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Murakami T, Takahashi S, Kikuma Y, Takayanagi T. Theoretical Study of the Thermal Rate Coefficients of the H 3+ + C 2H 4 Reaction: Dynamics Study on a Full-Dimensional Potential Energy Surface. Molecules 2024; 29:2789. [PMID: 38930853 PMCID: PMC11206701 DOI: 10.3390/molecules29122789] [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: 04/27/2024] [Revised: 06/08/2024] [Accepted: 06/09/2024] [Indexed: 06/28/2024] Open
Abstract
Ion-molecular reactions play a significant role in molecular evolution within the interstellar medium. In this study, the entrance channel reaction, H3+ + C2H4 → H2 + C2H5+, was investigated using classical molecular dynamic (classical MD) and ring polymer molecular dynamic (RPMD) simulation techniques. We developed an analytical potential energy surface function with a permutationally invariant polynomial basis, specifically employing the monomial symmetrized approach. Our dynamic simulations reproduced the rate coefficient of 300 K for H3+ + C2H4 → H2 + C2H5+, aligning reasonably well with the values in the kinetic database commonly utilized in astrochemistry. The thermal rate coefficients obtained using both the classical MD and RPMD techniques exhibited an increase from 100 K to 300 K as the temperature rose. Additionally, we analyzed the excess energy distribution of the C2H5+ fragment with respect to temperature to investigate the indirect reaction pathway of C2H5+ → H2 + C2H3+. This result suggests that the indirect reaction pathway of C2H5+ → H2 + C2H3+ holds minor significance, although the distribution highly depends on the collisional temperature.
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Affiliation(s)
- Tatsuhiro Murakami
- Department of Chemistry, Saitama University, Shimo-Okubo 255, Sakura-ku, Saitama City 338-8570, Japan; (S.T.); (Y.K.)
- Department of Materials & Life Sciences, Faculty of Science & Technology, Sophia University, 7-1 Kioicho, Chiyoda-ku, Tokyo 102-8554, Japan
| | - Soma Takahashi
- Department of Chemistry, Saitama University, Shimo-Okubo 255, Sakura-ku, Saitama City 338-8570, Japan; (S.T.); (Y.K.)
| | - Yuya Kikuma
- Department of Chemistry, Saitama University, Shimo-Okubo 255, Sakura-ku, Saitama City 338-8570, Japan; (S.T.); (Y.K.)
| | - Toshiyuki Takayanagi
- Department of Chemistry, Saitama University, Shimo-Okubo 255, Sakura-ku, Saitama City 338-8570, Japan; (S.T.); (Y.K.)
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2
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Reimann M, Kirsch C, Sebastiani D, Kaupp M. Rydberg electron stabilizes the charge localized state of the diamine cation. Nat Commun 2024; 15:293. [PMID: 38177143 PMCID: PMC10767003 DOI: 10.1038/s41467-023-44526-y] [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: 05/04/2023] [Accepted: 12/18/2023] [Indexed: 01/06/2024] Open
Abstract
A previous controversial discussion regarding the interpretation of Rydberg spectra of gaseous dimethylpiperazine (DMP) as showing the co-existence of a localized and delocalized mixed-valent DMP+ radical cation is revisited. Here we show by high-level quantum-chemical calculations that an apparent barrier separating localized and delocalized DMP+ minima in previous multi-reference configuration-interaction (MRCI) calculations and in some other previous computations were due to unphysical curve crossings of the reference wave functions. These discontinuities on the surface are removed in state-averaged MRCI calculations and with some other, orthogonal high-level approaches, which do not provide a barrier and thus no localized minimum. We then proceed to show that in the actually observed Rydberg state of neutral DMP the 3s-type Rydberg electron binds more strongly to a localized positive charge distribution, generating a localized DMP* Rydberg-state minimum, which is absent for the DMP+ cation. This work presents a case where interactions of a Rydberg electron with the underlying cationic core alter molecular structure in a fundamental way.
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Affiliation(s)
- Marc Reimann
- Theoretische Chemie/Quantenchemie, Institut für Chemie, Sekr. C7, Technische Universität Berlin, 10623, Berlin, Germany
| | - Christoph Kirsch
- Institut für Chemie, Martin-Luther-University Halle-Wittenberg, 06120, Halle (Saale), Germany
| | - Daniel Sebastiani
- Institut für Chemie, Martin-Luther-University Halle-Wittenberg, 06120, Halle (Saale), Germany
| | - Martin Kaupp
- Theoretische Chemie/Quantenchemie, Institut für Chemie, Sekr. C7, Technische Universität Berlin, 10623, Berlin, Germany.
