722092 DOI: 10.1002/cphc.202400377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 05/07/2024] [Indexed: 06/20/2024]
Abstract
The cyclic molecule cyclo[18]carbon composed of 18 carbon atoms has been observed in condensed phase experiment in recent years and has attracted great attention. Through state-of-art quantum chemistry calculation, this study found that 18 nitrogen atoms can also form a macrocyclic system, cyclo[18]nitrogen (N18), though its lifetime is very short at room temperature and can only exist for a relatively long time at very low temperatures. We comprehensively theoretically studied properties of N18, including geometric configurations, thermal decomposition mechanism and rate, molecular dynamics behavior, energetic properties, vibrational and electronic spectra. We also discussed in depth the electronic structure of N18, including nature of the N-N bonds, lone-pairs, charge distribution characteristics, electronic delocalization, and aromaticity. This work is not only the first exploration of the macrocyclic N18 molecule, but also the first time to systematically examine a very long-chain substance fully composed of nitrogen atoms in isolated state.
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Affiliation(s)
- Tian Lu
- Beijing Kein Research Center for Natural Sciences, Beijing, 100024, P. R. China
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Chen J, Liao R, Sai L, Zhao J, Wu X. B 63: The Most Stable Bilayer Structure with Dual Aromaticity. J Phys Chem Lett 2024; 15:4167-4174. [PMID: 38597579 DOI: 10.1021/acs.jpclett.4c00566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
The emergence of a bilayer B48 cluster, which has been both theoretically predicted and experimentally observed, as well as the recent experimental synthesis of bilayer borophene sheets on Ag and Cu surfaces, has generated tremendous curiosity in the bilayer structures of boron clusters. However, the connection between bilayer boron cluster and bilayer borophene remains unknown. By combining a genetic algorithm and density functional theory calculations, a global search for the low-energy structures of the B63 cluster was conducted, revealing that the Cs bilayer structure with three interlayer B-B bonds is the most stable bilayer structure. This structure was further examined in terms of its structural stability, chemical bonding, and aromaticity. Interestingly, the interlayer bonds induce strong electronegativity and robust aromaticity. Furthermore, the dual aromaticity stems from diatropic currents originating from virtual translational transitions for both σ and π electrons. This unprecedent bilayer boron cluster is anticipated to enrich the concept of dual aromaticity and serve as a potential precursor for bilayer borophene.
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Affiliation(s)
- Jinhuang Chen
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China
| | - Rui Liao
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China
| | - Linwei Sai
- School of Science, Hohai University, Changzhou 213022, China
| | - Jijun Zhao
- Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter, Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, School of Physics, South China Normal University, Guangzhou 510006, China
| | - Xue Wu
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China
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Xie L, Zhou W, Huang Y, Qu Z, Li L, Yang C, Ding Y, Li J, Meng X, Sun F, Gao J, Zhao G, Qin Y. Elucidating the impact of oxygen functional groups on the catalytic activity of M-N 4-C catalysts for the oxygen reduction reaction: a density functional theory and machine learning approach. MATERIALS HORIZONS 2024; 11:1719-1731. [PMID: 38277153 DOI: 10.1039/d3mh02115g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2024]
Abstract
Efforts to enhance the efficiency of electrocatalysts for the oxygen reduction reaction (ORR) in energy conversion and storage devices present formidable challenges. In this endeavor, M-N4-C single-atom catalysts (MN4) have emerged as promising candidates due to their precise atomic structure and adaptable electronic properties. However, MN4 catalysts inherently introduce oxygen functional groups (OGs), intricately influencing the catalytic process and complicating the identification of active sites. This study employs advanced density functional theory (DFT) calculations to investigate the profound influence of OGs on ORR catalysis within MN4 catalysts (referred to as OGs@MN4, where M represents Fe or Co). We established the following activity order for the 2eORR: for OGs@CoN4: OH@CoN4 > CoN4 > CHO@CoN4 > C-O-C@CoN4 > COC@CoN4 > COOH@CoN4 > CO@CoN4; for OGs@FeN4: COC@FeN4 > CO@FeN4 > OH@FeN4 > FeN4 > COOH@FeN4 > CHO@FeN4 > C-O-C@FeN4. Multiple oxygen combinations were constructed and found to be the true origin of MN4 activity (for instance, the overpotential of 2OH@CoN4 as low as 0.07 V). Furthermore, we explored the performance of the OGs@MN4 system through charge and d-band center analysis, revealing the limitations of previous electron-withdrawing/donating strategies. Machine learning analysis, including GBR, GPR, and LINER models, effectively guides the prediction of catalyst performance (with an R2 value of 0.93 for predicting ΔG*OOH_vac in the GBR model). The Eg descriptor was identified as the primary factor characterizing ΔG*OOH_vac (accounting for 62.8%; OGs@CoN4: R2 = 0.9077, OGs@FeN4: R2 = 0.7781). This study unveils the significant impact of OGs on MN4 catalysts and pioneers design and synthesis criteria rooted in Eg. These innovative findings provide valuable insights into understanding the origins of catalytic activity and guiding the design of carbon-based single-atom catalysts, appealing to a broad audience interested in energy conversion technologies and materials science.
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Affiliation(s)
- Liang Xie
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
| | - Wei Zhou
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, P. R. China.
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
| | - Yuming Huang
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
| | - Zhibin Qu
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
| | - Longhao Li
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
| | - Chaowei Yang
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
| | - Yani Ding
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
| | - Junfeng Li
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
| | - Xiaoxiao Meng
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
| | - Fei Sun
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
| | - Jihui Gao
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
| | - Guangbo Zhao
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
| | - Yukun Qin
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
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Miao L, Jia W, Cao X, Jiao L. Computational chemistry for water-splitting electrocatalysis. Chem Soc Rev 2024; 53:2771-2807. [PMID: 38344774 DOI: 10.1039/d2cs01068b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
Electrocatalytic water splitting driven by renewable electricity has attracted great interest in recent years for producing hydrogen with high-purity. However, the practical applications of this technology are limited by the development of electrocatalysts with high activity, low cost, and long durability. In the search for new electrocatalysts, computational chemistry has made outstanding contributions by providing fundamental laws that govern the electron behavior and enabling predictions of electrocatalyst performance. This review delves into theoretical studies on electrochemical water-splitting processes. Firstly, we introduce the fundamentals of electrochemical water electrolysis and subsequently discuss the current advancements in computational methods and models for electrocatalytic water splitting. Additionally, a comprehensive overview of benchmark descriptors is provided to aid in understanding intrinsic catalytic performance for water-splitting electrocatalysts. Finally, we critically evaluate the remaining challenges within this field.
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Affiliation(s)
- Licheng Miao
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Wenqi Jia
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Xuejie Cao
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Lifang Jiao
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University, Tianjin 300071, China.
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12
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Zheng W, Wang Y, Chen F, Bai B, Wang H, Li M. Solvatochromic and Proton-Responsive characteristics of Bi-1,3,4-Oxadiazole derivatives with symmetric dimethylamino substitution. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 308:123800. [PMID: 38145583 DOI: 10.1016/j.saa.2023.123800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 12/10/2023] [Accepted: 12/18/2023] [Indexed: 12/27/2023]
Abstract
D-A molecules find extensive use in intelligent stimulus-response systems due to their exceptional attributes, including high sensitivity, rapid response, wide compatibility, and structural adaptability. The strength of Intramolecular Charge Transfer (ICT) plays a pivotal role in determining the performance of these devices. To enhance the ICT strength and explore new applications for D-A molecules, we meticulously designed a pair of symmetric dimethylamino-substituted bi-1,3,4-oxadiazole derivatives (DMAOXD and DMAOXDBEN). These symmetric D-A-A-D molecules, with strong electron donor terminals, displayed a modest redshift of less than 25 nm in the UV-vis absorption spectra. However, there was a significant redshift in the emission spectra (140 nm for DMAOXD and 170 nm for DMAOXDBEN) when transitioning from cyclohexane to dimethyl sulfoxide, indicating a pronounced ICT characteristic. Theoretical calculations support the idea that the dimethylaminophenyl unit serves as an electron donor in both DMAOXD and DMAOXDBEN, while the 1,3,4-oxadiazole and central benzene ring act as acceptors. The pronounced ICT characteristic observed in DMAOXD and DMAOXDBEN can be attributed to long-distance electron transfer. Additionally, it's noteworthy that the emission of DMAOXD and DMAOXDBEN solution samples can be quenched by adding trifluoroacetic acid (TFA) and restored by the addition of triethylamine (TEA). Inspired by this, a pattern created with ink samples containing DMAOXD and DMAOXDBEN can be concealed through fumigation with TFA and subsequently revealed by treating them with TEA, suggesting their potential use in data encryption.
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Affiliation(s)
- Weitao Zheng
- Key Laboratory of Automobile Materials (MOE), College of Materials Science and Engineering, Jilin University, Changchun 130012, China
| | - Yuhan Wang
- Key Laboratory of Automobile Materials (MOE), College of Materials Science and Engineering, Jilin University, Changchun 130012, China
| | - Fangyi Chen
- Chongqing College of Electronic Engineering, No.76 University Town East Road, Shapingba District, Chongqing 401331, China
| | - Binglian Bai
- College of Physics, Jilin University, Changchun 130012, China
| | - Haitao Wang
- Key Laboratory of Automobile Materials (MOE), College of Materials Science and Engineering, Jilin University, Changchun 130012, China.
| | - Min Li
- Key Laboratory of Automobile Materials (MOE), College of Materials Science and Engineering, Jilin University, Changchun 130012, China.
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13
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Mohapatra S, Xian JLL, Galvez-Rodriguez A, Ekande OS, Drewes JE, Gin KYH. Photochemical fate of quaternary ammonium compounds (QACs) and degradation pathways predication through computational analysis. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133483. [PMID: 38232547 DOI: 10.1016/j.jhazmat.2024.133483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 11/30/2023] [Accepted: 01/08/2024] [Indexed: 01/19/2024]
Abstract
Quaternary ammonium compounds (QACs) are commonly used in many products, such as disinfectants, detergents and personal care products. However, their widespread use has led to their ubiquitous presence in the environment, posing a potential risk to human and environmental health. Several methods, including direct and indirect photodegradation, have been explored to remove QACs such as benzylalkyldimethyl ammonium compounds (BACs) and alkyltrimethyl ammonium compounds (ATMACs) from the environment. Hence, in this research, a systematic review of the literature was conducted using PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analysis) method to understand the fate of these QACs during direct and indirect photodegradation in UV/H2O2, UV/PS, UV/PS/Cu2+, UV/chlorine, VUV/UV/chlorine, O3/UV and UV/O3/TiO2 systems which produce highly reactive radicals that rapidly react with the QACs, leading to their degradation. As a result of photodegradation, several transformation products (TPs) of QACs are formed, which can pose a greater risk to the environment and human health than the parent QACs. Only limited research in this area has been conducted with fewer QACs. Hence, quantum mechanical calculations such as density functional theory (DFT)-based computational calculations using Gaussian09 software package were used here to explain better the photo-resistant nature of a specific type of QACs, such as BACs C12-18 and ATMACs C12, C14, C18, and their transformation pathways, providing insights into active sites participating in the phototransformation. Recognizing that different advanced oxidation processes (AOPs) come with pros and cons in the elimination of QACs, this review also highlighted the importance of implementing each AOP concerning the formation of toxic transformation products and electrical energy per order (EEO), especially when QACs coexist with other emerging contaminants (ECs).
