401
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Silva WGDP, Poonia T, van Wijngaarden J. Exploring the non-covalent interactions behind the formation of amine–water complexes: the case of N-allylmethylamine monohydrate. Phys Chem Chem Phys 2021; 23:7368-7375. [DOI: 10.1039/d1cp00420d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Rotational spectroscopy and quantum chemical studies reveal the effects of hydrogen bonding with water on the conformer equilibrium of N-allylmethylamine.
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Affiliation(s)
| | - Tamanna Poonia
- Department of Chemistry
- University of Manitoba
- Winnipeg
- Canada
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402
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Ebenezer C, Vijay Solomon R. Tailoring the selectivity of phenanthroline derivatives for the partitioning of trivalent Am/Eu ions – a relativistic DFT study. Inorg Chem Front 2021. [DOI: 10.1039/d1qi00097g] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Preferential binding of actinides over lanthanides using tailored phenanthroline derivative ligands through relativistic DFT calculations.
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Affiliation(s)
- Cheriyan Ebenezer
- Department of Chemistry
- Madras Christian College (Autonomous)
- (Affiliated to the University of Madras)
- Chennai – 600 059
- India
| | - Rajadurai Vijay Solomon
- Department of Chemistry
- Madras Christian College (Autonomous)
- (Affiliated to the University of Madras)
- Chennai – 600 059
- India
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403
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Xu X, Guan Y. Investigating the Complexation and Release Behaviors of Iodine in Poly(vinylpyrrolidone)-Iodine Systems through Experimental and Computational Approaches. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c04766] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Xiang Xu
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yong Guan
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
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404
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Nanayakkara S, Tao Y, Kraka E. Comment on "Exploring nature and predicting strength of hydrogen bonds: A correlation analysis between atoms-in-molecules descriptors, binding energies, and energy components of symmetry-adapted perturbation theory". J Comput Chem 2020; 42:516-521. [PMID: 33368440 DOI: 10.1002/jcc.26475] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 09/29/2020] [Accepted: 11/29/2020] [Indexed: 01/26/2023]
Abstract
We evaluate the correlation between binding energy (BE) and electron density ρ(r) at the bond critical point for 28 neutral hydrogen bonds, recently reported by Emamian and co-workers (J. Comput. Chem., 2019, 40, 2868). As an efficient tool, we use local stretching force constant k HB a derived from the local vibrational mode theory of Konkoli and Cremer. We compare the physical nature of BE versus k HB a , and provide an important explanation for cases with significant deviation in the BE- k HB a relation as well as in the BE-ρ(r) correlation. We also show that care has to be taken when different hydrogen bond strength measures are compared. The BE is a cumulative hydrogen bond strength measure while k HB a is a local measure of hydrogen bond strength covering different aspects of bonding. A simplified and unified description of hydrogen bonding is not always possible and needs an in-depth understanding of the systems involved.
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Affiliation(s)
| | - Yunwen Tao
- Department of Chemistry, Southern Methodist University, Dallas, Texas, USA
| | - Elfi Kraka
- Department of Chemistry, Southern Methodist University, Dallas, Texas, USA
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405
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Medvedev AG, Churakov AV, Prikhodchenko PV, Lev O, Vener MV. Crystalline Peroxosolvates: Nature of the Coformer, Hydrogen-Bonded Networks and Clusters, Intermolecular Interactions. Molecules 2020; 26:E26. [PMID: 33374602 PMCID: PMC7793138 DOI: 10.3390/molecules26010026] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 12/19/2020] [Accepted: 12/19/2020] [Indexed: 01/22/2023] Open
Abstract
Despite the technological importance of urea perhydrate (percarbamide) and sodium percarbonate, and the growing technological attention to solid forms of peroxide, fewer than 45 peroxosolvates were known by 2000. However, recent advances in X-ray diffractometers more than tripled the number of structurally characterized peroxosolvates over the last 20 years, and even more so, allowed energetic interpretation and gleaning deeper insight into peroxosolvate stability. To date, 134 crystalline peroxosolvates have been structurally resolved providing sufficient insight to justify a first review article on the subject. In the first chapter of the review, a comprehensive analysis of the structural databases is carried out revealing the nature of the co-former in crystalline peroxosolvates. In the majority of cases, the coformers can be classified into three groups: (1) salts of inorganic and carboxylic acids; (2) amino acids, peptides, and related zwitterions; and (3) molecular compounds with a lone electron pair on nitrogen and/or oxygen atoms. The second chapter of the review is devoted to H-bonding in peroxosolvates. The database search and energy statistics revealed the importance of intermolecular hydrogen bonds (H-bonds) which play a structure-directing role in the considered crystals. H2O2 always forms two H-bonds as a proton donor, the energy of which is higher than the energy of analogous H-bonds existing in isostructural crystalline hydrates. This phenomenon is due to the higher acidity of H2O2 compared to water and the conformational mobility of H2O2. The dihedral angle H-O-O-H varies from 20 to 180° in crystalline peroxosolvates. As a result, infinite H-bonded 1D chain clusters are formed, consisting of H2O2 molecules, H2O2 and water molecules, and H2O2 and halogen anions. H2O2 can form up to four H-bonds as a proton acceptor. The third chapter of the review is devoted to energetic computations and in particular density functional theory with periodic boundary conditions. The approaches are considered in detail, allowing one to obtain the H-bond energies in crystals. DFT computations provide deeper insight into the stability of peroxosolvates and explain why percarbamide and sodium percarbonate are stable to H2O2/H2O isomorphic transformations. The review ends with a description of the main modern trends in the synthesis of crystalline peroxosolvates, in particular, the production of peroxosolvates of high-energy compounds and mixed pharmaceutical forms with antiseptic and analgesic effects.
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Affiliation(s)
- Alexander G. Medvedev
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii Prosp. 31, 119991 Moscow, Russia; (A.G.M.); (A.V.C.); (P.V.P.)
| | - Andrei V. Churakov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii Prosp. 31, 119991 Moscow, Russia; (A.G.M.); (A.V.C.); (P.V.P.)
| | - Petr V. Prikhodchenko
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii Prosp. 31, 119991 Moscow, Russia; (A.G.M.); (A.V.C.); (P.V.P.)
| | - Ovadia Lev
- The Casali Center of Applied Chemistry, The Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Mikhail V. Vener
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii Prosp. 31, 119991 Moscow, Russia; (A.G.M.); (A.V.C.); (P.V.P.)