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3
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Boebinger MG, Brea C, Ding LP, Misra S, Olunloyo O, Yu Y, Xiao K, Lupini AR, Ding F, Hu G, Ganesh P, Jesse S, Unocic RR. The Atomic Drill Bit: Precision Controlled Atomic Fabrication of 2D Materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2210116. [PMID: 36635517 DOI: 10.1002/adma.202210116] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 01/02/2023] [Indexed: 06/17/2023]
Abstract
The ability to deterministically fabricate nanoscale architectures with atomic precision is the central goal of nanotechnology, whereby highly localized changes in the atomic structure can be exploited to control device properties at their fundamental physical limit. Here, an automated, feedback-controlled atomic fabrication method is reported and the formation of 1D-2D heterostructures in MoS2 is demonstrated through selective transformations along specific crystallographic orientations. The atomic-scale probe of an aberration-corrected scanning transmission electron microscope (STEM) is used, and the shape and symmetry of the scan pathway relative to the sample orientation are controlled. The focused and shaped electron beam is used to reliably create Mo6 S6 nanowire (MoS-NW) terminated metallic-semiconductor 1D-2D edge structures within a pristine MoS2 monolayer with atomic precision. From these results, it is found that a triangular beam path aligned along the zig-zag sulfur terminated (ZZS) direction forms stable MoS-NW edge structures with the highest degree of fidelity without resulting in disordering of the surrounding MoS2 monolayer. Density functional theory (DFT) calculations and ab initio molecular dynamic simulations (AIMD) are used to calculate the energetic barriers for the most stable atomic edge structures and atomic transformation pathways. These discoveries provide an automated method to improve understanding of atomic-scale transformations while opening a pathway toward more precise atomic-scale engineering of materials.
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Affiliation(s)
- Matthew G Boebinger
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, TN, 37830, USA
| | - Courtney Brea
- Department of Chemistry and Biochemistry, Queens College, City University of New York, 65-30 Kissena Blvd, Flushing, NY, 11367, USA
| | - Li-Ping Ding
- Department of Physics, Shaanxi University of Science and Technology, Xi'an Weiyang University Park, Xi'an, Shaanxi Province, China
| | - Sudhajit Misra
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, TN, 37830, USA
| | - Olugbenga Olunloyo
- Department of Physics and Astronomy, University of Tennessee, 1408 Circle Dr, Knoxville, TN, 37996, USA
| | - Yiling Yu
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, TN, 37830, USA
- School of Physics and Technology, Wuhan University, Wuchang District, Wuhan, Hubei, 430072, China
| | - Kai Xiao
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, TN, 37830, USA
| | - Andrew R Lupini
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, TN, 37830, USA
| | - Feng Ding
- Centre for Multidimensional Carbon Materials, Institute for Basic Science, 50 UNIST-gil, Ulsan, 44919, South Korea
- School of Materials Science and Engineering, Ulsan Institute of Science and Technology, 50 UNIST-gil, Ulsan, 44919, South Korea
| | - Guoxiang Hu
- Department of Chemistry and Biochemistry, Queens College, City University of New York, 65-30 Kissena Blvd, Flushing, NY, 11367, USA
| | - Panchapakesan Ganesh
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, TN, 37830, USA
| | - Stephen Jesse
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, TN, 37830, USA
| | - Raymond R Unocic
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, TN, 37830, USA
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Yin S, Shen Q, Liu YD, Zhong R. Comparison of nitrate formation mechanisms from free amino acids and amines during ozonation: a computational study. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2023; 25:680-693. [PMID: 36809457 DOI: 10.1039/d2em00501h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Nitrate as a potential surrogate parameter for abatement of micropollutants, oxidant exposure, and characterizing oxidant-reactive DON during ozonation has attracted extensive attention, however, understanding of its formation mechanisms is still limited. In this study, nitrate formation mechanisms from amino acids (AAs) and amines during ozonation were investigated by the DFT method. The results indicate that N-ozonation initially occurs to produce competitive nitroso- and N,N-dihydroxy intermediates, and the former is preferred for both AAs and primary amines. Then, oxime and nitroalkane are generated during further ozonation, which are the important last intermediate products for nitrate formation from the respective AAs and amines. Moreover, the ozonation of the above important intermediates is the nitrate yield-controlling step, where the relatively higher reactivity of the CN moiety in the oxime compared to the general Cα atom in the nitroalkane explains why the nitrate yields of most AAs are higher than those from general amines, and it is the larger number of released Cα- anions, which are the real reaction sites attacked by ozone, that leads to the higher nitrate yield for nitroalkane with an electron-withdrawing group bound to the Cα atom. The good relationship between nitrate yields and activation free energies of the rate-limiting step (ΔG≠rls) and nitrate yield-controlling step (ΔG≠nycs) for the respective AAs and amines verifies the reliability of the proposed mechanisms. Additionally, the bond dissociation energy of Cα-H in the nitroalkanes formed from amines was found to be a good parameter to evaluate the reactivity of the amines. The findings here are helpful for further understanding nitrate formation mechanisms and predicting nitrate precursors during ozonation.