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Affiliation(s)
- Sanjeeb Mohapatra
- NUS Environmental Research Institute, National University of Singapore, T-Lab Building, 5A Engineering Drive 1, 117411, Singapore; Energy and Environmental Sustainability for Megacities (E2S2) Phase II, Campus for Research Excellence and Technological Enterprise (CREATE), 1 CREATE Way, 138602, Singapore; Department of Water Management, Faculty of Civil Engineering and Geosciences, Delft University of Technology, P.O Box 5048, 2600 GA Delft, the Netherlands
| | - Jovina Lew Li Xian
- NUS Environmental Research Institute, National University of Singapore, T-Lab Building, 5A Engineering Drive 1, 117411, Singapore
| | | | - Onkar Sudhir Ekande
- Environmental Engineering Division, Department of Civil Engineering, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - Jörg E Drewes
- Chair of Urban Water Systems Engineering, Technical University of Munich, 85748 Garching, Germany
| | - Karina Yew-Hoong Gin
- NUS Environmental Research Institute, National University of Singapore, T-Lab Building, 5A Engineering Drive 1, 117411, Singapore; Energy and Environmental Sustainability for Megacities (E2S2) Phase II, Campus for Research Excellence and Technological Enterprise (CREATE), 1 CREATE Way, 138602, Singapore; Department of Civil & Environmental Engineering, National University of Singapore, Engineering Drive 2, 117576, Singapore.
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14
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Wang Z, Liu X, Zhang X, Zhang H, Zhao Y, Li Y, Yu H, He G. Realizing one-step two-electron transfer of naphthalene diimides via a regional charge buffering strategy for aqueous organic redox flow batteries. MATERIALS HORIZONS 2024; 11:1283-1293. [PMID: 38165892 DOI: 10.1039/d3mh01485a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2024]
Abstract
Naphthalene diimide derivatives show great potential for application in neutral aqueous organic redox flow batteries (AORFBs) due to their highly conjugated molecular structure and stable two-electron storage capacity. However, the two-electron redox process of naphthalene diimides typically occurs via two separate steps with the transfer of one electron per step ("two-step two-electron" transfer process), which leads to an inevitable loss of voltage and energy. Herein, we report a novel regional charge buffering strategy that utilizes the core-substituted electron-donating group to adjust the redox properties of naphthalene diimides, realizing two electron transfer via a single-step redox process ("one-step two-electron" transfer process). The symmetrical battery testing of NDI-DEtOH revealed exceptional intrinsic stability lasting for 11 days with a daily decay rate of only 0.11%. Meanwhile, AORFBs with NDI-DMe/FcNCl and NDI-DEtOH/FcNCl exhibited a remarkable 40% improvement in peak power density at 50% state of charge (SOC) in comparison to NDI/FcNCl-based AORFBs. In addition, the battery's energy efficiency has increased by 24%, resulting in much more stable output power and significantly improved energy efficiency. These results are of great significance to practical applications of AORFBs.
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Affiliation(s)
- Zengrong Wang
- Frontier Institute of Science and Technology, Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054, China.
| | - Xu Liu
- Frontier Institute of Science and Technology, Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054, China.
| | - Xuri Zhang
- Frontier Institute of Science and Technology, Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054, China.
| | - Heng Zhang
- Frontier Institute of Science and Technology, Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054, China.
| | - Yujie Zhao
- Frontier Institute of Science and Technology, Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054, China.
| | - Yawen Li
- Frontier Institute of Science and Technology, Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054, China.
| | - Haiyan Yu
- Frontier Institute of Science and Technology, Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054, China.
| | - Gang He
- Frontier Institute of Science and Technology, Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054, China.
- Xi'an Key Laboratory of Electronic Devices and Material Chemistry, Engineering Research Center of Key Materials for Efficient Utilization of Clean Energy of Shaanxi Province, China
- Future Industrial Innovation Institute of Emerging Information Storage and Smart Sensor, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054, China
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15
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Ernst MJ, Abdulkader A, Hagenbach A, Claude G, Roca Jungfer M, Abram U. [Tc(NO)(Cp)(PPh 3)Cl] and [Tc(NO)(Cp)(PPh 3)(NCCH 3)](PF 6), and Their Reactions with Pyridine and Chalcogen Donors. Molecules 2024; 29:1114. [PMID: 38474627 DOI: 10.3390/molecules29051114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 02/25/2024] [Accepted: 02/27/2024] [Indexed: 03/14/2024] Open
Abstract
Reactions of the technetium(I) nitrosyl complex [Tc(NO)(Cp)(PPh3)Cl] with triphenylphosphine chalcogenides EPPh3 (E = O, S, Se), and Ag(PF6) in a CH2Cl2/MeOH mixture (v/v, 2/1) result in an exchange of the chlorido ligand and the formation of [Tc(NO)(Cp)(PPh3)(EPPh3)](PF6) compounds. The cationic acetonitrile complex [Tc(NO)(Cp)(PPh3)(NCCH3)]+ is formed when the reaction is conducted in NCCH3 without additional ligands. During the isolation of the corresponding PF6- salt a gradual decomposition of the anion was detected in the solvent mixture applied. The yields and the purity of the product increase when the BF4- salt is used instead. The acetonitrile ligand is bound remarkably strongly to technetium and exchange reactions readily proceed only with strong donors, such as pyridine or ligands with 'soft' donor atoms, such as the thioether thioxane. Substitutions on the cyclopentadienyl ring do not significantly influence the ligand exchange behavior of the starting material. 99Tc NMR spectroscopy is a valuable tool for the evaluation of reactions of the complexes of the present study. The extremely large chemical shift range of this method allows the ready detection of corresponding ligand exchange reactions. The observed 99Tc chemical shifts depend on the donor properties of the ligands. DFT calculations support the discussions about the experimental results and provide explanations for some of the unusual findings.
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Affiliation(s)
- Moritz Johannes Ernst
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, D-14195 Berlin, Germany
| | - Abdullah Abdulkader
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, D-14195 Berlin, Germany
| | - Adelheid Hagenbach
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, D-14195 Berlin, Germany
| | - Guilhem Claude
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, D-14195 Berlin, Germany
| | | | - Ulrich Abram
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, D-14195 Berlin, Germany
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16
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Li X, Feng A, Zu Y, Liu P. Unraveling Meso-Substituent Steric Effects on the Mechanism of Hydrogen Evolution Reaction in Ni II Porphyrin Hydrides Using DFT Method. Molecules 2024; 29:986. [PMID: 38474498 DOI: 10.3390/molecules29050986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 02/13/2024] [Accepted: 02/13/2024] [Indexed: 03/14/2024] Open
Abstract
Substituents at the meso-site of metalloporphyrins profoundly influence the hydrogen evolution reaction (HER) mechanism. This study employs density functional theory (DFT) to computationally analyze NiII-porphyrin and its hydrides derived from tetrakis(pentafluorophenyl)porphyrin molecules, presenting stereoisomers in ortho- or para-positions. The results reveal that the spatial resistance effect of meso-substituted groups at the ortho- and para-positions induces significant changes in Ni-N bond lengths, angles, and reaction dynamics. For ortho-position substituents forming complex I, a favorable 88.88 ų spherical space was created, facilitating proton coordination and the formation of H2 molecules; conversely, para-position substituents forming complex II impeded H2 formation until bimolecular complexes arose. Molecular dynamics (MD) analysis and comparison were conducted on the intermediation products of I-H2 and (II-H)2, focusing on the configuration and energy changes. In the I-H2 products, H2 molecules underwent separation after 150 fs and overcame the 2.2 eV energy barrier. Subsequently, significant alterations in the spatial structure were observed as complex I deformed. In the case of (II-H)2, it was influenced by the distinctive "sandwich" configuration; the spatial structure necessitated overcoming a 6.7 eV energy barrier for H2 detachment and a process observed after 2400 fs.
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Affiliation(s)
- Xiaodong Li
- Institute of Physics & Optoelectronics Technology, Baoji University of Arts and Sciences, Baoji 721016, China
| | - Ailing Feng
- Institute of Physics & Optoelectronics Technology, Baoji University of Arts and Sciences, Baoji 721016, China
| | - Yanqing Zu
- Institute of Physics & Optoelectronics Technology, Baoji University of Arts and Sciences, Baoji 721016, China
| | - Peitao Liu
- Institute of Physics & Optoelectronics Technology, Baoji University of Arts and Sciences, Baoji 721016, China
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17
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Al-Matarneh CM, Pinteala M, Nicolescu A, Silion M, Mocci F, Puf R, Angeli A, Ferraroni M, Supuran CT, Zara S, Carradori S, Paoletti N, Bonardi A, Gratteri P. Synthetic Approaches to Novel Human Carbonic Anhydrase Isoform Inhibitors Based on Pyrrol-2-one Moiety. J Med Chem 2024; 67:3018-3038. [PMID: 38301036 PMCID: PMC10895679 DOI: 10.1021/acs.jmedchem.3c02190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 01/10/2024] [Accepted: 01/11/2024] [Indexed: 02/03/2024]
Abstract
New dihydro-pyrrol-2-one compounds, featuring dual sulfonamide groups, were synthesized through a one-pot, three-component approach utilizing trifluoroacetic acid as a catalyst. Computational analysis using density functional theory (DFT) and condensed Fukui function explored the structure-reactivity relationship. Evaluation against human carbonic anhydrase isoforms (hCA I, II, IX, XII) revealed potent inhibition. The widely expressed cytosolic hCA I was inhibited across a range of concentrations (KI 3.9-870.9 nM). hCA II, also cytosolic, exhibited good inhibition as well. Notably, all compounds effectively inhibited tumor-associated hCA IX (KI 1.9-211.2 nM) and hCA XII (low nanomolar). Biological assessments on MCF7 cancer cells highlighted the compounds' ability, in conjunction with doxorubicin, to significantly impact tumor cell viability. These findings underscore the potential therapeutic relevance of the synthesized compounds in cancer treatment.