- Department of Quantum Chemistry, Mendeleev University of Chemical Technology, Miusskaya Square 9, 125047 Moscow, Russia
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406
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Han J, Wang L, Zhang H, Su Q, Zhou X, Liu S. Determinant Factor for Thermodynamic Stability of Sulfuric Acid-Amine Complexes. J Phys Chem A 2020; 124:10246-10257. [PMID: 33238705 DOI: 10.1021/acs.jpca.0c07908] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Atmospheric amines are thought to play significant roles in the nucleation of sulfuric acid-mediated aerosol particles. Their enhancing effects on the stabilization of the related complexes have formerly been correlated with the amine base strength, but there are a few exceptions reported. In this work, the influence of seven alkylamines on the thermodynamic stability of sulfuric acid-amine complexes has been theoretically investigated, e.g., ethylamine, propylamine, isopropylamine, tert-butylamine, dimethylamine, ethylmethylamine, and trimethylamine. For all primary and secondary amine-mediated complexes, a dual hydrogen bond configuration is generally suggested in the most stable isomer. The stabilization of this special structure predicted by the electrostatic potential distribution on the molecular surface of amines exactly agrees with the base strength sequence, providing crucial evidence for the previous deduction of correlation between the base strength and the enhancing effect. Meanwhile, the considerable van der Waals interactions are found between the free hydroxyl of sulfuric acid and the β-methyl group of amine, resulting in the extra stability for sulfuric acid-dimethylamine and sulfuric acid-ethylmethylamine complexes. Therefore, the electrostatic potential distribution of amines is the essential determinant factor for the thermodynamic stability of the relevant complexes. Our conclusions provide new insight into a way to evaluate the enhancing abilities of amines in aerosol particle nucleation.
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Affiliation(s)
- Jia Han
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Lei Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Hanhui Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Quyan Su
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Xiaoguo Zhou
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Shilin Liu
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
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407
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Banerjee A, Banerjee S, Gómez García CJ, Benmansour S, Chattopadhyay S. Field-induced single molecule magnet behavior of a dinuclear cobalt(II) complex: a combined experimental and theoretical study. Dalton Trans 2020; 49:16778-16790. [PMID: 33174540 DOI: 10.1039/d0dt02158j] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two dinuclear cobalt(ii) complexes, [(dmso)CoIIL1(μ-(m-NO2)C6H4COO)CoII(NCS)] (1) and [(dmso)CoIIL2(μ-(m-NO2)C6H4COO)CoII(NCS)] (2) [dmso = dimethylsulfoxide, H2L1 = (2,2-dimethyl-1,3-propanediyl)bis(iminomethylene)bis(6-methoxyphenol) and H2L2 = (2,2-dimethyl-1,3-propanediyl)bis(iminomethylene)bis(6-ethoxyphenol)] have been synthesized and structurally characterized by single-crystal X-ray diffraction, magnetic-susceptibility measurements and various spectroscopic techniques. Each complex contains a cobalt(ii) center with a slightly distorted octahedral geometry and a second cobalt(ii) center with a distorted trigonal prismatic one. To obtain insight into the physical nature of weak non-covalent interactions, we have extensively used the Bader's quantum theory of atoms-in-molecules (QTAIM). In addition, the non-covalent interaction reduced density gradient (NCI-RDG) methods established the presence of such non-covalent intermolecular interactions. Variable temperature magnetic susceptibility measurements show that both cobalt centers in each complex are in the high spin state (S = 3/2) and both complexes show weak ferromagnetic couplings through the double phenoxido bridges (J = 3.36(3) cm-1 in 1 and 4.56(2) cm-1 in 2). The magnetic properties of both complexes can be fitted to a Co(ii) dimer model including similar orbital reduction factors (α = -0.94(1) for 1 and -0.85(1) for 2) although different zero field splitting parameters D(1) = 11.0(4) cm-1 and D(2) = 19.5(4) cm-1 in 1 and D(1) = 8.2(4) cm-1 and D(2) = -1.3(4) cm-1 in 2. AC magnetic measurements reveal that the CoII2 unit in complex 2 exhibits field-induced slow relaxation of the magnetization at low temperatures and high frequencies.
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Affiliation(s)
- Abhisek Banerjee
- Department of Chemistry, Inorganic Section, Jadavpur University, Kolkata - 700032, India.
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408
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Xia Y, Zhang Y, Su Q, Dong K. Theoretical Insights into the Effect of Cations, Anions, and Water on Fixation of CO 2 Catalyzed by Different Ionic Liquids. CHEMSUSCHEM 2020; 13:6391-6400. [PMID: 32729650 DOI: 10.1002/cssc.202001447] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 07/28/2020] [Indexed: 06/11/2023]
Abstract
Chemical fixation of CO2 is an efficient means for decreasing amount of CO2 in the atmosphere. One of promising technologies is the cycloaddition of CO2 with epoxides to synthesize cyclic carbonates. In this reaction, ionic liquid (IL) catalysts show versatile and unique advantages. However, the reaction mechanism using ILs is not clear. In this work, a detailed theoretical investigation was performed by DFT calculations. The energetic profile shows that the reaction consists of three steps, with the ring-opening step being the rate-determining step. Based on the results, effects of cations, anions and water were calculated. Cations show strong hydrogen bonding interactions with epoxides, which decreases the energy barrier of the ring-opening step, indicating that hydrogen bonds play a positive role in promoting the reaction. The effect of anions was evaluated by nucleophilicity index (NNu ); anions with a larger NNu (stronger nucleophilicity) value show lower energy barriers. The influence of water was investigated by implicit and explicit models. Compared with the solvent-free case, water as an implicit solvent decreases the energy barriers through polarization with epoxides. In the explicit solvent model, the water molecules form new hydrogen bonds with epoxides and cations, which can efficiently reduce the energy barriers. The result indicates that there is a new synergic catalytic mechanism, in which the water acts not only as solvent but also as a catalyst in the reaction. Supporting experiments further confirm the calculation results.
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Affiliation(s)
- Yangfeng Xia
- Beijing Key Laboratory of ionic liquids Clean Process, Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100049, P. R. China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yanqiang Zhang
- Beijing Key Laboratory of ionic liquids Clean Process, Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Qian Su
- Beijing Key Laboratory of ionic liquids Clean Process, Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Kun Dong
- Beijing Key Laboratory of ionic liquids Clean Process, Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100049, P. R. China
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409
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Fianchini M, Llorens L, Pericàs MA. Separating Enthalpic, Configurational, and Solvation Entropic Components in Host-Guest Binding: Application to Cucurbit[7]uril Complexes through a Full In Silico Approach via Water Nanodroplets. J Phys Chem B 2020; 124:10486-10499. [PMID: 33166142 DOI: 10.1021/acs.jpcb.0c08507] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Cucurbiturils are a family of supramolecular hosts obtained by condensation of glycoluril and formaldehyde. Cucurbit[7]uril, CB[7], is the most prominent member of the family for its biomolecular interest, arising from its mild solubility in water and for its strong binding with a large variety of guests containing nonpolar fragments such as adamantanes and ferrocene. For instance, CB[7] encapsulates diamantane diammonium iodide with an attomolar dissociation constant, a value unmatched even in natural encapsulation processes. Computational chemistry has been extensively employed to describe the enthalpic-entropic compensation principle of the molecular recognition process of cucurbituril hosts, but the synergistic contribution of experimental data is required for accurate results to be obtained. This paper proposes the first fully theoretical model able to reconcile the calculated thermodynamics of the complexation process with the experimental data obtained by calorimetry (ITC) for cucurbit[7]uril. The model allows the isolation and estimation of all of the enthalpic and entropic contributions coming from solute and solvent alike to the whole host-guest binding event and enables the straightforward calculation of the contribution of the solvation entropy to the binding.