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Affiliation(s)
- Shuning Yin
- Beijing Key Laboratory of Environmental and Viral Oncology, College of Life Science & Bioengineering, Beijing University of Technology, Beijing 100124, China.
| | - Qunfang Shen
- Beijing Key Laboratory of Environmental and Viral Oncology, College of Life Science & Bioengineering, Beijing University of Technology, Beijing 100124, China.
| | - Yong Dong Liu
- Beijing Key Laboratory of Environmental and Viral Oncology, College of Life Science & Bioengineering, Beijing University of Technology, Beijing 100124, China.
| | - Rugang Zhong
- Beijing Key Laboratory of Environmental and Viral Oncology, College of Life Science & Bioengineering, Beijing University of Technology, Beijing 100124, China.
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Zhao H, Wang S, Zhang Y, Lu C, Tang Y. Degradation of mevinphos and monocrotophos by OH radicals in the environment: A computational investigation on mechanism, kinetic, and ecotoxicity. JOURNAL OF HAZARDOUS MATERIALS 2023; 445:130478. [PMID: 36493641 DOI: 10.1016/j.jhazmat.2022.130478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 10/30/2022] [Accepted: 11/23/2022] [Indexed: 06/17/2023]
Abstract
Known organophosphorus pesticides are used widely in agriculture to improve the production of crops. Based on the literature, the degradation of some organophosphorus pesticides was studied theoretically. However, the mechanisms and variation of toxicity during the degradation of mevinphos and monocrotophos are still unclear in the environment, especially in wastewater. In this study, the reaction mechanisms for the degradation of the two representative organophosphorus pesticides (i.e., mevinphos and monocrotophos) in presence of OH radicals in the atmosphere and water are proposed using quantum chemical methods wB97-XD/6-311 + +G(3df,2pd)//wB97-XD/6-311 + +G(d,p). Result shows that the dominant channel is OH-addition to the C atom in CC bond with energy barriers being 15.6 and 14.7 kJ/mol, in the atmosphere and water, respectively, for mevinphos. As for monocrotophos, H-abstraction from NH group via barriers of 8.2 and 10.6 kJ/mol is more feasible in both the atmosphere and water. Moreover, the subsequent reactions of the major products in the atmosphere with NO and O2 were also studied to evaluate the atmospheric chemistry of mevinphos and monocrotophos. Kinetically, the total rate constant is 2.68 × 10-9 and 3.86 × 10-8 cm3 molecule-1·s-1 for mevinphos and monocrotophos in the atmosphere and 4.91 × 1010 and 7.77 × 1011 M-1 s-1 in the water at 298 K, thus the lifetime is estimated to be 36.46-364.60 s (2.53-25.31 s) in the atmosphere, and 1.41 × 10-2 - 1.41 × 10-1 s (8.92 ×10-4 - 8.92 ×10-3 s) in the advanced oxidation processes (AOPs) system. Furthermore, ecotoxic predictions for rats and three aqueous organisms imply their toxicity are reduced during degradation by using ECOSAR and T.E.S.T program based quantitative structure and activity relationship (QSAR) method.