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Affiliation(s)
- Cristina M. Al-Matarneh
- Center
of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular
Chemistry of Romanian Academy, 41A Grigore Ghica Voda Alley, Iasi 700487, Romania
- Research
Institute of the University of Bucharest-ICUB, 90 Sos. Panduri, 050663 Bucharest, Romania
| | - Mariana Pinteala
- Center
of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular
Chemistry of Romanian Academy, 41A Grigore Ghica Voda Alley, Iasi 700487, Romania
| | - Alina Nicolescu
- NMR
Laboratory ”Petru Poni” Institute of Macromolecular
Chemistry of Romanian Academy, 41A Grigore Ghica Voda Alley, Iasi 700487, Romania
| | - Mihaela Silion
- Physics
of Polymers and Polymeric Materials Department, “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Francesca Mocci
- Department
of Chemical and Geological Sciences, University
of Cagliari, 09124 Cagliari, Italy
| | - Razvan Puf
- Center
of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular
Chemistry of Romanian Academy, 41A Grigore Ghica Voda Alley, Iasi 700487, Romania
| | - Andrea Angeli
- Sezione di
Scienze Farmaceutiche, NeuroFarba Department, Universita degli Studi di Firenze, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Italy
| | - Marta Ferraroni
- Dipartimento
di Chimica “Ugo Schiff”, University
of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, Florence Italy
| | - Claudiu T. Supuran
- Sezione di
Scienze Farmaceutiche, NeuroFarba Department, Universita degli Studi di Firenze, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Italy
| | - Susi Zara
- Department
of Pharmacy, “G. d’Annunzio”
University of Chieti-Pescara, via dei Vestini 31, 66100 Chieti, Italy
| | - Simone Carradori
- Department
of Pharmacy, “G. d’Annunzio”
University of Chieti-Pescara, via dei Vestini 31, 66100 Chieti, Italy
| | - Niccolò Paoletti
- Department
of Chemical and Geological Sciences, University
of Cagliari, 09124 Cagliari, Italy
- Sezione di
Scienze Farmaceutiche, NeuroFarba Department, Universita degli Studi di Firenze, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Italy
| | - Alessandro Bonardi
- Sezione di
Scienze Farmaceutiche, NeuroFarba Department, Universita degli Studi di Firenze, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Italy
- NEUROFARBA
Department, Pharmaceutical and Nutraceutical Section, Laboratory of
Molecular Modeling Cheminformatics & QSAR, University of Florence, Via U. Schiff 6, 50019 Sesto Fiorentino, Firenze Italy
| | - Paola Gratteri
- NEUROFARBA
Department, Pharmaceutical and Nutraceutical Section, Laboratory of
Molecular Modeling Cheminformatics & QSAR, University of Florence, Via U. Schiff 6, 50019 Sesto Fiorentino, Firenze Italy
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18
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Liu J, Xia YG, Sun HD, Hu B, Zhang B, Lu Q. Insight into the fate of nitrogen during char thermal conversion and the influence mechanism of potassium: A theoretical research. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:168880. [PMID: 38040354 DOI: 10.1016/j.scitotenv.2023.168880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 11/23/2023] [Accepted: 11/23/2023] [Indexed: 12/03/2023]
Abstract
Nitrogen oxides (NOₓ) are primary pollutants produced during biomass combustion. During the devolatilization stage, char nitrogen (char(N)) is formed. In the subsequent char combustion stage, char(N) can decompose directly into NOx precursors or engage in heterogeneous reactions with O2 or NO to form NO and N2. Nonetheless, a comprehensive understanding of the reaction mechanisms and competitiveness of char(N) migration, especially the influence of the alkali metal potassium (K) present in biomass, remains incomplete. Building on the Zigzag char(N) models, the present study delves into the migration reactions of char(N), assessing their competitive dynamics through the integration of density functional theory, electronic structure analysis, and conventional transition state theory. Furthermore, it examines the impact of K on char(N) conversion. The competitiveness of the heterogeneous reactions follows the sequence: heterogeneous reduction of NO to N2 > heterogeneous oxidation of char(N) to NO > decomposition of char(N) to NOx precursors. Moreover, the formation of HCN is more favorable than NH₃ production. The successive conversion from char(N) to NO and then to N2 is the predominant migration route for char(N), with NO generation as the pivotal step. The less preferred char(N) migration route involves decomposition to NH3/HCN, followed by oxidation to NOx within the main combustion zone, which cannot be mitigated by char. K can accelerate NO generation and sustain the primacy of the heterogeneous NO reduction, consequently enhancing the oxidation-reduction process of char(N). As a result, K plays a constructive role in managing NOx emissions during the thermal conversion of char.
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Affiliation(s)
- Ji Liu
- National Engineering Research Center of New Energy Power Generation, North China Electric Power University, Beijing 102206, PR China; Suzhou Institute of North China Electric Power University, Suzhou, Jiangsu 215123, PR China
| | - Yuan-Gu Xia
- National Engineering Research Center of New Energy Power Generation, North China Electric Power University, Beijing 102206, PR China
| | - Huai-de Sun
- National Engineering Research Center of New Energy Power Generation, North China Electric Power University, Beijing 102206, PR China
| | - Bin Hu
- National Engineering Research Center of New Energy Power Generation, North China Electric Power University, Beijing 102206, PR China.
| | - Bing Zhang
- National Engineering Research Center of New Energy Power Generation, North China Electric Power University, Beijing 102206, PR China
| | - Qiang Lu
- National Engineering Research Center of New Energy Power Generation, North China Electric Power University, Beijing 102206, PR China.
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19
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Yan L, Guo M, Wan Y, Wan Y, Li Q, Zhu L, Yin H, Shi Y. Fluorescence emission mechanism for the π-conjugated zwitterion 2,4-Bisimidazolylphenol base on ESIPT: A TDDFT theoretical reconsideration. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 312:124043. [PMID: 38368821 DOI: 10.1016/j.saa.2024.124043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 02/01/2024] [Accepted: 02/11/2024] [Indexed: 02/20/2024]
Abstract
Molecules with zwitterionic characteristics exhibit significant potential for utilization in nonlinear optics, optoelectronics, and organic lasers owing to their large dipole moments. Recently, the synthesized compound 2,4-bis (4,5-diphenyl-1H-imidazol-2-yl) phenol (2,4-bImP) by Sakai et al. has been noticed for its unique photochromic properties in solvents [J. Phys. Chem. A, 125 (2021), 4784-4792]. The observed fluorescence in chloroform was attributed to the keto tautomer. Based on the excited state intramolecular proton transfer, the photochromism of 2,4-bImP in chloroform was interpreted as zwitterion production. However, the zwitterion with a specific electronic structure can be in resonance with the conventional neutral structure. The impact of the resonance contribution from the zwitterion and the conventional neutral structure on fluorescence attribution was not taken into account in the previous studies. In this investigation, the ESIPT mechanism of the 2,4-bImP in chloroform has been explored using both the density functional theory and the time-dependent density functional theory. The optimized geometric configuration parameters illustrate the molecular resonant properties. The calculated fluorescence spectra on the basis of the optimization results further corroborate that the fluorescence peaks after proton transfer originates from the resonance of the zwitterionic and the neutral configuration. The zwitterionic nature of the molecule was demonstrated by electrostatic potential and atomic dipole modified Hesfeld atomic charge (ADCH) analysis. Furthermore, the characterization of potential energy curves and IR spectrum further verified the resonance of both the zwitterionic and neutral structures. The results reveal that the 2,4-bImP molecule generates the neutral o-quinoid structure and the zwitterionic structure resonance phenomenon following ESIPT. The aforementioned resonance structure offers novel insights into the ascription of fluorescence. These discoveries establish the theoretical foundation for the exploration and development of zwitterions.
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Affiliation(s)
- Lu Yan
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
| | - Meilin Guo
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
| | - Yu Wan
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
| | - Yongfeng Wan
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
| | - Qi Li
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
| | - Lixia Zhu
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
| | - Hang Yin
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China.
| | - Ying Shi
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China.
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20
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Lu G, Li X, Li W, Liu Y, Wang N, Pan Z, Zhang G, Zhang Y, Lai B. Thermo-activated periodate oxidation process for tetracycline degradation: Kinetics and byproducts transformation pathways. JOURNAL OF HAZARDOUS MATERIALS 2024; 461:132696. [PMID: 37801979 DOI: 10.1016/j.jhazmat.2023.132696] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Revised: 09/27/2023] [Accepted: 10/01/2023] [Indexed: 10/08/2023]
Abstract
Periodate-based advanced oxidation processes have been diffusely practiced for pollutant decontamination. However, the thermo-activation of periodate process (heat/PI), an effective water pollution removal process, has been rarely discussed, and the degradation pathway of this heat/PI system requires investigation. In this work, tetracycline antibiotics were selected as the model micropollutant for the comprehensive evaluation of the heat/PI system. The heat/PI system exhibited good performance for tetracycline (TC) remediation with temperature increases. The principal reactive oxidative species in the heat/PI system was confirmed using quenching experiments and electron paramagnetic resonance experiments. Further, the potential reactive sites in the TC were identified based on the density functional theory calculation. Based on the detection results of intermediates, there was no significant difference in byproducts generated during TC degradation under various temperatures in the heat/PI system. The Toxicity Estimation Software Tool (T.E.S.T.) method was applied to calculate the individual toxicity of the byproducts. This study contributes to a comprehensive explanation of the process of the thermal activation of periodate, and in particular, it explains the source of oxidation power, the transformation of byproducts, and the toxicity of reaction systems.
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Affiliation(s)
- Gonggong Lu
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China; National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan 610064, China
| | - Xiang Li
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Wei Li
- MOE Key Laboratory of Deep Earth Science and Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Yang Liu
- MOE Key Laboratory of Deep Earth Science and Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China; State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China.
| | - Ningruo Wang
- MOE Key Laboratory of Deep Earth Science and Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Zhicheng Pan
- Water Safety and Water Pollution Control Engineering Technology Research Center in Sichuan Province, Haitian Water Group Co.,Ltd, Chengdu 610041, China.
| | - Guisheng Zhang
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yongli Zhang
- MOE Key Laboratory of Deep Earth Science and Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Bo Lai
- MOE Key Laboratory of Deep Earth Science and Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China; State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China
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21
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Gill WA, Aziz MT, Darwish HW, Janjua MRSA. Exploring HCl-HCl interactions: QZVPP calculations, improved Lennard-Jones potential, and second virial coefficient analysis for thermodynamics and industrial applications. RSC Adv 2024; 14:1890-1901. [PMID: 38192328 PMCID: PMC10772863 DOI: 10.1039/d3ra04387h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 12/13/2023] [Indexed: 01/10/2024] Open
Abstract
In this paper, we present a comprehensive analysis of HCl-HCl interactions, including QZVPP calculations, energy fitting, conformation validation, and the determination of the second virial coefficient B using improved Lennard-Jones (ILJ) potential parameters. To acquire accurate interaction energies, initial QZVPP calculations are performed on approximately 1851 randomly generated HCl-HCl conformations. Then, these energies are used to fit an improved Lennard-Jones potential energy surface, allowing for a robust description of HCl-HCl interactions. The ILJ potential parameters are then used to validate particular HCl dimer conformations, ensuring their stability and consistency with experimental observations. The correlation between calculated and experimental conformations strengthens the validity of the ILJ potential parameters. In addition, the second viral coefficient B is calculated at various temperatures using the ILJ potential. The obtained B values are compared to experimental data, demonstrating close agreement, and validating the ILJ potential's ability to accurately capture the intermolecular interactions and gas-phase behavior of the HCl-HCl system. The results of this study demonstrate the effective implementation of QZVPP calculations, energy fitting, and ILJ potential parameters in validating HCl-HCl conformations and accurately determining the second virial coefficient B. The high degree of concordance between calculated B values and experimental data demonstrates the validity of the ILJ potential and its suitability for modeling HCl-HCl interactions. This research contributes to a greater comprehension of HCl-HCl interactions and their implications for numerous chemical and atmospheric processes. The validated conformations, energy fitting method, and calculated second virial coefficients provide valuable instruments for future research and pave the way for more accurate modeling and simulations of HCl-HCl systems.
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Affiliation(s)
- Waqas Amber Gill
- Departamento de Química Física, Universidad de Valencia Avda Dr Moliner, 50, Burjassot E-46100 Valencia Spain
| | - Muhammad Tariq Aziz
- Department of Chemistry, Government College University Faisalabad Faisalabad 38000 Pakistan
| | - Hany W Darwish
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University P.O. Box 2457 Riyadh 11451 Saudi Arabia
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22
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Cao Q, Xing Y, Di L, Yang Z, Chen X, Xia Z, Ling J, Wang H. Photostable and high-brightness aggregation-induced emission of iridium luminogen achieving reliable and sensitive continuous luminescent quantification of molecular oxygen. Talanta 2024; 266:125059. [PMID: 37572477 DOI: 10.1016/j.talanta.2023.125059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/02/2023] [Accepted: 08/05/2023] [Indexed: 08/14/2023]
Abstract
Online continuous luminescent oxygen quantification requires both high-brightness luminescence and superior photobleaching resistance of luminogens to afford the requisite level of sensitivity and operational stability, which remains a challenge. Herein, a fluorine-free design strategy of incremental rotors for preparing iridium luminogens with excellent photobleaching resistance and high-brightness aggregation-induced emission (AIE) is presented. The incremental rotors gradually improve the rotational activity of substituents, efficaciously activating the AIE with synchronously improved aggregation-state luminescence efficiency, which is theoretically confirmed by the variations of dipole moments and experimentally verified by the luminescent lifetimes. Moreover, the introduction of triphenylamine significantly improves the photobleaching resistance of iridium luminogens. Subsequently, by optimizing the loading capacity of the iridium luminogen, the improvement of high-brightness AIE on the oxygen sensitivity of ethocel films is successfully observed. Thickness attenuation of ethocel films dramatically shortens the quenching/recovery response to 4.7 s. Importantly, owing to the exceptional photobleaching resistance of the iridium luminogen, distinguished photo-fatigue resistance with operational stability is exhibited by the ethocel film with no luminescence attenuation during 8000 s continuous oxygen quantification.