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Affiliation(s)
- Mauro Fianchini
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avgda Països Catalans, 16, 43007 Tarragona, Catalonia, Spain
| | - Lluis Llorens
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avgda Països Catalans, 16, 43007 Tarragona, Catalonia, Spain.,Departament de Química Inorgànica i Orgànica, Universitat de Barcelona (UB), 08028 Barcelona, Catalonia, Spain
| | - Miquel A Pericàs
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avgda Països Catalans, 16, 43007 Tarragona, Catalonia, Spain.,Departament de Química Inorgànica i Orgànica, Universitat de Barcelona (UB), 08028 Barcelona, Catalonia, Spain
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410
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Zhang YM, Yang QY, Ma XQ, Dong HQ, Zhang YF, Guan WL, Yao H, Wei TB, Lin Q. N-(2-Aminoethyl)-2-(hexylthio) Acetamide-Functionalized Pillar[5]arene for the Selective Detection of l-Trp through Guest-Adaptive Multisupramolecular Interactions. J Phys Chem A 2020; 124:9811-9817. [DOI: 10.1021/acs.jpca.0c08367] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- You-Ming Zhang
- College of Chemistry and Chemical Engineering, Northwest Normal University, No. 967 Anning East Road, Anning District, Lanzhou, Gansu 730070, China
- Gansu Natural Energy Research Institute, No. 20 Renmin Road, Chengguan District, Lanzhou, Gansu 730046, China
| | - Qing-Yu Yang
- College of Chemistry and Chemical Engineering, Northwest Normal University, No. 967 Anning East Road, Anning District, Lanzhou, Gansu 730070, China
| | - Xiao-Qiang Ma
- College of Chemistry and Chemical Engineering, Northwest Normal University, No. 967 Anning East Road, Anning District, Lanzhou, Gansu 730070, China
| | - Hong-Qiang Dong
- College of Chemistry and Chemical Engineering, Northwest Normal University, No. 967 Anning East Road, Anning District, Lanzhou, Gansu 730070, China
| | - Yun-Fei Zhang
- College of Chemistry and Chemical Engineering, Northwest Normal University, No. 967 Anning East Road, Anning District, Lanzhou, Gansu 730070, China
| | - Wen-Li Guan
- College of Chemistry and Chemical Engineering, Northwest Normal University, No. 967 Anning East Road, Anning District, Lanzhou, Gansu 730070, China
| | - Hong Yao
- College of Chemistry and Chemical Engineering, Northwest Normal University, No. 967 Anning East Road, Anning District, Lanzhou, Gansu 730070, China
| | - Tai-Bao Wei
- College of Chemistry and Chemical Engineering, Northwest Normal University, No. 967 Anning East Road, Anning District, Lanzhou, Gansu 730070, China
| | - Qi Lin
- College of Chemistry and Chemical Engineering, Northwest Normal University, No. 967 Anning East Road, Anning District, Lanzhou, Gansu 730070, China
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411
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Mu T, Xi Y, Huang M, Chen G. Search for optimal monomers for fabricating active layers in thin-film composite osmosis membranes by conceptual density functional theory. J Mol Model 2020; 26:334. [PMID: 33156445 DOI: 10.1007/s00894-020-04578-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Accepted: 10/18/2020] [Indexed: 11/25/2022]
Abstract
This paper presented an effective way to select monomers to fabricate active layers for the thin-film composite (TFC) membrane at the molecular level. Five types of diamine monomers and six acid chloride monomers were firstly selected by a conformer search process. Then, the conceptual density functional theory (CDFT) method was adopted to examine the properties of these monomers. A few different molecular properties were calculated, including relative energy, hydrogen bond, global/local/difference local softness, hardness, chemical potential, and electrophilicity index. Similarly, polyamides that were the productions of interfacial polymerization reaction were also analyzed by CDFT. Our results showed that the mixture of trimesoyl chloride (TMC) and m-phenylenediamine (MPD) for the interfacial polymerization was ideal synthetic materials to fabricate the active layer of TFC membranes. Graphical abstract Polyamides synthesis by interfacial polymerization.
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Affiliation(s)
- Tianwei Mu
- College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai, 201620, China
| | - Yu Xi
- College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai, 201620, China.,Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, 330063, China
| | - Manhong Huang
- College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai, 201620, China.
| | - Gang Chen
- College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai, 201620, China
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412
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Zhao Q. Mutual influence of tetrel and halogen bonds between XCN (X=Cl, Br) and 4-TF3-pyridine (T=C, Si, Ge). J Mol Model 2020; 26:329. [DOI: 10.1007/s00894-020-04596-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Accepted: 10/28/2020] [Indexed: 12/01/2022]
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413
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Zhang M, Zhu X. Computational investigation of flavonol-based GLP-1R agonists using DFT calculations and molecular docking. COMPUT THEOR CHEM 2020. [DOI: 10.1016/j.comptc.2020.113005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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414
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Wu Z, Li D, Yan G, Wang H, Liu S, Yang J, Zhang G. Heat-resistant and shape-memory metallo-supramolecules with simultaneously switchable fluorescence behavior supported by tridentate N3 group. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122886] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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415
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van der Waals potential: an important complement to molecular electrostatic potential in studying intermolecular interactions. J Mol Model 2020; 26:315. [PMID: 33098007 DOI: 10.1007/s00894-020-04577-0] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 10/18/2020] [Indexed: 01/18/2023]
Abstract
Electrostatics and van der Waals (vdW) interactions are two major components of intermolecular weak interactions. Electrostatic potential has been a very popular function in revealing electrostatic interaction between the system under study and other species, while the role of vdW potential was less recognized and has long been ignored. In this paper, we explicitly present definition of vdW potential, describe its implementation details, and demonstrate its important practical values by several examples. We hope this work can arouse researchers' attention to the vdW potential and promote its application in the studies of weak interactions. Calculation, visualization, and quantitative analysis of the vdW potential have been supported by our freely available code Multiwfn ( http://sobereva.com/multiwfn ).