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Affiliation(s)
- Hui Zhao
- School of Environmental and municipal engineering, Qingdao University of Technology, Fushun Road 11, Qingdao, Shandong 266033, PR China
| | - Shuangjun Wang
- School of Environmental and municipal engineering, Qingdao University of Technology, Fushun Road 11, Qingdao, Shandong 266033, PR China
| | - Yunju Zhang
- College of Chemistry and Chemical Engineering, Mianyang Normal University, Mianyang 621000, PR China
| | - Chenggang Lu
- School of Environmental and municipal engineering, Qingdao University of Technology, Fushun Road 11, Qingdao, Shandong 266033, PR China
| | - Yizhen Tang
- School of Environmental and municipal engineering, Qingdao University of Technology, Fushun Road 11, Qingdao, Shandong 266033, PR China.
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Zhao D, Liu X, Zhao B, Xue J, Yan Z, Hong Z, Zhai G, Peng M, Zhang W, Hu L, Mao L. Preparation of a novel iron oxychloride (FeOCl) auxiliary electrode in promoting electrokinetic remediation of Cr(VI) contaminated soil: An experimental and DFT calculation analysis. JOURNAL OF HAZARDOUS MATERIALS 2023; 443:130152. [PMID: 36244104 DOI: 10.1016/j.jhazmat.2022.130152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 09/18/2022] [Accepted: 10/06/2022] [Indexed: 06/16/2023]
Abstract
The utilization of auxiliary electrode can improve substantially the electrokinetic remediation efficiency of heavy metal contaminated soil. The increase in the auxiliary electrode performance is the key to further promote the electrokinetic remediation efficiency. In this study, two kinds of auxiliary electrodes, pure FeOCl and doped FeOCl with W and S, were prepared and used in the electrokinetic remediation of Cr(VI) contaminated soil. The system equipped with the auxiliary electrode doped FeOCl brought more stable system current (202 mA) and more uniform electric field than blank group (130 mA). The reduction rate of Cr(VI) was increased by 50% due to the presence of Fe2+ and S2-. The accelerating migration of ions by auxiliary electrode was responsible for the improvement in electrokinetic remediation efficiency. Density functional theory (DFT) calculation showed that Cl vacancy formation energies of pure FeOCl, S-doped FeOCl (S/FeOCl) and W-doped FeOCl (W/FeOCl) were 1.29, 1.15 and 1.49 eV respectively, and the ion diffusion barriers were 0.093, 0.099 and 0.148 eV respectively. Calculation results indicated that the doping of S was conducive to the diffusion of Cl ions, and the bonding of W-Cl was stronger than Fe-Cl. The charging and discharging process of auxiliary electrode became easier due to the formation of lower vacancy in S-doped FeOCl, which could bring a higher current for the electrokinetic remediation system. The electrochemical performance of FeOCl doped with W and S was improved obviously. This study provided a further explanation for the positive role of auxiliary electrode in electrokinetic remediation system.
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Affiliation(s)
- Dingsheng Zhao
- School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China
| | - Xiao Liu
- School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China
| | - Bincheng Zhao
- School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China
| | - Jinhui Xue
- School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China
| | - Zhuang Yan
- School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China
| | - Ziwen Hong
- School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China
| | - Guangqun Zhai
- School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China
| | - Mingguo Peng
- School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China
| | - Wenyi Zhang
- School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China
| | - Linchao Hu
- School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China
| | - Linqiang Mao
- School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China.
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7
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Bresnahan CG, McAlexander HR, Woodley CM, Shukla MK. Density functional theory explorations of parathion and paraoxon hydrolysis as a function of the underlying alkaline environment. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2022; 24:2249-2262. [PMID: 36129094 DOI: 10.1039/d2em00296e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Parathion, a once commonly used pesticide known for its potential toxicity, can follow several degradation mechanisms in the environment. Given the species stability and persistence, parathion can be washed into waterways from rain, and therefore an atomistic perspective of the hydrolysis of parathion, and its byproduct paraoxon, is required in order to understand its fate in the environment. Experimental studies have determined that pH plays an important role in the calculated hydrolysis rate constants of parathion degradation. In this work, the degradation of parathion into either paraoxon or 4-nitrophenol, and the degradation of paraoxon to 4-nitrophenol are explored through density functional theory using the M06-2X functional. How the level of basicity affects the reaction mechanism is explored through two different hydroxide/water environments. Our calculations support the anticipated mechanisms determined by previous experimental work that the formation of 4-nitrophenol is the predominant pathway in hydrolysis of parathion.