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Affiliation(s)
- Qingsong Cao
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, 113001, China
| | - Yang Xing
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, 113001, China.
| | - Ling Di
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, 113001, China.
| | - Zhanxu Yang
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, 113001, China.
| | - Xuebing Chen
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, 113001, China
| | - Zhengqiang Xia
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710127, China.
| | - Jianghua Ling
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, 113001, China
| | - Hongguo Wang
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, 113001, China
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23
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Meng X, Désesquelles P, Xu L. Decomposition mechanisms of nuclear-grade cationic exchange resin by advanced oxidation processes: Statistical molecular fragmentation model and DFT calculations. J Environ Sci (China) 2024; 135:433-448. [PMID: 37778817 DOI: 10.1016/j.jes.2023.01.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 01/16/2023] [Accepted: 01/29/2023] [Indexed: 10/03/2023]
Abstract
The treatment and disposal of radioactive waste are presently facing great challenges. Spent ion exchange resins have become a focus of attention due to their high production and serious environmental risks. In this paper, a simplified model of cationic exchange resin is proposed, and the degradation processes of cationic resin monomer initiated by hydroxyl radicals (·OH) are clarified by combining statistical molecular fragmentation (SMF) model and density functional theory (DFT) calculations. The prediction of active sites indicates that the S-O bonds and the C-S bond of the sulfonic group are more likely to react during the degradation. The meta-position of the sulfonic group on the benzene ring is the most active site, and the benzene ring without the sulfonic group has a certain reactivity. The C11-C14 and C17-C20 bonds, on the carbon skeleton, are the most easily broken. It is also found that dihydroxy addition and elimination reactions play a major role in the process of desulfonation, carbon skeleton cleavage and benzene ring separation. The decomposition mechanisms found through the combination of physical models and chemical calculations, provide theoretical guidance for the treatment of complex polycyclic aromatic hydrocarbons.
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Affiliation(s)
- Xiang Meng
- Department of Nuclear Engineering and Technology, School of Energy and Power Engineering, Huazhong University of Science & Technology, Wuhan 430074, China
| | - Pierre Désesquelles
- Department of Nuclear Engineering and Technology, School of Energy and Power Engineering, Huazhong University of Science & Technology, Wuhan 430074, China; CNRS, Laboratoire de Physique des Gaz et des Plasmas, Université Paris-Saclay, Orsay 91405, France
| | - Lejin Xu
- Department of Nuclear Engineering and Technology, School of Energy and Power Engineering, Huazhong University of Science & Technology, Wuhan 430074, China; State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
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24
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Gou X, Wu Y, Wang M, Liu N, Lan W, Zhang YQ, Shi W, Cheng P. The influence of light on the field-induced magnetization dynamics of two Er(III) coordination polymers with different halogen substituents. Dalton Trans 2023; 53:148-152. [PMID: 38018387 DOI: 10.1039/d3dt02714g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
Photocontrolled magnetic properties are fundamental for the applications of molecular magnets, which have the features of high time and space resolution; however, such magnetic properties are highly challenging to be achieved owing to the weak light-matter interactions. Herein, the influence of in situ light irradiation on the field-induced magnetization dynamics of two Er(III) coordination polymers 1 and 2 with the same coordination skeletons but different halogen substituents was studied. 1 and 2, and their in situ photoexcited products 1a and 2a, display field-induced magnetization dynamics based on Orbach and/or Raman processes. The magnetization dynamics are fine-modulated by the synergetic effect of light irradiation and a ligand substituent, due to the charge re-distribution of the excited states of the ligand.
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Affiliation(s)
- Xiaoshuang Gou
- Department of Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Yuewei Wu
- Department of Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Mengmeng Wang
- Department of Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Ning Liu
- Department of Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Wenlong Lan
- Department of Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Yi-Quan Zhang
- School of Physical Science and Technology, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Wei Shi
- Department of Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Peng Cheng
- Department of Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
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25
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Radael GN, Oliveira GG, Pontes RM. A DFT study of ethanol interaction with the bimetallic clusters of PtSn and its implications on reactivity. J Mol Graph Model 2023; 125:108621. [PMID: 37689026 DOI: 10.1016/j.jmgm.2023.108621] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/28/2023] [Accepted: 08/30/2023] [Indexed: 09/11/2023]
Abstract
The comprehension of the factors affecting the adsorption of ethanol over metals and metal alloys is a crucial step for the rational development of new catalysts for hydrogen production through ethanol reforming. In this work, we analyze the effect of combining Pt and Sn on a metal cluster on the complexation energy and reactivity for OH dehydrogenation of ethanol. Metal clusters of Pt10, Sn10 and Pt5Sn5 had their putative minimum located with the help of the artificial bee colony algorithm. Whereas the isolated Pt cluster shows a high degree of polarization (ESP surface), the Sn cluster shows a quite uniform electron density surface. The PtSn cluster is strongly polarized, with Pt atoms withdrawing electron density of Sn atoms. Complexation occurs with the oxygen atom of ethanol directed towards the point of highest electron potential in the ESP surface. Pt presents the highest complexation energy, -20.90 kcal/mol, against only -7.83 kcal/mol (at the B97-3c level). For the PtSn cluster, the value is intermediate, namely -12.39 kcal/mol. The more malleable electron density of Pt and its electron affinity are responsible for its highest complexation energy. These characteristics are partially transferred to the PtSn cluster. QTAIM results show that, for the PtSn cluster, the O-H bond in ethanol is somewhat weaker than for pure Pt and Sn. As a consequence, the energy barrier for the O-H dehydrogenation has its lowest value for the PtSn cluster, which shows that the alloying of two metals can lead to quite quite unexpected results opening the perspective for a more rational fine tuning of catalysts properties.
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Affiliation(s)
- Graziela N Radael
- Departamento de Química, Universidade Estadual de Maringá, Av. Colombo, 5790, Maringá, Paraná, CEP 87900-020, Brazil
| | - Gabriel G Oliveira
- Departamento de Química, Universidade Estadual de Maringá, Av. Colombo, 5790, Maringá, Paraná, CEP 87900-020, Brazil
| | - Rodrigo M Pontes
- Departamento de Química, Universidade Estadual de Maringá, Av. Colombo, 5790, Maringá, Paraná, CEP 87900-020, Brazil.
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26
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Zhang HT, Xie F, Guo YH, Xiao Y, Zhang MT. Selective Four-Electron Reduction of Oxygen by a Nonheme Heterobimetallic CuFe Complex. Angew Chem Int Ed Engl 2023; 62:e202310775. [PMID: 37837365 DOI: 10.1002/anie.202310775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 10/11/2023] [Accepted: 10/12/2023] [Indexed: 10/16/2023]
Abstract
We report herein the first nonheme CuFe oxygen reduction catalyst ([CuII (bpbp)(μ-OAc)2 FeIII ]2+ , CuFe-OAc), which serves as a functional model of cytochrome c oxidase and can catalyze oxygen reduction to water with a turnover frequency of 2.4×103 s-1 and selectivity of 96.0 % in the presence of Et3 NH+ . This performance significantly outcompetes its homobimetallic analogues (2.7 s-1 of CuCu-OAc with %H2 O2 selectivity of 98.9 %, and inactive of FeFe-OAc) under the same conditions. Structure-activity relationship studies, in combination with density functional theory calculation, show that the CuFe center efficiently mediates O-O bond cleavage via a CuII (μ-η1 : η2 -O2 )FeIII peroxo intermediate in which the peroxo ligand possesses distinctive coordinating and electronic character. Our work sheds light on the nature of Cu/Fe heterobimetallic cooperation in oxygen reduction catalysis and demonstrates the potential of this synergistic effect in the design of nonheme oxygen reduction catalysts.
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Affiliation(s)
- Hong-Tao Zhang
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Fei Xie
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Yu-Hua Guo
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Yao Xiao
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Ming-Tian Zhang
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing, 100084, China
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27
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Xu CK, Yang GW, Lu C, Wu GP. A Binary Silicon-Centered Organoboron Catalyst with Superior Performance to That of Its Bifunctional Analogue. Angew Chem Int Ed Engl 2023; 62:e202312376. [PMID: 37847123 DOI: 10.1002/anie.202312376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 10/15/2023] [Accepted: 10/17/2023] [Indexed: 10/18/2023]
Abstract
This work reported that a silicon-centered alkyl borane/ammonium salt binary (two-component) catalyst exhibits much higher activity than its bifunctional analogue (one-component) for the ring-opening polymerization of propylene oxide, showing 7.3 times the activity of its bifunctional analogue at a low catalyst loading of 0.01 mol %, and even 15.3 times the activity at an extremely low loading of 0.002 mol %. By using 19 F NMR spectroscopy, control experiments, and theoretical calculation we discovered that the central silicon atom displays appropriate electron density and a larger intramolecular cavity, which is useful to co-activate the monomer and to deliver propagating chains, thus leading to a better intramolecular synergic effect than its bifunctional analogue. A unique two-pathway initiation mode was proposed to explain the unusual high activity of the binary catalytic system. This study breaks the traditional impression of the binary Lewis acid/nucleophilic catalyst with poor activity because of the increase in entropy.
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Affiliation(s)
- Cheng-Kai Xu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Key Laboratory of Adsorption and Separation Materials and Technologies of Zhejiang Province, Department of Polymer Science and Engineering, Zhejiang University, Yuhangtang Road 866, Hangzhou, 310058, China
| | - Guan-Wen Yang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Key Laboratory of Adsorption and Separation Materials and Technologies of Zhejiang Province, Department of Polymer Science and Engineering, Zhejiang University, Yuhangtang Road 866, Hangzhou, 310058, China
| | - Chenjie Lu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Key Laboratory of Adsorption and Separation Materials and Technologies of Zhejiang Province, Department of Polymer Science and Engineering, Zhejiang University, Yuhangtang Road 866, Hangzhou, 310058, China
- College of Material Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, China
| | - Guang-Peng Wu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Key Laboratory of Adsorption and Separation Materials and Technologies of Zhejiang Province, Department of Polymer Science and Engineering, Zhejiang University, Yuhangtang Road 866, Hangzhou, 310058, China
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28
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Lu SJ, Liang X, Zhang GS, Gao ZO, Wang K. Structural Determination and Bonding Characteristics of the Gas-Phase Ta 2Si 2̅ Anion and Its Neutral: Anion Photoelectron Spectroscopy and Theoretical Studies. J Phys Chem A 2023; 127:9797-9803. [PMID: 37944049 DOI: 10.1021/acs.jpca.3c06588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
The structures and bonding characteristics of Ta2Si2̅/0 clusters are investigated using anion photoelectron spectroscopy and quantum chemical calculations. The vertical detachment energy of the Ta2Si2̅ anion is measured to be 2.00 ± 0.08 eV using the 266 nm photon. It is found that the Ta2Si2̅ anion has three low-energy isomers with a C2v symmetric Ta-Ta dibridged structural framework, all of which contribute to the experimental photoelectron spectrum, while the Ta2Si2 neutral also has a C2v symmetric Ta-Ta dibridged structural framework. The charge-transfer from Ta atoms to Si atoms is discovered using atomic dipole moment corrected Hirshfeld analysis for the Ta2Si2̅ anion and Ta2Si2 neutral. Chemical bonding investigations show that both the Ta2Si2̅ anion and Ta2Si2 neutral have a strong covalent Ta-Ta bond, as well as σ and π double bonding patterns. Furthermore, the Ta atoms are linked together by a single 2c-2e Ta2 σ bond, whereas the Si atoms are linked together with the Ta atoms via four 2c-2e TaSi σ bonds, two 3c-2e TaSi2 σ bonds, one 4c-2e Ta2Si2 σ bond, and one 4c-2e Ta2Si2 π bond.