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416
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Yang QY, Zhang YM, Ma XQ, Dong HQ, Zhang YF, Guan WL, Yao H, Wei TB, Lin Q. A pillar[5]arene-based fluorescent sensor for sensitive detection of L-Met through a dual-site collaborative mechanism. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 240:118569. [PMID: 32526401 DOI: 10.1016/j.saa.2020.118569] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 05/28/2020] [Accepted: 05/29/2020] [Indexed: 06/11/2023]
Abstract
L-Methionine (L-Met) is one of the essential amino acids in human health, efficiently detect L-Met is a significant issue. Herein, a concept "dual-site collaborative recognition" had been successfully introduced into the design and achieved high selective and sensitive recognition of L-Met. In order to realize the "dual-site collaborative recognition", we rationally designed and synthesized an ester functionalized pillar[5]arene-based fluorescent sensor (SP5). And it shows blue Aggregation-induced emission (AIE) fluorescence. In the SP5, the pillar[5]arene group act as C-H···π interactions site, and ester group serve as multi hydrogen bonding acceptor. Interestingly, the SP5 exhibited high selectivity and sensitivity (2.84 × 10-8 M) towards L-Met based on the collaboration of electron-rich cavernous pillar[5]arene group and ester group through C-H···π and H-bond interactions, respectively. This "dual-site collaborative recognition" mechanism has been investigated by 1H NMR, ESI-MS and theoretical calculation including frontier orbital (HOMO and LUMO), electrostatic potential (ESP) and the noncovalent interaction (NCI). These theoretical calculations not only support the proposed host-guest recognition mechanism, but also provided visualized information on the "dual-site collaborative recognition" mode. Furthermore, the concept "dual-site collaborative recognition" is an effective strategy for easily detecting biological molecules.
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Affiliation(s)
- Qing-Yu Yang
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - You-Ming Zhang
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China; Gansu Natural Energy Research Institute, Lanzhou, Gansu 730046, China.
| | - Xiao-Qiang Ma
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Hong-Qiang Dong
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Yun-Fei Zhang
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Wen-Li Guan
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Hong Yao
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Tai-Bao Wei
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Qi Lin
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China.
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417
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Abstract
The fundamental underpinnings of noncovalent bonds are presented, focusing on the σ-hole interactions that are closely related to the H-bond. Different means of assessing their strength and the factors that control it are discussed. The establishment of a noncovalent bond is monitored as the two subunits are brought together, allowing the electrostatic, charge redistribution, and other effects to slowly take hold. Methods are discussed that permit prediction as to which site an approaching nucleophile will be drawn, and the maximum number of bonds around a central atom in its normal or hypervalent states is assessed. The manner in which a pair of anions can be held together despite an overall Coulombic repulsion is explained. The possibility that first-row atoms can participate in such bonds is discussed, along with the introduction of a tetrel analog of the dihydrogen bond.
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Affiliation(s)
- Steve Scheiner
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, USA
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418
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Hou X, Ren Y, Fu F, Tian X. Doping atom to tune electronic characteristics and adsorption of cyclo[18] carbons: A theoretical study. COMPUT THEOR CHEM 2020. [DOI: 10.1016/j.comptc.2020.112922] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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419
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Liu Y, Li J, Wang G, Zu B, Dou X. One-Step Instantaneous Detection of Multiple Military and Improvised Explosives Facilitated by Colorimetric Reagent Design. Anal Chem 2020; 92:13980-13988. [PMID: 32938181 DOI: 10.1021/acs.analchem.0c02893] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Although colorimetric detection based on reagents has been widely used in the fields of practical trace analysis, its versatility for detecting multitargets remains the most challenging problem. As a proof of concept, a general colorimetric reagent based on potassium isopropanol (C3H7KO) and dimethyl sulfoxide for one-step instantaneous detection and discrimination of typical military and improvised explosives was designed. Vivid colors from none to purple red, blue green, yellow green, and green were shown, respectively, when detecting 2,4,6-trinitrotoluene (TNT), 2,4-dinitrotoluene (DNT), elemental sulfur (S), and potassium permanganate (KMnO4). The unique design including the specific nucleophilic addition reaction and the base-catalyzed oxidation-induced electron transfer ensures perfect selectivity even upon facing more than 20 interferents. It is further experimentally demonstrated that the confinement effect introduced by Tween-20 plays an essential role in enhancing the color signal on the surface and thus boosts the detection performance even with a mass as low as 1.45 ng. The applicability of this versatile colorimetric reagent was further verified by integrating the reagent onto paper strips for the in-field identification of TNT, DNT, S, and KMnO4 with the help of a portable smartphone-based microscope apparatus, and a practical detection mass of 10.3 ng could be realized. We expect the present colorimetric reagent design strategy would pave a way for one-step instantaneous visual detection toward trace multianalytes.
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Affiliation(s)
- Yong Liu
- Xinjiang Key Laboratory of Explosives Safety Science, Xinjiang Technical Institute of Physics and Chemistry; Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jiguang Li
- Xinjiang Key Laboratory of Explosives Safety Science, Xinjiang Technical Institute of Physics and Chemistry; Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guangfa Wang
- Xinjiang Key Laboratory of Explosives Safety Science, Xinjiang Technical Institute of Physics and Chemistry; Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Baiyi Zu
- Xinjiang Key Laboratory of Explosives Safety Science, Xinjiang Technical Institute of Physics and Chemistry; Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xincun Dou
- Xinjiang Key Laboratory of Explosives Safety Science, Xinjiang Technical Institute of Physics and Chemistry; Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
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420
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Hou X, Ren Y, Fu F. A density functional theory study on the electronic and adsorption characteristics of cyclo M 9N 9 (M = B and Al). J Mol Model 2020; 26:260. [PMID: 32897425 DOI: 10.1007/s00894-020-04520-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 08/26/2020] [Indexed: 11/26/2022]
Abstract
On the basis of experimental and theoretical calculations conducted for cyclo C18, we predicted two novel inorganic cyclo M9N9 (M = B and Al) molecules. Because of the significant difference in electronegativity between M and N atoms, M-N bonds were ionic. Furthermore, the interaction of cyclo M9N9 with cyclopropylpiperazine (CPPP) was investigated. In cyclo M9N9, each M atom could adsorb one CPPP molecule. The CPPP molecules exhibited a preference to remain outside cyclo M9N9 molecules. Depending on the structural characteristics of CPPP molecules, the exciting part is that up to four CPPP molecules could be adsorbed on the exterior surface of cyclo M9N9. We calculated adsorption energies and analyzed the main structural parameters in the process. The research results indicated that adsorption on cyclo Al9N9 was energetically more favorable than that on cyclo B9N9. The cyclo M9N9 have considerable potential in the future. Graphical abstract.