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Affiliation(s)
- Caitlin G Bresnahan
- Oak Ridge Institute for Science and Education, Oak Ridge, Tennessee, USA
- US Army Corps of Engineers, Engineer Research and Development Center, Environmental Laboratory, Vicksburg 39180, Mississippi, USA.
| | - Harley R McAlexander
- US Army Corps of Engineers, Engineer Research and Development Center, Environmental Laboratory, Vicksburg 39180, Mississippi, USA.
| | - Christa M Woodley
- US Army Corps of Engineers, Engineer Research and Development Center, Environmental Laboratory, Vicksburg 39180, Mississippi, USA.
| | - Manoj K Shukla
- US Army Corps of Engineers, Engineer Research and Development Center, Environmental Laboratory, Vicksburg 39180, Mississippi, USA.
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8
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Wang Y, Zeng X, Shu S. Theoretical study on the degradation mechanism of propranolol in aqueous solution initiated by hydroxyl and sulfate radicals. COMPUT THEOR CHEM 2022. [DOI: 10.1016/j.comptc.2022.113924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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9
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Liu W, Li Y, Wang Y, Zhao Y, Xu Y, Liu X. DFT insights into the degradation mechanism of carbendazim by hydroxyl radicals in aqueous solution. JOURNAL OF HAZARDOUS MATERIALS 2022; 431:128577. [PMID: 35248962 DOI: 10.1016/j.jhazmat.2022.128577] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 02/08/2022] [Accepted: 02/23/2022] [Indexed: 06/14/2023]
Abstract
Advanced oxidation of carbendazim by OH radicals is a central step in its wastewater remediation. However, the understanding of the degradation mechanism of carbendazim has always been a challenge. In this paper, the degradation mechanism of carbendazim by •OH in aqueous solution has been explored using density functional theory (DFT) calculations. On account of the structural and electronic characteristics analysis, the nucleophilic aromatic substitution, dehydrogenation oxidation, and decarboxylation degradation pathways were mainly investigated. These degradation reactions may produce hydroxyl substitution products, oxidized aldehyde and carboxyl products, and decarboxylated carbamic acid products. Computational studies demonstrated that these possible degradation reactions are facile to take place kinetically and have large thermodynamic driving forces, indicating the feasibility of the relevant degradation pathways. Additionally, the ecological risk of carbendazim and its possible degradation products was evaluated, showing that the acute toxicity of degradation products decreases in varying degrees compared with that of carbendazim. The comprehensive mechanistic studies open an avenue for the understanding on the degradation of organic pollutants such as benzimidazole pollutants on molecular level.
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Affiliation(s)
- Wenjing Liu
- Key Laboratory for Environmental Factors Control of Agro-product Quality Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China.
| | - Ye Li
- Key Laboratory for Environmental Factors Control of Agro-product Quality Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
| | - Yajun Wang
- Key Laboratory for Environmental Factors Control of Agro-product Quality Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
| | - Yujie Zhao
- Key Laboratory for Environmental Factors Control of Agro-product Quality Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
| | - Yaping Xu
- Key Laboratory for Environmental Factors Control of Agro-product Quality Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China.
| | - Xiaowei Liu
- Key Laboratory for Environmental Factors Control of Agro-product Quality Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China.