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Affiliation(s)
- Sheng-Jie Lu
- Department of Chemistry and Chemical Engineering, Heze University, Heze, Shandong Province 274015, China
| | - Xia Liang
- Department of Agricultural and Biological Engineering (Peony College), Heze University, Heze, Shandong Province 274015, China
| | - Guo-Song Zhang
- Department of Agricultural and Biological Engineering (Peony College), Heze University, Heze, Shandong Province 274015, China
| | - Zhao-Ou Gao
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Kang Wang
- College of Physics and Electronic Engineering, Heze University, Heze, Shandong Province 274015, China
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29
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Wang W, He Y, Tu L, Liu H. Electric-Field Effects on the Internal Charge Reorganization Energies of Crystalline Organic Semiconductors. J Phys Chem Lett 2023; 14:10233-10241. [PMID: 37934702 DOI: 10.1021/acs.jpclett.3c02657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2023]
Abstract
The synergistic effects of molecular packing and external electric fields (EEFs, including axial and nonaxial fields) on the internal charge reorganization energies (λ) of typical p-type SMOS have been investigated. Combined quantum and molecular mechanics calculations show that, for all-ring-fused rigid molecules single-molecule approximation and neglect of EEFs are adequate for computing λ, while for nonrigid molecules with inter-ring carbon-carbon (IRCC) linkers, the above simplifications may cause a significant deviation from the actual λ. For nonrigid molecules, solid-state packing can prevent "bad" EEFs (Fz and Fyz) from enhancing λ (adverse to charge transfer), while it allows λ to be greatly reduced (in favor of charge transfer) if "good" EEFs (Fx, Fxy, Fxz and Fxyz) are imposed. Last, a simple strategy that can divide λ into each subring contribution for IRCC-linked molecules has been proposed.
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Affiliation(s)
- Wenhao Wang
- College of Chemistry and Materials Science, Jinan University, 601 Huang-Pu Avenue West, Guangzhou 510632, China
| | - Yonglai He
- College of Chemistry and Materials Science, Jinan University, 601 Huang-Pu Avenue West, Guangzhou 510632, China
| | - Lingzhi Tu
- College of Chemistry and Materials Science, Jinan University, 601 Huang-Pu Avenue West, Guangzhou 510632, China
| | - Hongguang Liu
- College of Chemistry and Materials Science, Jinan University, 601 Huang-Pu Avenue West, Guangzhou 510632, China
- School of Applied Physics and Materials, Wuyi University, Jiangmen 529020, China
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30
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Zhang Q, Li J. Benchmark computational investigations for the basic model of the salt-water complex: NaCl(H 2O) and its anion NaCl(H 2O) . Phys Chem Chem Phys 2023; 25:27215-27229. [PMID: 37791409 DOI: 10.1039/d3cp03421f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
The microsolvation of salts in water is a fundamental physicochemical process. In this work, the aqueous salt complex NaCl(H2O) and its anion NaCl(H2O)- were investigated using comprehensive calculations, including the costly and accurate CCSD(T)-F12a and focal point analysis (FPA) methods. For the neutral NaCl(H2O), three isomers exist, two of which are mirror-symmetric with almost identical structures and their corresponding anions are also mirror-symmetric. For the NaCl(H2O)- anion, there are four isomers. Several transition states are found for the first time. The structural rearrangements of neutral NaCl(H2O) and NaCl(H2O)- anions are mainly caused by breaking and forming of the hydrogen bonds and the enhancement and weakening of interactions between Na and O atoms. The distributions of the anion complexes from 15-300 K are computed and compared to recent experimental results. The analysis of the intermolecular weak interactions shows the weak van der Waals interactions between Na and O atoms, as well as hydrogen bonding between H and Cl. Moreover, the theoretically predicted anion photoelectron spectra are assigned and analyzed in detail, and they agree with experimental spectra satisfactorily. The Na-Cl stretching vibrational mode dominates the vibrational structure in both anion spectra with some minor contributions from the intermolecular motions between H2O and NaCl.
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Affiliation(s)
- Qi Zhang
- School of Chemistry and Chemical Engineering & Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, China.
| | - Jun Li
- School of Chemistry and Chemical Engineering & Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, China.
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31
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Zhang Y, Li S, Qiao X, Guan Q, Li W. Efficient and stable N-heterocyclic ketone-Cu complex catalysts for acetylene hydrochlorination: the promotion effect of ligands revealed from DFT calculations. Phys Chem Chem Phys 2023; 25:25581-25593. [PMID: 37721015 DOI: 10.1039/d3cp02514d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/19/2023]
Abstract
Cu-based catalysts are a promising alternative to toxic mercury catalysts for acetylene hydrochlorination, but their effectiveness is limited due to the poor dispersion and deactivation caused by reduction, agglomeration, and carbon deposition. In this study, the activity and stability of carbon-supported CuCl2 catalysts were largely improved by introducing N-heterocyclic ketones. Remarkably, N-methyl-2-pyridone (NM2P) coordinated Cu-based catalysts exhibited over 95% acetylene conversion with better stability under the reaction conditions of T = 180 °C, GHSV (C2H2) of 80 h-1, and VHCl/VC2H2 = 1.2. The combined results of characterization and exhaustive density functional theory (DFT) calculations revealed that the O-Cu coordination between the NM2P ligand and Cu cation strengthened the combination of reactants and Cu active sites, lowering the key reaction energy barrier, thereby leading to high activity. Meanwhile, the addition of the NM2P ligand significantly inhibited the reduction of Cu2+ to Cu+/Cu0, avoiding the formation of CuCl aggregates and the coking caused by Cu0, enhancing the catalytic stability. Overall, our study provides important insights into the design and optimization of Cu-based catalysts for acetylene hydrochlorination.
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Affiliation(s)
- Yilin Zhang
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, No. 94 Weijin Road, Tianjin 300071, P. R. China.
| | - Sen Li
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, No. 94 Weijin Road, Tianjin 300071, P. R. China.
| | - Xianliang Qiao
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, No. 94 Weijin Road, Tianjin 300071, P. R. China.
| | - Qingxin Guan
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, No. 94 Weijin Road, Tianjin 300071, P. R. China.
| | - Wei Li
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, No. 94 Weijin Road, Tianjin 300071, P. R. China.
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32
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Zhang LJ, Yang B, Li DZ, Pei L, Farooq U, Xu XL, Zheng WJ, Xu HG. Structural Evolution and Electronic Properties of V 2Si n-/0 ( n = 7-14) Clusters: Anion Photoelectron Spectroscopy and Theoretical Calculations. Inorg Chem 2023; 62:14727-14738. [PMID: 37646377 DOI: 10.1021/acs.inorgchem.3c02174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
A systematic study of the structures and electronic properties of V2-doped silicon clusters, V2Sin-/0 (n = 7-14), was carried out by anion photoelectron spectroscopic experiments combined with theoretical calculations. According to the experimental spectra of V2Sin- (n = 7-14) clusters, the V2Si12- cluster has the highest vertical detachment energy (VDE) of 3.66 eV, while V2Si7- and V2Si14- clusters have lower VDEs of 2.81 and 2.84 eV, respectively. The most stable structure searches find that two V atoms in the V2Sin- clusters with size n = 7 and 8 are located at the surface, while V2Sin- clusters with n ≥ 9 prefer cage-like structures. Based on the analysis of the structural evolution of V2Sin- (n = 9-14) clusters, it can be clearly seen how the antihexagonal prism with one V encapsulated in the cage is gradually built from n = 9 to 12 and further developed from n = 12 to 14 with the extra silicon atoms located at the surface of the Si12 cage. The molecular orbital and the atoms in molecule analysis of the V2Sin- (n = 7-14) anions demonstrate that the strong V-V bond and the delocalized interaction between the V2 moiety and the Sin ligand play a significant role in stabilizing the cluster structures. A strong linear correlation has been found between the Wiberg bond order of the V-V bond and the electron density at the V-V bond critical points.
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Affiliation(s)
- Li-Juan Zhang
- College of Chemical Engineering and Safety Engineering, Binzhou University, Binzhou, Shandong 256600, China
| | - Bin Yang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Da-Zhi Li
- College of Chemical Engineering and Safety Engineering, Binzhou University, Binzhou, Shandong 256600, China
| | - Ling Pei
- College of Chemical Engineering and Safety Engineering, Binzhou University, Binzhou, Shandong 256600, China
| | - Umar Farooq
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Department of Chemistry, COMSATS University Islamabad, Abbottabad-Campus, Abbottabad, Khyber Pakhtunkhwa 22060, Pakistan
| | - Xi-Ling Xu
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Wei-Jun Zheng
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Hong-Guang Xu
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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33
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Hu J, Zhou M, Li K, Yao A, Wang Y, Zhu Q, Zhou Y, Huang L, Pei Y, Du Y, Jin S, Zhu M. Evolution of Electrocatalytic CO 2 Reduction Activity Induced by Charge Segregation in Atomically Precise AuAg Nanoclusters Based on Icosahedral M 13 Unit 3D Assembly. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2301357. [PMID: 37127865 DOI: 10.1002/smll.202301357] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 04/05/2023] [Indexed: 05/03/2023]
Abstract
The precise self-assembly of building blocks at atomic level provides the opportunity to achieve clusters with advanced catalytic properties. However, most of the current self-assembled materials are fabricated by 1/2D assembly of blocks. High dimensional (that is, 3D) assembly is widely believed to improve the performance of cluster. Herein, the effect of 3D assembly on the activity for electrocatalytic CO2 reduction reaction (CO2 RR) is investigated by using a range of clusters (Au8 Ag55 , Au8 Ag57 , Au12 Ag60 ) based on 3D assembly of M13 unit as models. Although three clusters have almost the same sizes and geometric structures, Au8 Ag55 exhibits the best CO2 RR performance due to the strong CO2 adsorption capacity and effective inhibition of H2 evolution competition reaction. The deep insight into the superior activity of Au8 Ag55 is the unique electronic structure attributed to the charge segregation. This study not only demonstrates that the assembly mode greatly affects the catalytic activity, but also offers an idea for rational designing and precisely constructing catalysts with controllable activities.