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Affiliation(s)
- Xiufang Hou
- Laboratory of Analytical Technology and Detection, Shaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shaanxi, China.
| | - Yuxin Ren
- Laboratory of Analytical Technology and Detection, Shaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shaanxi, China
| | - Feng Fu
- Laboratory of Analytical Technology and Detection, Shaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shaanxi, China
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421
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Modulating electrolyte structure for ultralow temperature aqueous zinc batteries. Nat Commun 2020; 11:4463. [PMID: 32901045 PMCID: PMC7479594 DOI: 10.1038/s41467-020-18284-0] [Citation(s) in RCA: 199] [Impact Index Per Article: 49.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 08/10/2020] [Indexed: 11/10/2022] Open
Abstract
Rechargeable aqueous batteries are an up-and-coming system for potential large-scale energy storage due to their high safety and low cost. However, the freeze of aqueous electrolyte limits the low-temperature operation of such batteries. Here, we report the breakage of original hydrogen-bond network in ZnCl2 solution by modulating electrolyte structure, and thus suppressing the freeze of water and depressing the solid-liquid transition temperature of the aqueous electrolyte from 0 to –114 °C. This ZnCl2-based low-temperature electrolyte renders polyaniline||Zn batteries available to operate in an ultra-wide temperature range from –90 to +60 °C, which covers the earth surface temperature in record. Such polyaniline||Zn batteries are robust at –70 °C (84.9 mA h g−1) and stable during over 2000 cycles with ~100% capacity retention. This work significantly provides an effective strategy to propel low-temperature aqueous batteries via tuning the electrolyte structure and widens the application range of temperature adaptation of aqueous batteries. Rechargeable aqueous batteries are promising for potential large-scale energy storage due to their high safety and low cost. Here the authors analyse a zinc chloride based low-temperature electrolyte for improving practicability of the aqueous batteries.
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422
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Green Synthesis, SC-XRD, Non-Covalent Interactive Potential and Electronic Communication via DFT Exploration of Pyridine-Based Hydrazone. CRYSTALS 2020. [DOI: 10.3390/cryst10090778] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Ultrasound-based synthesis at room temperature produces valuable compounds greener and safer than most other methods. This study presents the sonochemical fabrication and characterization of a pyridine-based halogenated hydrazone, (E)-2-((6-chloropyridin-2-yl)oxy)-N′-(2-hydroxybenzylidene) acetohydrazide (HBPAH). The NMR spectroscopic technique was used to determine the structure, while SC-XRD confirmed its crystalline nature. Our structural studies revealed that strong, inter-molecular attractive forces stabilize this crystalline organic compound. Moreover, the compound was optimized at the B3LYP/6-311G(d,p) level using the Crystallographic Information File (CIF). Natural bonding orbital (NBO) and natural population analysis (NPA) were performed at the same level using optimized geometry. Time-dependent density functional theory (DFT) was performed at the B3LYP/6-311G (d,p) method to calculate the frontier molecular orbitals (FMOs) and molecular electrostatic potential (MEP). The global reactivity descriptors were determined using HOMO and LUMO energy gaps. Theoretical calculations based on the Quantum Theory of Atoms in Molecules (QT-AIM) and Hirshfeld analyses identified the non-covalent and covalent interactions of the HBPAH compound. Consequently, QT-AIM and Hirshfeld analyses agree with experimental results.
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423
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Tsai CC, Sandford C, Wu T, Chen B, Sigman MS, Toste FD. Enantioselective Intramolecular Allylic Substitution via Synergistic Palladium/Chiral Phosphoric Acid Catalysis: Insight into Stereoinduction through Statistical Modeling. Angew Chem Int Ed Engl 2020; 59:14647-14655. [PMID: 32453890 PMCID: PMC7686151 DOI: 10.1002/anie.202006237] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 05/25/2020] [Indexed: 11/05/2022]
Abstract
The mode of asymmetric induction in an enantioselective intramolecular allylic substitution reaction catalyzed by a combination of palladium and a chiral phosphoric acid was investigated by a combined experimental and statistical modeling approach. Experiments to probe nonlinear effects, the reactivity of deuterium-labeled substrates, and control experiments revealed that nucleophilic attack to the π-allylpalladium intermediate is the enantio-determining step, in which the chiral phosphate anion is involved in stereoinduction. Using multivariable linear regression analysis, we determined that multiple noncovalent interactions with the chiral environment of the phosphate anion are integral to enantiocontrol in the transition state. The synthetic protocol to form chiral pyrrolidines was further applied to the asymmetric construction of C-O bonds at fully substituted carbon centers in the synthesis of chiral 2,2-disubstituted benzomorpholines.
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Affiliation(s)
- Cheng-Che Tsai
- Department of Chemistry, University of California, Berkeley Berkeley, CA 94720 (USA)
| | - Christopher Sandford
- Department of Chemistry, University of Utah 315 South 1400 East, Salt Lake City, UT 84112 (USA)
| | - Tao Wu
- Department of Chemistry, University of California, Berkeley Berkeley, CA 94720 (USA)
| | - Buyun Chen
- Department of Chemistry, University of California, Berkeley Berkeley, CA 94720 (USA)
| | - Matthew S. Sigman
- Department of Chemistry, University of Utah 315 South 1400 East, Salt Lake City, UT 84112 (USA)
| | - F. Dean Toste
- Department of Chemistry, University of California, Berkeley Berkeley, CA 94720 (USA)
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424
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Zhang XL, Zhang L, Chen JH, Li CY, Sun WM. On the Interaction between Superatom Al 12Be and DNA Nucleobases/Base Pairs: Bonding Nature and Potential Applications in O 2 Activation and CO Oxidation. ACS OMEGA 2020; 5:15325-15334. [PMID: 32637806 PMCID: PMC7331033 DOI: 10.1021/acsomega.0c01375] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 06/02/2020] [Indexed: 06/11/2023]
Abstract
The interaction between quasi-chalcogen superatom Al12Be and DNA nucleobases/base pairs has been explored by searching for the most stable Al12Be-X (X = DNA bases and base pairs) complexes. Our results reveal that Al12Be prefers to combine with guanine by two Al-O and Al-N bonds rather than the other DNA bases, no matter in free state or base pair. The formed Al-N and Al-O bonds between Al12Be and DNA bases proved to be strong polar covalent bonds by the Wiberg bond index, nature bond orbitals, atoms in molecules theory, localized molecular orbitals, and electron localization functions analyses. More importantly, it is found that the formed global minimum of Al12Be-G has the ability to activate an oxygen molecule into a peroxide dianion 1O2 2-, which can further catalyze the CO oxidation via the Eley-Rideal mechanism with a small energy barrier of 7.78 kcal/mol. We hope that this study could not only provide an in-depth understanding on the intermolecular interaction between metallic superatoms and DNA at the molecular level but also attract more interest in designing and synthesizing superatom-based heterogeneous catalysts with DNA/nucleobases as basic building blocks.