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Affiliation(s)
- Jiashen Hu
- Department of Materials Science and Engineering, Centre for Atomic Engineering of Advanced Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei, 230601, China
| | - Manman Zhou
- Department of Materials Science and Engineering, Centre for Atomic Engineering of Advanced Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei, 230601, China
- Department of Chemistry, Key Laboratory of Environmentally Friendly Chemistry and Applications of MOE, Xiangtan University, Xiangtan, Hunan, 411105, China
| | - Kang Li
- Department of Chemistry, Key Laboratory of Environmentally Friendly Chemistry and Applications of MOE, Xiangtan University, Xiangtan, Hunan, 411105, China
| | - Aimin Yao
- Department of Materials Science and Engineering, Centre for Atomic Engineering of Advanced Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei, 230601, China
| | - Yan Wang
- Department of Materials Science and Engineering, Centre for Atomic Engineering of Advanced Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei, 230601, China
| | - Qingtao Zhu
- Department of Materials Science and Engineering, Centre for Atomic Engineering of Advanced Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei, 230601, China
| | - Yanting Zhou
- Department of Materials Science and Engineering, Centre for Atomic Engineering of Advanced Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei, 230601, China
| | - Liu Huang
- Department of Materials Science and Engineering, Centre for Atomic Engineering of Advanced Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei, 230601, China
| | - Yong Pei
- Department of Chemistry, Key Laboratory of Environmentally Friendly Chemistry and Applications of MOE, Xiangtan University, Xiangtan, Hunan, 411105, China
| | - Yuanxin Du
- Department of Materials Science and Engineering, Centre for Atomic Engineering of Advanced Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei, 230601, China
| | - Shan Jin
- Department of Materials Science and Engineering, Centre for Atomic Engineering of Advanced Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei, 230601, China
| | - Manzhou Zhu
- Department of Materials Science and Engineering, Centre for Atomic Engineering of Advanced Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei, 230601, China
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34
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Yang X, Li N, Li Y, Pang S. Can Catenated Nitrogen Compounds with Amine-like Structures Become Candidates for High-Energy-Density Compounds? J Org Chem 2023; 88:12481-12492. [PMID: 37590038 PMCID: PMC10476612 DOI: 10.1021/acs.joc.3c01225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Indexed: 08/18/2023]
Abstract
The worthwhile idea of whether amine-like catenated nitrogen compounds are stable enough to be used as high-energy materials was proposed and answered. Abstracting the NH3 structure into NR3 (R is the substituent) yields a new class of amine-like catenated nitrogen compounds. Most of the azole ring structures have a high nitrogen content and stability. Inspired by this idea, a series of new amine-like catenated nitrogen compounds (A1 to H5) were designed, and their basic energetic properties were calculated. The results showed that (1) amine-like molecular structures are often characterized by low density; however, the density of these compounds increases as the number of nitrogens in the azole ring increases; (2) these catenated nitrogen compounds generally have extremely high enthalpies of formation (882.91-2652.03 kJ/mol), and the detonation velocity of some compounds exceeds 9254.00 m/s; (3) the detonation performance of amine-like catenated nitrogen compounds designed based on imidazole and pyrazole rings is poor due to their low nitrogen content; and (4) the bond dissociation enthalpy of trigger bonds of most compounds is higher than 84 kJ/mol, indicating that these compounds have a certain thermodynamic stability. In summary, amine-like catenated nitrogen compounds have the potential to become energetic compounds with excellent detonation properties and should be considered to be synthesized by experimental chemists.
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Affiliation(s)
- Xinbo Yang
- School
of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
- School
of Mechatronical Engineering, Beijing Institute
of Technology, Beijing 100081, China
| | - Nan Li
- School
of Mechatronical Engineering, Beijing Institute
of Technology, Beijing 100081, China
| | - Yuchuan Li
- School
of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Siping Pang
- School
of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
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35
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Shtepliuk I. A DFT Study of Phosphate Ion Adsorption on Graphene Nanodots: Implications for Sensing. SENSORS (BASEL, SWITZERLAND) 2023; 23:5631. [PMID: 37420797 DOI: 10.3390/s23125631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 06/12/2023] [Accepted: 06/14/2023] [Indexed: 07/09/2023]
Abstract
The optical properties of graphene nanodots (GND) and their interaction with phosphate ions have been investigated to explore their potential for optical sensing applications. The absorption spectra of pristine GND and modified GND systems were analyzed using time-dependent density functional theory (TD-DFT) calculation investigations. The results revealed that the size of adsorbed phosphate ions on GND surfaces correlated with the energy gap of the GND systems, leading to significant modifications in their absorption spectra. The introduction of vacancies and metal dopants in GND systems resulted in variations in the absorption bands and shifts in their wavelengths. Moreover, the absorption spectra of GND systems were further altered upon the adsorption of phosphate ions. These findings provide valuable insights into the optical behavior of GND and highlight their potential for the development of sensitive and selective optical sensors for phosphate detection.
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Affiliation(s)
- Ivan Shtepliuk
- Semiconductor Materials Division, Department of Physics, Chemistry and Biology-IFM, Linköping University, S-58183 Linköping, Sweden
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36
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Hong D, Zeng W, Liu ZT, Liu FS, Liu QJ. Initial Decomposition of DATB Induced by an External Electric Field. J Phys Chem A 2023. [PMID: 37307408 DOI: 10.1021/acs.jpca.3c01298] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
1,3-Diamino-2,4,6-trinitrobenzene (DATB), a nitro aromatic explosive with excellent properties, can be detonated by an electric field. Using first-principles calculation, we have investigated the initial decomposition of DATB under an electric field. In the realm of electric fields, the rotation of the nitro group around the benzene ring will cause deformation of the DATB structure. Furthermore, when an electric field is applied along the [100] or [001] direction, the C4-N10/C2-N8 bonds initiate decomposition due to electron excitation. On the contrary, the electric field along the [010] direction has a weak influence on DATB. These, together with electronic structures and infrared spectroscopy, give us a visual perspective of the energy transfer and the decomposition caused by C-N bond breaking.
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Affiliation(s)
- Dan Hong
- School of Physical Science and Technology, Southwest Jiaotong University, Key Laboratory of Advanced Technologies of Materials, Ministry of Education of China, Chengdu 610031, People's Republic of China
- School of Medical Information Engineering, Chengdu University of Traditional Chinese Medicine, Chengdu 610075, People's Republic of China
| | - Wei Zeng
- Teaching and Research Group of Chemistry, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 610075, People's Republic of China
| | - Zheng-Tang Liu
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, People's Republic of China
| | - Fu-Sheng Liu
- School of Physical Science and Technology, Southwest Jiaotong University, Key Laboratory of Advanced Technologies of Materials, Ministry of Education of China, Chengdu 610031, People's Republic of China
| | - Qi-Jun Liu
- School of Physical Science and Technology, Southwest Jiaotong University, Key Laboratory of Advanced Technologies of Materials, Ministry of Education of China, Chengdu 610031, People's Republic of China
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37
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Du R, Zhang Q, Wang B, Huang J, Deng S, Yu G. Quantitative structure-activity relationship models for the reaction rate coefficients between dissolved organic matter and PPCPs. JOURNAL OF HAZARDOUS MATERIALS 2023; 458:131845. [PMID: 37354719 DOI: 10.1016/j.jhazmat.2023.131845] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 05/29/2023] [Accepted: 06/11/2023] [Indexed: 06/26/2023]
Abstract
To predict PPCPs' photolysis rate in natural aquatic environment, it is essential to grasp the reaction rates between DOM and PPCPs, yet there are few measured data and no prediction models for this important photochemical parameter. To address this, a reaction rate coefficient (αDOM) was defined to describe the apparent rate of DOM-involved photoreaction for PPCPs. The measured αDOM values for 40 PPCPs in 9 DOM samples varied dramatically, ranging from (-2.1 ± 0.1)× 1010 to (2.2 ± 0.1)× 1011 M-1 s-1. Then the quantitative structure-activity relationship (QSAR) models were developed using chemical and water quality descriptors via the random forest method. We initially separated positive and negative values by a classifier with an AUC value of 0.965, followed by the construction of regression models for positive and negative values, respectively, using a regressor. Positive models achieved satisfactory goodness-of-fit and predictive ability (R2adj=0.92 and Q2ext=0.86), while negative models demonstrated acceptable performance (R2adj=0.71 and Q2ext=0.70). Finally, a comprehensive photolysis model that incorporates the QSAR models for αDOM was established and the significance of water quality parameters was emphasized through sensitive analysis. This model enables more elaborate predictions of PPCPs' photolysis rates in various water samples, providing valuable assistance for forecasting PPCPs' environmental fate.
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Affiliation(s)
- Roujia Du
- State Key Joint Laboratory of Environmental Simulation and Pollution Control (SKLESPC), Beijing Key Laboratory for Emerging Organic Contaminants Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Qianxin Zhang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control (SKLESPC), Beijing Key Laboratory for Emerging Organic Contaminants Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Bin Wang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control (SKLESPC), Beijing Key Laboratory for Emerging Organic Contaminants Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Jun Huang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control (SKLESPC), Beijing Key Laboratory for Emerging Organic Contaminants Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Shubo Deng
- State Key Joint Laboratory of Environmental Simulation and Pollution Control (SKLESPC), Beijing Key Laboratory for Emerging Organic Contaminants Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Gang Yu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control (SKLESPC), Beijing Key Laboratory for Emerging Organic Contaminants Control, School of Environment, Tsinghua University, Beijing 100084, China; Advanced Interdisciplinary Institute of Environmental and Ecology, Beijing Normal University, Zhuhai 519000, China.
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38
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Di L, Xing Y, Yang Z, Li C, Yu Z, Wang X, Xia Z. High-definition and robust visualization of latent fingerprints utilizing ultrabright aggregation-induced emission of iridium developer. Talanta 2023; 264:124775. [PMID: 37311327 DOI: 10.1016/j.talanta.2023.124775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 05/29/2023] [Accepted: 06/06/2023] [Indexed: 06/15/2023]
Abstract
Creation of AIEgens with high brightness is compactly related to acquiring optimum AIE capabilities and still faces challenges. This study proposes an ingenious structurally regulative approach for preparing ultrabright AIEgens, taking iridium complexes as the model. The incremental rotational activity of substituents obtained by fine adjustment of the stereoscopic configuration efficaciously activates the AIE of iridium complexes and synchronously imparts high-brightness luminescence. Subsequently, benefitting from the ultrabright AIE, high-resolution visualization of latent fingerprints (LFPs) is achieved on diverse substrates by transient immersion in a solution of the AIE-active iridium complex (Ir3) for 60 s. The LFPs stained by Ir3 are integral and distinct enough to possess level 1-3 detail features, which allow precisely realizing personal identification. The LFP photograph emerges inconspicuous attenuation of contrast when aged under ambient light for 10 days and then being continuously irradiated with high-power ultraviolet light for 1 h, reflecting extraordinary aging resistance. Notably, the ultrabright AIE of Ir3 with room-temperature phosphorescence feature successfully achieves enhanced visualization of local fingerprint details with ultrahigh contrast. This LFP visualization protocol based on the ultrabright AIEgens is practical and provides a reliable solution for forensic investigations in actual scenarios.
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Affiliation(s)
- Ling Di
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, 113001, China
| | - Yang Xing
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, 113001, China.
| | - Zhanxu Yang
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, 113001, China.
| | - Chun Li
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, 113001, China
| | - Zongbao Yu
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, 113001, China
| | - Xiaoning Wang
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, 113001, China
| | - Zhengqiang Xia
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710127, China.
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39
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Lai J, Tang T, Du X, Wang R, Liang J, Song D, Dang Z, Lu G. Oxidation of 1,3-diphenylguanidine (DPG) by goethite activated persulfate: Mechanisms, products identification and reaction sites prediction. ENVIRONMENTAL RESEARCH 2023:116308. [PMID: 37290617 DOI: 10.1016/j.envres.2023.116308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 05/23/2023] [Accepted: 05/31/2023] [Indexed: 06/10/2023]
Abstract
As emerging pollutants continue to be discovered, studies on the degradation behavior of emerging pollutants have proliferated, but few studies have focused on the reactivity of the new pollutants themselves. The work investigated the oxidation of a representative roadway runoff-derived organic contaminant, 1,3-diphenylguanidine (DPG) by goethite activated persulfate (PS). DPG exhibited the highest degradation rate (kd = 0.42 h-1) with present of PS and goethite at pH 5.0, then started to decrease with increasing pH. Chloride ion inhibited DPG degradation by scavenging HO·. Both HO· and SO4-· were generated in goethite activated PS system. Competitive kinetic experiments and flash photolysis experiments were conducted to investigate free radical reaction rate. The second-order reaction rate constants for DPG reacting with HO· and SO4-· were quantified (kDPG + HO·,kDPG + SO4-·), which both reached above 109 M-1 s-1. Chemical structures of five products were identified, four of them were previously detected in DPG photodegradation, bromination and chlorination processes. By density functional theory (DFT) calculations, ortho- and para- C were more easily attacked by both HO· and SO4-·. Abstraction of H on N by HO· and SO4-· were the favorable pathways, and the product TP-210 might be generated by cyclization of DPG radical from abstraction of H on N (3). The results of this study help us to better understand the reactivity of DPG with SO4-· and HO·.
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Affiliation(s)
- Jinbin Lai
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Ting Tang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou, 510006, China.
| | - Xiaodong Du
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Rui Wang
- South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, 510655, China
| | - Jiahao Liang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Dehao Song
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Zhi Dang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, 510006, China
| | - Guining Lu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou, 510006, China.
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40
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Lin J, Li Y, Ke Z. Feature Analysis in High-Dimensional Data: Structure-Activity Relationships of Lewis Acid-Transition-Metal Complex-Catalyzed H 2 Activation. J Phys Chem A 2023; 127:4375-4387. [PMID: 37183362 DOI: 10.1021/acs.jpca.2c08987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Lewis acid-transition metal (LA-TM) catalysts have been proven to have an advantage in catalyzing hydrogen activation. Herein, a high-dimensional structure-activity relationship study is performed for LA-TM-catalyzed hydrogen activation by density functional theory calculations. The DPB-Ni complex is taken as the representative catalyst, and the explored Lewis acid sites and transition-metal centers include B, Al, Ga and Ni, Pd, Pt, respectively. Totally, four general hydrogen activation mechanisms are systematically studied among the nine catalytic systems. The Ga-Ni system undergoes the lowest free energy of activation (11.0 kcal/mol), which is considered to be the optimal combination of the Lewis acid site and transition-metal center. Furthermore, more than 100 parameters are used to analyze the structure-activity relationship, including the physical structure, the bond order, the atom charge, and many other properties. Key parameters of important structures are dug out to show a high correlation with the activity of the LA-TM systems, including the M-H2 distance, the H-H bond length, the second-order perturbation stabilization energy of M-H2, the bond order of the LA-TM, and so on. The multivariable analysis indicates that the feature related to the basic elemental properties and the global feature codetermine the activity of the catalyst. In the LA-TM system, the combination of IpLA/IpTM (Ip, the first ionization energy, the feature related to basic elemental properties) and the chemical hardness (the global feature) can better explain the activity of the catalyst. The IpLA/IpTM reflects the difficulty of breaking the LA-TM bond, affecting the reaction site of activating hydrogen. The hardness reflects the stability and reactivity of LA-TM-RC complexes. The above two features with the addition of the LA-TM bond length (the local feature) can better reflect the activity of the LA-TM system-catalyzed H2 activation. The feature combinations and the method of multidimensional data analysis should be informative guidance for the rational design of efficient LA-TM catalysts for H2 activation.
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Affiliation(s)
- Jiaxin Lin
- School of Materials Science and Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Yinwu Li
- School of Materials Science and Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Zhuofeng Ke
- School of Materials Science and Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou 510006, P. R. China
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41
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Härterich M, Matler A, Dewhurst RD, Sachs A, Oppel K, Stoy A, Braunschweig H. A step-for-step main-group replica of the Fischer carbene synthesis at a borylene carbonyl. Nat Commun 2023; 14:2764. [PMID: 37179413 PMCID: PMC10183005 DOI: 10.1038/s41467-023-36251-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Accepted: 01/23/2023] [Indexed: 05/15/2023] Open
Abstract
The Fischer carbene synthesis, involving the conversion of a transition metal (TM)-bound CO ligand to a carbene ligand of the form [=C(OR')R] (R, R' = organyl groups), is one of the seminal reactions in the history of organometallic chemistry. Carbonyl complexes of p-block elements, of the form [E(CO)n] (E = main-group fragment), are much less abundant than their TM cousins; this scarcity and the general instability of low-valent p-block species means that replicating the historical reactions of TM carbonyls is often very difficult. Here we present a step-for-step replica of the Fischer carbene synthesis at a borylene carbonyl involving nucleophilic attack at the carbonyl carbon followed by electrophilic quenching at the resultant acylate oxygen atom. These reactions provide borylene acylates and alkoxy-/silyloxy-substituted alkylideneboranes, main-group analogues of the archetypal transition metal acylate and Fischer carbene families, respectively. When either the incoming electrophile or the boron center has a modest steric profile, the electrophile instead attacks at the boron atom, leading to carbene-stabilized acylboranes - boron analogues of the well-known transition metal acyl complexes. These results constitute faithful main-group replicas of a number of historical organometallic processes and pave the way to further advances in the field of main-group metallomimetics.
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Affiliation(s)
- Marcel Härterich
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
- Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Alexander Matler
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
- Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Rian D Dewhurst
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
- Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Andreas Sachs
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
- Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Kai Oppel
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
- Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Andreas Stoy
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
- Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Holger Braunschweig
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
- Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
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Wang L, Li J, Liu X, Zhang J, Zeng P, Song Y. Overestimation of 1O 2 role in N-doped carbon materials/peroxymonosulfate system: The misleading of furfuryl alcohol quenching effect. CHEMOSPHERE 2023; 324:138264. [PMID: 36858119 DOI: 10.1016/j.chemosphere.2023.138264] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 02/23/2023] [Accepted: 02/26/2023] [Indexed: 06/18/2023]
Abstract
Singlet oxygen (1O2) is frequently observed in persulfate-based advanced oxidation processes (PS-AOPs), however its significance in the removal of organic compounds is debatable. To evaluate the role of 1O2, some organic pollutants that have been proven to be successfully degraded by 1O2 in earlier research were selected as the targeted pollutants of this study. In the activation of peroxymonosulfate (PMS) using Co-BTC (a type of metal-organic framework)/melamine derived nitrogen-doped carbon material (Co-BTC/10MNC) as the catalyst, 1O2 and surface-bound SO4•- are discovered, however only surface-bound SO4•- was the dominant species. The degree of inhibition of furfuryl alcohol (FFA) on the removal of organics is reliant on the reaction rates of SO4•- and organics, rather than on the quenching impact of FFA on 1O2. The lower kSO4•- organics have, the easier it is for FFA to inhibit their removal. In short, the quenching effect of FFA is not solid evidence to identify 1O2. Besides, it is found that the influence of HCO3- is related to the second order reaction rate constant (kHCO3•) between HCO3• and organics, implying that the selective removal of some organics is due to that corresponding inorganic radicals (Cl•, NO3•, HCO3• or HPO4•-) have good ability to degrade these organics, rather than 1O2 as the key reactive oxygen species.
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Affiliation(s)
- Liangjie Wang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; College of Chemical and Environmental Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Juan Li
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Xinyao Liu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Jiali Zhang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Ping Zeng
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
| | - Yonghui Song
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
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43
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Liu M, Han X, Chen H, Peng Q, Huang H. A molecular descriptor of intramolecular noncovalent interaction for regulating optoelectronic properties of organic semiconductors. Nat Commun 2023; 14:2500. [PMID: 37127693 PMCID: PMC10151346 DOI: 10.1038/s41467-023-38078-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Accepted: 04/11/2023] [Indexed: 05/03/2023] Open
Abstract
In recent years, intramolecular noncovalent interaction has become an important means to modulate the optoelectronic performances of organic/polymeric semiconductors. However, it lacks a deep understanding and a direct quantitative relationship among the molecular geometric structure, strength of noncovalent interaction, and optoelectronic properties in organic/polymeric semiconductors. Herein, upon systematical theoretical calculations on 56 molecules with and without noncovalent interactions (X···Y, X = O, S, Se, Te; Y = C, F, O, S, Cl), we reveal the essence of the interactions and the dependence of its strength on the molecular geometry. Importantly, a descriptor S is established as a function of several basic geometric parameters to well characterize the noncovalent interaction energy, which exhibits a good inverse correlation with the reorganization energies of the photo-excited states or electron-pumped charged states in organic/polymeric semiconductors. In particular, the experimental 1H, 77Se, and 125Te NMR, the optical absorption and emission spectra, and single crystal structures of eight compounds fully confirm the theoretical predictions. This work provides a simple descriptor to characterize the strength of noncovalent intramolecular interactions, which is significant for molecular design and property prediction.
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Affiliation(s)
- Meihui Liu
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xiao Han
- College of Materials Science and Opto-Electronic Technology & CAS Center for Excellence in Topological Quantum Computation & Key Laboratory of Vacuum Physics, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Hao Chen
- College of Materials Science and Opto-Electronic Technology & CAS Center for Excellence in Topological Quantum Computation & Key Laboratory of Vacuum Physics, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Qian Peng
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
| | - Hui Huang
- College of Materials Science and Opto-Electronic Technology & CAS Center for Excellence in Topological Quantum Computation & Key Laboratory of Vacuum Physics, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
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44
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Liu L, Wang A, Hu J, Hou H, Liang S, Yang J. Peroxymonosulfate activated by natural porphyrin derivatives for rapid degradation of organic pollutants via singlet oxygen and high-valent iron-oxo species. CHEMOSPHERE 2023; 331:138783. [PMID: 37119928 DOI: 10.1016/j.chemosphere.2023.138783] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 03/31/2023] [Accepted: 04/24/2023] [Indexed: 05/06/2023]
Abstract
The activation of peroxymonosulfate (PMS) by sodium ferric chlorophyllin (SFC), a natural porphyrin derivative extracted from chlorophyll-rich substances, was systematically investigated for facile degradation of bisphenol A (BPA). SFC/PMS is capable of degrading 97.5% of BPA in the first 10 min with the initial BPA concentration of 20 mg/L and pH = 3, whereas conventional Fe2+/PMS could only remove 22.6% of BPA under identical conditions. It demonstrates a prominent flexibility to a broad pH range of 3-11 with complete pollutant degradation. A remarkable tolerance toward concomitant high concentration of inorganic anions (100 mM) was also observed, among which (bi)carbonates can even accelerate the degradation. The nonradical oxidation species, including high-valent iron-oxo porphyrin species and 1O2, are identified as dominant species. Particularly, the generation and participation of 1O2 in the reaction is evidenced by experimental and theoretical methods, which is vastly different from the previous study. The specific activation mechanism is unveiled by density functional theory (DFT) calculations and ab initio molecular dynamics (AIMD) simulations. The results shed light on effective PMS activation by iron (III) porphyrin and the proposed natural porphyrin derivative would be a promising candidate for efficient abatement of recalcitrant pollutants toward complicated aqueous media in wastewater treatment.
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Affiliation(s)
- Lu Liu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Technology Research Center of Water Supply Safety and Pollution Control, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China
| | - Anqi Wang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Technology Research Center of Water Supply Safety and Pollution Control, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China
| | - Jingping Hu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Technology Research Center of Water Supply Safety and Pollution Control, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China.
| | - Huijie Hou
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Technology Research Center of Water Supply Safety and Pollution Control, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China
| | - Sha Liang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Technology Research Center of Water Supply Safety and Pollution Control, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China
| | - Jiakuan Yang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; Hubei Provincial Engineering Technology Research Center of Water Supply Safety and Pollution Control, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China; State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, PR China
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45
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Richter WE. On the quest for a molecular vibration whose absolute intensity is described solely by fluctuations of atomic dipoles: Can we find it? SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 291:122321. [PMID: 36621029 DOI: 10.1016/j.saa.2023.122321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/30/2022] [Accepted: 01/02/2023] [Indexed: 06/17/2023]
Abstract
The conditions for a molecular vibration to be active in the infrared spectrum while its absolute intensity is described solely by fluctuations of atomic dipoles are presented. A quick recipe of features of such a system is presented, to guide the seek for it. If such a system can be found, it will then be proved that population analyses based solely on a point-charge approximation are unrealistic as they cannot properly describe this intensity, a real, measurable, unambiguous property.