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Affiliation(s)
- Xiao-Ling Zhang
- Fujian
Key Laboratory of Drug Target Discovery and Structural and Functional
Research, The School of Pharmacy, Fujian Medical University, Fuzhou 350108, People’s Republic of China
| | - Li Zhang
- Fujian
Key Laboratory of Drug Target Discovery and Structural and Functional
Research, The School of Pharmacy, Fujian Medical University, Fuzhou 350108, People’s Republic of China
| | - Jing-Hua Chen
- Fujian
Key Laboratory of Drug Target Discovery and Structural and Functional
Research, The School of Pharmacy, Fujian Medical University, Fuzhou 350108, People’s Republic of China
| | - Chun-Yan Li
- The
School of Pharmacy, Fujian Medical University, Fuzhou 350108, People’s Republic of China
| | - Wei-Ming Sun
- Fujian
Key Laboratory of Drug Target Discovery and Structural and Functional
Research, The School of Pharmacy, Fujian Medical University, Fuzhou 350108, People’s Republic of China
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425
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Tsai C, Sandford C, Wu T, Chen B, Sigman MS, Toste FD. Enantioselective Intramolecular Allylic Substitution via Synergistic Palladium/Chiral Phosphoric Acid Catalysis: Insight into Stereoinduction through Statistical Modeling. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202006237] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Cheng‐Che Tsai
- Department of Chemistry University of California, Berkeley Berkeley CA 94720 USA
- Present address: Department of Chemistry Tunghai University Taichung City 40704 Taiwan
| | - Christopher Sandford
- Department of Chemistry University of Utah 315 South 1400 East Salt Lake City UT 84112 USA
| | - Tao Wu
- Department of Chemistry University of California, Berkeley Berkeley CA 94720 USA
| | - Buyun Chen
- Department of Chemistry University of California, Berkeley Berkeley CA 94720 USA
| | - Matthew S. Sigman
- Department of Chemistry University of Utah 315 South 1400 East Salt Lake City UT 84112 USA
| | - F. Dean Toste
- Department of Chemistry University of California, Berkeley Berkeley CA 94720 USA
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426
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Feng A, Yang Y, Liu Y, Geng C, Zhu R, Zhang D. Mechanism and Origins of Enantio- and Regioselectivities in Catalytic Asymmetric Minisci-Type Addition to Heteroarenes. J Org Chem 2020; 85:7207-7217. [PMID: 32420740 DOI: 10.1021/acs.joc.0c00597] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
This work presents a density functional theory (DFT) study on the mechanism and origins of enantio- and regioselectivities in dual photoredox/chiral Brønsted acid-catalyzed asymmetric Minisci-type addition of carbon-centered radicals to N-heteroarenes [Science, 2018, 360, 419-422]. The previously proposed mechanism has been partially revised. First, photoexcited *[IrIII] is reductively quenched by TRIP anion rather than the experimentally proposed neutral radical generated from the chiral Brønsted acid cycle. Second, final product formation involves a hydrogen-atom transfer (HAT) from a neutral radical intermediate to the TRIP radical, instead of single-electron transfer (SET) to *[IrIII]. The TRIP catalyst has been shown to play a triple role by reductively quenching *[IrIII] with its anion form, activating the substrate, and inducing asymmetry. The calculated results rationalize the experimentally observed enantio- and regioselectivities and reveal that the enantioselectivity of the reaction originates from the hydrogen-bond interaction between TRIP and the N-H group of the carbon-centered radical, and the regioselectivity arises from the electron-withdrawing inductive effect from the protonated N-atom and the intramolecular hydrogen-bond interaction between the acetylamino group and the protonated pyridine ring. We also provide explanations for the experimentally observed a dramatic decrease in enantioselectivity when changing substrate or radical precursor and rationalize the solvent-controlled switch of regioselectivity.
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Affiliation(s)
- Aili Feng
- Institute of Theoretical Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. China
| | - Yiying Yang
- Institute of Theoretical Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. China
| | - Yanhong Liu
- Institute of Theoretical Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. China
| | - Cuihuan Geng
- Institute of Theoretical Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. China.,Department of Chemical and Environmental Engineering, Anyang Institute of Technology, Anyang 455000, P. R. China
| | - Rongxiu Zhu
- Institute of Theoretical Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. China
| | - Dongju Zhang
- Institute of Theoretical Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. China
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427
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Su S, Fang H. Theoretical investigation on the ESIPT mechanism and fluorescent sensing mechanism of 2-(2'-hydroxyphenyl) thiazole-4-carboxaldeyde in methanol. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 233:118214. [PMID: 32151989 DOI: 10.1016/j.saa.2020.118214] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 02/26/2020] [Accepted: 03/01/2020] [Indexed: 06/10/2023]
Abstract
2-(2'-Hydroxyphenyl) thiazole-4-carboxaldeyde (aldehyde 1) and hemiacetal 2 were selected to study the mechanism of excited-state intramolecular proton transfer and the detecting of Al3+ ion in methanol by using density functional theory (DFT) and time-dependent density functional theory (TDDFT) methods. Our theoretical results are in good agreement with the experimental values. The intramolecular H-bond is enhanced in the first excited-state based on the analyses of structural parameters, frontier molecular orbitals and electronic spectra. The stronger intramolecular H-bond is more favorable for ESIPT process. In order to further demonstrate the proton transfer process, we constructed the potential energy curves of probe 1 and 2 in both ground- and excited-states, and concluded that proton transfer processes in probe 1 and 2 are apt to happen in the S1 state. In addition, the Mayer bond order, energy gap and absorption and fluorescence spectra were applied to interpret the process of detection of Al3+ ion.
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Affiliation(s)
- Shenyang Su
- Department of Chemistry and Material Science, College of Science, Nanjing Forestry University, Nanjing 210037, People's Republic of China
| | - Hua Fang
- Department of Chemistry and Material Science, College of Science, Nanjing Forestry University, Nanjing 210037, People's Republic of China.