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Affiliation(s)
- Wagner Eduardo Richter
- Department of Chemistry, Federal University of Technology - Paraná, 84.017-220, Ponta Grossa, PR, Brazil.
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46
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Li X, Feng A, Zu Y, Liu P, Han F. Experimental and Theoretical Study on Crown Ether-Appended-Fe(III) Porphyrin Complexes and Catalytic Oxidation Cyclohexene with O 2. Molecules 2023; 28:molecules28083452. [PMID: 37110685 PMCID: PMC10146806 DOI: 10.3390/molecules28083452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 03/30/2023] [Accepted: 04/05/2023] [Indexed: 04/29/2023] Open
Abstract
Modifying non-precious metal porphyrins at the meso-position is sufficient to further improve the ability to activate O2 and the selectivity of the corresponding redox products. In this study, a crown ether-appended Fe(III) porphyrin complex (FeTC4PCl) was formed by replacing Fe(III) porphyrin (FeTPPCl) at the meso-position. The reactions of FeTPPCl and FeTC4PCl catalysed by O2 oxidation of cyclohexene under different conditions were studied, and three main products, 2-cyclohexen-1-ol (1), 2-cyclohexen-1-one (2), and 7-oxabicyclo[4.1.0]heptane (3), were obtained. The effects of reaction temperature, reaction time, and the addition of axial coordination compounds on the reactions were investigated. The conversion of cyclohexene reached 94% at 70 °C after 12 h, and the selectivity toward product 1 was 73%. The geometrical structure optimization, molecular orbital energy level analysis, atomic charge, spin density, and density of orbital states analysis of FeTPPCl, FeTC4PCl, as well as the oxygenated complexes (Fe-O2)TCPPCl and (Fe-O2)TC4PCl formed after adsorption of O2, were carried out using the DFT method. The results of thermodynamic quantity variation with reaction temperature and Gibbs free energy variation were also analysed. Finally, based on experimental and theoretical analysis, the mechanism of the cyclohexene oxidation reaction with FeTC4PCl as a catalyst and O2 as an oxidant was deduced, and the reaction mechanism was obtained as a free radical chain reaction process.
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Affiliation(s)
- Xiaodong Li
- Institute of Physics & Optoelectronics Technology, Baoji University of Arts and Sciences, Baoji 721016, China
| | - Ailing Feng
- Institute of Physics & Optoelectronics Technology, Baoji University of Arts and Sciences, Baoji 721016, China
| | - Yanqing Zu
- Institute of Physics & Optoelectronics Technology, Baoji University of Arts and Sciences, Baoji 721016, China
| | - Peitao Liu
- Institute of Physics & Optoelectronics Technology, Baoji University of Arts and Sciences, Baoji 721016, China
| | - Fengbo Han
- Institute of Physics & Optoelectronics Technology, Baoji University of Arts and Sciences, Baoji 721016, China
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47
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Fu Y, Liu H, Tang BZ, Zhao Z. Realizing efficient blue and deep-blue delayed fluorescence materials with record-beating electroluminescence efficiencies of 43.4. Nat Commun 2023; 14:2019. [PMID: 37037820 PMCID: PMC10086064 DOI: 10.1038/s41467-023-37687-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 03/28/2023] [Indexed: 04/12/2023] Open
Abstract
As promising luminescent materials for organic light-emitting diodes (OLEDs), thermally activated delayed fluorescence materials are booming vigorously in recent years, but robust blue ones still remain challenging. Herein, we report three highly efficient blue and deep-blue delayed fluorescence materials comprised of a weak electron acceptor chromeno[3,2-c]carbazol-8(5H)-one with a rigid polycyclic structure and a weak electron donor spiro[acridine-9,9'-xanthene]. They hold distinguished merits of excellent photoluminescence quantum yields (99%), ultrahigh horizontal transition dipole ratios (93.6%), and fast radiative transition and reverse intersystem crossing, which furnish superb blue and deep-blue electroluminescence with Commission Internationale de I'Eclairage coordinates (CIEx,y) of (0.14, 0.18) and (0.14, 0.15) and record-beating external quantum efficiencies (ηexts) of 43.4% and 41.3%, respectively. Their efficiency roll-offs are successfully reduced by suppressing triplet-triplet and singlet-singlet annihilations. Moreover, high-performance deep-blue and green hyperfluorescence OLEDs are achieved by utilizing these materials as sensitizers for multi-resonance delayed fluorescence dopants, providing state-of-the-art ηexts of 32.5% (CIEx,y = 0.14, 0.10) and 37.6% (CIEx,y = 0.32, 0.64), respectively, as well as greatly advanced operational lifetimes. These splendid results can surely inspire the development of blue and deep-blue luminescent materials and devices.
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Affiliation(s)
- Yan Fu
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou, 510640, China
| | - Hao Liu
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou, 510640, China
| | - Ben Zhong Tang
- School of Science and Engineering, Shenzhen Institute of Aggregate Science and Technology, The Chinese University of Hong Kong, Shenzhen, Guangdong, 518172, China
| | - Zujin Zhao
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou, 510640, China.
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48
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Qian X, Chu F, Zhou W, Zheng Z, Chen X, Zhao Y. Design of Intramolecular Dihedral Angle between Electronic Donor and Acceptor in Thermally Activated Delayed Fluorescence Molecules. J Phys Chem Lett 2023; 14:3335-3342. [PMID: 36994861 DOI: 10.1021/acs.jpclett.3c00515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
In order to improve the exciton utilization efficiency (ηexc) of organic light-emitting materials, we addressed the ideal donor-acceptor dihedral angle (θD-A) in the TADF molecule by striking a balance between two photophysical processes. One is the conversion of triplet excitons into singlet excitons, and the other is the radiative process from a low-lying excited state to the ground state. Using a combination of first-principles calculations and molecular dynamics simulations, we investigated the impact of θD-A on the splitting energy and spin-orbit coupling between singlet and triplet excitons as well as the transition dipole moment for carbazole benzonitrile (CzBN) derivatives. By comparison with the reverse intersystem crossing rate (krISC), fluorescence emission rate (kr), and ηexc, we proposed a potential highest ηexc (of 94.4%) with the ideal θD-A of 77° for blue light CzBN derivatives; the calculated results have a good agreement with experimental measurement. The structure-efficiency physical connection between the molecular structure (θD-A) and efficiency provided an ideal parameter for a potential candidate for blue TADF-OLED materials.
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Affiliation(s)
- Xin Qian
- Faculty of Materials and Manufacturing, Faculty of Information Technology, Beijing University of Technology, Beijing 100124, P. R. China
| | - Feihong Chu
- Faculty of Materials and Manufacturing, Faculty of Information Technology, Beijing University of Technology, Beijing 100124, P. R. China
| | - Wencai Zhou
- Faculty of Materials and Manufacturing, Faculty of Information Technology, Beijing University of Technology, Beijing 100124, P. R. China
| | - Zilong Zheng
- Faculty of Materials and Manufacturing, Faculty of Information Technology, Beijing University of Technology, Beijing 100124, P. R. China
| | - Xiaoqing Chen
- Faculty of Materials and Manufacturing, Faculty of Information Technology, Beijing University of Technology, Beijing 100124, P. R. China
| | - Yi Zhao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Fujian Provincial Key Lab of Theoretical and Computational Chemistry, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
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49
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Deng L, Zhang C, Li B, Fu J, Zhang Z, Li S, Zhao X, Su Z, Hu C, Yu Z. Photo-induced defluorination acyl fluoride exchange as a fluorogenic photo-click reaction for photo-affinity labeling. Chem Sci 2023; 14:3630-3641. [PMID: 37006673 PMCID: PMC10056068 DOI: 10.1039/d2sc04636a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 02/24/2023] [Indexed: 02/26/2023] Open
Abstract
Photo-click chemistry has emerged as a powerful tool for revolutionizing bioconjugation technologies in pharmacological and various biomimetic applications. However, enriching the photo-click reactions to expand the bioconjugation toolkit remains challenging, especially when focusing on spatiotemporal control endowed by light activation. Herein, we describe a photo-induced defluorination acyl fluoride exchange (photo-DAFEx) as a novel type of photo-click reaction that is mediated through acyl fluorides produced by the photo-defluorination of m-trifluoromethylaniline to covalently conjugate with primary/secondary amines and thiols in an aqueous environment. (TD)-DFT calculations, together with experimental discovery, indicate that the m-NH2PhF2C(sp3)-F bond in the excited triplet state is cleaved by water molecules, which is key to inducing defluorination. Intriguingly, the benzoyl amide linkages built by this photo-click reaction exhibited a satisfactory fluorogenic performance, which allowed visualization of its formation in situ. Accordingly, this photo-controlled covalent strategy was exploited not only for the decoration of small molecules, peptide cyclization and functionalization of proteins in vitro, but also for designing photo-affinity probes targeting endogenous carbonic anhydrase II (hCA-II) in living cells.
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Affiliation(s)
- Lijun Deng
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University 29 Wangjiang Road Chengdu 610064 P. R. China
| | - Cefei Zhang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University 29 Wangjiang Road Chengdu 610064 P. R. China
| | - Baolin Li
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University 29 Wangjiang Road Chengdu 610064 P. R. China
| | - Jielin Fu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University 29 Wangjiang Road Chengdu 610064 P. R. China
| | - Zhong Zhang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University 29 Wangjiang Road Chengdu 610064 P. R. China
| | - Sitong Li
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University 29 Wangjiang Road Chengdu 610064 P. R. China
| | - Xiaohu Zhao
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University 29 Wangjiang Road Chengdu 610064 P. R. China
| | - Zhishan Su
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University 29 Wangjiang Road Chengdu 610064 P. R. China
| | - Changwei Hu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University 29 Wangjiang Road Chengdu 610064 P. R. China
| | - Zhipeng Yu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University 29 Wangjiang Road Chengdu 610064 P. R. China
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50
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Zhao J, Zhu ZW, Zhao DX, Yang ZZ. Atomic charges in molecules defined by molecular real space partition into atomic subspaces. Phys Chem Chem Phys 2023; 25:9020-9030. [PMID: 36928882 DOI: 10.1039/d2cp05428k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/10/2023]
Abstract
Atomic charge (AC), which is the charge distribution of a molecule, is an important property that is closely associated with structures, reactivities, and intra- and inter-molecular interactions among molecules. Several theoretical models or methods can be used to obtain the magnitudes of AC with different characteristics. These models can be classified into fuzzy-atoms models and models partitioning a molecule into individual atoms with sharp boundaries. The first category includes Mulliken, natural population analysis (NPA), Hirshfeld, Merz-Kollman-Singh (MK), CHELPG, the electronegativity equalization method (EEM), the atom-bond electronegativity equalization method (ABEEM), and atomic polar tensor (APT). The second category is derived from quantum chemical topology (QCT) and includes the quantum theory of atoms in molecules (QTAIM) and QCT analysis based on the potential acting on one electron in a molecule (PAEMQCT). Herein, after giving a bird's-eye view of the population methods of the first category, we specifically describe some features of the second category. We only present the basic framework of QCT for obtaining ACs from QTAIM and PAEMQCT and show their important characteristics. QCT establishes the basis of the following chemical concept: a molecule is spatially partitioned into individual atoms with sharp boundaries. The ACs from QTAIM are close to the atomic valence in chemistry, and ACs from PAEMQCT may be practically suitable for modeling intra- and inter-molecular interactions.
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Affiliation(s)
- Jian Zhao
- School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, Liaoning province, 116029, China. .,State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning province, 116023, China
| | - Zun-Wei Zhu
- School of Materials Science and Engineering, Anyang Institute of Technology, Anyang, Henan province, 455000, China
| | - Dong-Xia Zhao
- School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, Liaoning province, 116029, China.
| | - Zhong-Zhi Yang
- School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, Liaoning province, 116029, China.
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