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428
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Hao H, Schafer LL. Metal–Ligand Cooperativity in Titanium-Catalyzed Anti-Markovnikov Hydroamination. ACS Catal 2020. [DOI: 10.1021/acscatal.0c00491] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Han Hao
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada V6T1Z1
| | - Laurel L. Schafer
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada V6T1Z1
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429
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Su S, Fang H. Modulating ESIPT behavior and fluorescent sensing mechanism of 2-(2′-hydroxyphenol)thiazole-4-carbonxaldeyde derivatives: A theoretical study. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137342] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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430
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Qian JJ, Chen GH, Xiao ST, Li HB, Ouyang YG, Wang Q. Switching Xe/Kr adsorption selectivity in modified SBMOF-1: a theoretical study. RSC Adv 2020; 10:17195-17204. [PMID: 35521447 PMCID: PMC9053438 DOI: 10.1039/d0ra02212h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 04/23/2020] [Indexed: 12/31/2022] Open
Abstract
The separation of Xe/Kr mixtures in used nuclear fuel (UNF) has attracted lots of attention, but no report on the adsorption and separation of Kr from mixed Kr/Xe at room temperature can be found. From grand canonical Monte Carlo (GCMC) simulation, it is found that by replacing the metal center Ca of SBMOF-1 with Mg, due to the appropriate pore size, the adsorption selectivity (S Kr/Xe) was extremely high (250 000) and the adsorption capacity for Kr on Mg-SBMOF-1 modified with -NH2 was increased by 300% to 1.020 from 0.248 mmol g-1. Based on the calculations of density functional theory (DFT), we found that the stronger electron-donating ability of a functional group will increase the polarizability of the ligand, and thus increase the adsorption capacity to Kr. In addition, the analysis of electronic structures with independent gradient model (IGM) and energy decomposition analysis (EDA) indicates that van der Waals forces will be responsible for the interaction of Mg-SBMOF-1 and Kr gas. Among them, the interaction of Mg-SBMOF-1 and Kr gas is mainly an induction force, while that of modifications with -CH3 and -NH2 is mainly a dispersion force. The present theoretical study represents the first report of the separation of Kr from Xe with MOF adsorption at room temperature. We hope this work may promote the experimental synthesis of Mg-SBMOF-1 for efficient separation of Kr and Xe.
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Affiliation(s)
- Jiao-Jiao Qian
- Department of Chemistry, Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University Guangdong 515063 China
| | - Guang-Hui Chen
- Department of Chemistry, Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University Guangdong 515063 China
| | - Song-Tao Xiao
- Institute of Radiochemistry, China Institute of Atomic Energy (CIAE) Beijing 102413 People's Republic of China
| | - Hui-Bo Li
- Institute of Radiochemistry, China Institute of Atomic Energy (CIAE) Beijing 102413 People's Republic of China
| | - Ying-Gen Ouyang
- Institute of Radiochemistry, China Institute of Atomic Energy (CIAE) Beijing 102413 People's Republic of China
| | - Qiang Wang
- Department of Applied Chemistry, College of Science, Nanjing Tech University Nanjing 211816 People's Republic of China
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431
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Anconi CPA. Relative Position and Relative Rotation in Supramolecular Systems through the Analysis of the Principal Axes of Inertia: Ferrocene/Cucurbit[7]uril and Ferrocenyl Azide/β-Cyclodextrin Case Studies. ACS OMEGA 2020; 5:5013-5025. [PMID: 32201787 PMCID: PMC7081398 DOI: 10.1021/acsomega.9b03914] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 02/25/2020] [Indexed: 06/10/2023]
Abstract
Parameters comprising the relative position and relative rotation of molecules can be evaluated when the principal axes of inertia of the entities in a supramolecular association are employed as reference. Such information applies to the characterization and identification of experimental and theoretical nonbonded systems. The parameters are relevant to geometric comparison (for theory and experiment) and, for instance, to monitoring structures by theoretical simulations. This work introduces a software developed to obtain such parameters through the discussion of some intriguing host-guest systems, the ferrocene/cucurbit[7]uril and ferrocenyl azide/β-cyclodextrin. The ideas within this contribution naturally apply to the study of other nonbonded associations beyond host-guest chemistry. A modified version of the software discussed herein serves to obtain user-defined spatial arrangements for two nonbonded entities. Therefore, with a given geometry, for instance, from X-ray data, the parameters can be derived, and with the parameters, from a theoretical perspective, a spatial arrangement can be obtained.
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432
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Shi S, Li J, Sun F, Chen Y, Pang C, Geng Y, Qi J, Guo S, Wang X, Zhang H, Zhan Y, An H. Molecular Mechanisms and Structural Basis of Retigabine Analogues in Regulating KCNQ2 Channel. J Membr Biol 2020; 253:167-181. [DOI: 10.1007/s00232-020-00113-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Accepted: 03/05/2020] [Indexed: 12/22/2022]
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433
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Investigation of the hydrogen, halogen and pnicogen dimers by means of molecular face calculated by ab initio method. Theor Chem Acc 2020. [DOI: 10.1007/s00214-020-2568-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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434
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Toward an Understanding of the Formation and Desolvation of Methanol Solvate, and Structure of Methanolysis Product: A Case Study of Nicosulfuron. CRYSTALS 2020. [DOI: 10.3390/cryst10030157] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Nicosulfuron (NS) is a widely used sulfonylurea herbicide because of its high selectivity, broad spectrum of herbicide activity, and excellent performance. In this work, nicosulfuron methanol solvate (NS-MeOH) and [[3-[(Dimethylamino)carbonyl]-2-pyridinyl]sulfonyl]carbamic acid methyl ester (PCM) as a product of methanolysis of NS were obtained. Both of their structures were determined by a single crystal X-ray diffraction. A broad range of analytical techniques was applied to characterize the NS-MeOH, such as Powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and hot stage microscopy (HSM). Combined with the analysis of the Independent gradient model (IGM), Atom-in-molecules (AIM), and Hirshfeld surface (HS), direct insights into the role of solvent played in the formation of NS-MeOH and the mechanism of solid-to-solid phase transformation of NS-MeOH could be obtained. In addition, the aqueous solubility of NS was improved through the formation of NS-MeOH. A systematic investigation of herbicidal activity of NS and PCM was carried out. It was found that NS and NS-MeOH had similar herbicidal activities at the experimental concentrations while PCM exhibited significantly lower activity. It was suggested that methanolysis of the sulfonylurea bridge in the NS molecule exerted a great influence on the herbicidal activity.
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435
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Afonin AV, Vashchenko AV. Quantitative decomposition of resonance-assisted hydrogen bond energy in β-diketones into resonance and hydrogen bonding (π- and σ-) components using molecular tailoring and function-based approaches. J Comput Chem 2020; 41:1285-1298. [PMID: 32061114 DOI: 10.1002/jcc.26175] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 02/03/2020] [Indexed: 01/07/2023]
Abstract
Using the molecular tailoring and function-based approaches allows one to divide the energy of the O─H⋯O═C resonance-assisted hydrogen bond in a series of the β-diketones into resonance and hydrogen bonding components. The magnitude of the resonance component is assessed as about 6 kcal mol-1 . This value increases by ca. 1 kcal mol-1 on going from the weak to strong resonance-assisted hydrogen bonding. The magnitude of the hydrogen bonding component varies in the wide range from 2 to 20 kcal mol-1 depending on the structure of the β-diketone in question.
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Affiliation(s)
- Andrei V Afonin
- Institute of Chemistry, Siberian Division of Russian Academy of Sciences, Irkutsk, Russia
| | - Alexander V Vashchenko
- Institute of Chemistry, Siberian Division of Russian Academy of Sciences, Irkutsk, Russia
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436
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Yang Q, Yang H, Ding X, Xue W, Sun S. The effect of adsorption and grafting on the acidity of [(HSO 3)C3C1im] +[Cl] - on the surface of (SiO 2) 4O 2H 4 clusters. J Mol Graph Model 2020; 96:107528. [PMID: 31918320 DOI: 10.1016/j.jmgm.2019.107528] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 12/05/2019] [Accepted: 12/28/2019] [Indexed: 11/16/2022]
Abstract
Both adsorption and graft of active components on the surface of the silica are paramount methods for preparing heterogeneous catalysts. In this paper, the acidity of [(HSO3)C3C1im]+[Cl]- adsorbed and grafted on the surface of silica clusters was calculated at the level of B3LYP-d3/6-311++g(d, p). The results showed that both methods can enhance the acidity of the ionic liquids (ILs). The hydroxyl group on the carrier surface can increase the acidity, and moreover the acidity increases with the number of hydroxyl group. Besides, geometric parameters, ESP, topology and NBO analysis proved that the ILs acidity on the hydroxyl-free surface was mainly influenced by the interaction between -SO3 group and cluster surface. And yet the ILs acidity on the hydroxylated surface changes followed with the moderate strength hydrogen bond between the ILs and cluster surface.
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Affiliation(s)
- Qiusheng Yang
- School of Chemical Engineering, Hebei University of Technology, Tianjin, 300130, PR China; Tianjin Key Laboratory of Chemical Process Safety, Hebei University of Technology, Tianjin, 300130, PR China.
| | - Hansen Yang
- School of Chemical Engineering, Hebei University of Technology, Tianjin, 300130, PR China
| | - Xiaoshu Ding
- School of Chemical Engineering, Hebei University of Technology, Tianjin, 300130, PR China
| | - Wei Xue
- School of Chemical Engineering, Hebei University of Technology, Tianjin, 300130, PR China; Hebei Province Technology Institute of Green Chemical Industry, Hebei University of Technology, Tianjin, 300130, PR China
| | - Shujuan Sun
- School of Chemical Engineering, Hebei University of Technology, Tianjin, 300130, PR China.
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437
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Basak T, Das D, Ray PP, Banerjee S, Chattopadhyay S. Synthesis, characterization, self-assembly and non-ohmic Schottky barrier diode behaviors of two iron(iii) based semiconductors with theoretical insight. CrystEngComm 2020. [DOI: 10.1039/d0ce00223b] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Schottky barrier diodes have been fabricated using two iron(iii) Schiff base complexes. The total and partial DOS values have been calculated using DFT to calculate the band gaps in these complexes.
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Affiliation(s)
- Tanmoy Basak
- Department of Chemistry
- Inorganic Section
- Jadavpur University
- Kolkata-700032
- India
| | - Dhananjoy Das
- Department of Physics
- Jadavpur University
- Kolkata-700032
- India
| | | | - Snehasis Banerjee
- Govt. College of Engineering and Leather Technology
- Kolkata 700106
- India
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438
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Sanchora P, Pandey DK, Kagdada HL, Materny A, Singh DK. Impact of alkyl chain length and water on the structure and properties of 1-alkyl-3-methylimidazolium chloride ionic liquids. Phys Chem Chem Phys 2020; 22:17687-17704. [DOI: 10.1039/d0cp01686a] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Conformational isomerism in Cnmim Cl (n = 2, 4, 6, 8, and 10) is identified by marker IR bands for the first time.
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Affiliation(s)
- Paridhi Sanchora
- Department of Physics
- Institute of Infrastructure Technology Research and Management
- Ahmedabad
- India
| | - Deepak K. Pandey
- Department of Physics
- Institute of Infrastructure Technology Research and Management
- Ahmedabad
- India
| | - Hardik L. Kagdada
- Department of Physics
- Institute of Infrastructure Technology Research and Management
- Ahmedabad
- India
| | - Arnulf Materny
- Department of Physics and Earth Sciences
- Jacobs University Bremen
- Bremen
- Germany
| | - Dheeraj K. Singh
- Department of Physics
- Institute of Infrastructure Technology Research and Management
- Ahmedabad
- India
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439
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Yang J, Wang N, Tian B, Ji X, Hou B, Wang T, Huang X, Su J, Yang Z, Hao H. Multicomponent supramolecular assembly of p-hydroxybenzoic acid and malonic acid: a deep insight into the formation of selective cocrystals. CrystEngComm 2020. [DOI: 10.1039/d0ce00833h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Insight into the selective cocrystallization between HBA isomers and MA.
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Affiliation(s)
- Jinyue Yang
- National Engineering Research Center of Industrial Crystallization Technology
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Na Wang
- National Engineering Research Center of Industrial Crystallization Technology
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Beiqian Tian
- National Engineering Research Center of Industrial Crystallization Technology
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Xiongtao Ji
- National Engineering Research Center of Industrial Crystallization Technology
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Baohong Hou
- National Engineering Research Center of Industrial Crystallization Technology
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Ting Wang
- National Engineering Research Center of Industrial Crystallization Technology
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Xin Huang
- National Engineering Research Center of Industrial Crystallization Technology
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Junquan Su
- Shenzhen China Resources Gosun Pharmaceuticals Co., Ltd
- China
| | - Zhanao Yang
- Shenzhen China Resources Gosun Pharmaceuticals Co., Ltd
- China
| | - Hongxun Hao
- National Engineering Research Center of Industrial Crystallization Technology
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- China
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440
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Hosseini ST, Raissi H, Pakdel M. High-performance carbon dioxide capture and storage by multi-functional sphingosine kinase inhibitors through a CO2-philic membrane. NEW J CHEM 2020. [DOI: 10.1039/d0nj01231a] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Carbon dioxide (CO2) capture using environmentally friendly sphingosine-based materials was theoretically studied.
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Affiliation(s)
| | - Heidar Raissi
- Department of Chemistry
- Faculty of Science
- University of Birjand
- Birjand
- Iran
| | - Majid Pakdel
- Department of Chemistry
- Faculty of Science
- University of Birjand
- Birjand
- Iran
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