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10
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Cheng Z, Chen Q, Liu S, Liu Y, Ren Y, Zhang X, Shen Z. The investigation of influencing factors on the degradation of sulfonamide antibiotics in iron-impregnated biochar-activated urea-hydrogen peroxide system: A QSAR study. JOURNAL OF HAZARDOUS MATERIALS 2022; 430:128269. [PMID: 35158249 DOI: 10.1016/j.jhazmat.2022.128269] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 12/16/2021] [Accepted: 01/11/2022] [Indexed: 06/14/2023]
Abstract
Iron-impregnated biochar-activated urea-hydrogen peroxide (FB-activated UHP) is a potential in-situ technology for simultaneously reducing soil sulfonamide antibiotic contaminants and improving soil fertility. To better understand the degradation of sulfonamide antibiotics by FB-activated UHP, a two-dimensional quantitative structure-activity relationship (2D-QSAR) model based on quantum chemical parameters and a three-dimensional QSAR (3D-QSAR) model based on molecular force field were developed to investigate the factors influencing the removal efficiencies (Re%). The optimal 2D-QSAR model was Re%= 0.858-8.930 E-5 EB3LYP-0.175 f(+)x with the evaluation indices of R2= 0.732, q2= 0.571, and Qext2= 0.673. The given 2D-QSAR model indicated that the molecular size (EB3LYP) and Fukui index with respect to nucleophilic attack (f(+)) were intrinsic factors influencing Re%. Three degradation pathways were subsequently proposed based on the f(+) distribution. Compared to the 2D-QSAR model, the developed 3D-QSAR model exhibited a better predictive ability, with the evaluation indices of R2= 0.989, q2= 0.696, and SEE= 0.001. The analysis of field contribution rates suggested that electrostatic field (48.2%), hydrophobic field (25.3%), and hydrogen-bond acceptor field (12.7%) were the main factors influencing Re%. These findings generated critical information for evaluating the degradation mechanisms/rules and provided theoretical bases for initially estimating the Re% of sulfonamide antibiotics undergoing FB-activated UHP process.
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Affiliation(s)
- Zhiwen Cheng
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, PR China
| | - Qincheng Chen
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, PR China
| | - Shiqiang Liu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, PR China
| | - Yawei Liu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, PR China
| | - Yuanyang Ren
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, PR China
| | - Xuxiang Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, Environmental Health Research Center, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Zhemin Shen
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, PR China; State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, Shanghai 200240, PR China; Shanghai Engineering Research Center of Solid Waste Treatment and Resource Recovery, Shanghai 200240, PR China.
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11
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Morán-González L, Besora M, Maseras F. Seeking the Optimal Descriptor for S N2 Reactions through Statistical Analysis of Density Functional Theory Results. J Org Chem 2021; 87:363-372. [PMID: 34935370 DOI: 10.1021/acs.joc.1c02387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Bimolecular nucleophilic substitution is one of the fundamental reactions in organic chemistry, yet there is still knowledge to be gained on the role of the nucleophile and the substrate. A statistical treatment of over 600 density functional theory (DFT)-computed barriers for bimolecular nucleophilic substitution at methyl derivatives (SN2@C) leads to the identification of numerical descriptors that best represent the entering and leaving ability of 26 different nucleophiles. The treatment is based on singular value decomposition (SVD) of a matrix of computed energy barriers. The current work represents the extension to a problem of reactivity of the hidden descriptor methodology that we had previously developed for the thermodynamic problem of bond dissociation energies in transition-metal complexes. The analysis of the results shows that a single descriptor is sufficient. This hidden descriptor has different values for nucleophilic and leaving abilities and, contrary to expectation, does not correlate especially well with either frontier molecular orbital descriptors or solvation descriptors. In contrast, it correlates with other thermodynamic and geometric parameters. This statistical procedure can be in principle extended to additional chemical fragments and other reactions.
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Affiliation(s)
- Lucía Morán-González
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avgda. Països Catalans, 16, 43007 Tarragona, Catalonia, Spain
| | - Maria Besora
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, c/Marcel·lí Domingo s/n, 43007 Tarragona, Catalonia, Spain
| | - Feliu Maseras
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avgda. Països Catalans, 16, 43007 Tarragona, Catalonia, Spain
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12
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Abstract
The pair coupled cluster doubles (pCCD) ansatz represents an inexpensive but accurate single-reference method to describe multi-reference problems. By construction, pCCD remains, however, applicable to closed-shell systems. For the first time, we present extensions to pCCD that allow us to target open-shell molecules with up to 4 unpaired electrons. Although requiring only modest computational cost, our methods approach chemical accuracy for some challenging cases, while their performance is comparable to more expensive models like DMRG or CCSD(T).
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Affiliation(s)
- Katharina Boguslawski
- Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University in Toruń, ul. Grudziądzka 5, 87-100 Toruń, Poland.
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13
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Li Y, Jiang L, Wang R, Wu P, Liu J, Yang S, Liang J, Lu G, Zhu N. Kinetics and mechanisms of phenolic compounds by Ferrate(VI) assisted with density functional theory. JOURNAL OF HAZARDOUS MATERIALS 2021; 415:125563. [PMID: 33721780 DOI: 10.1016/j.jhazmat.2021.125563] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 02/23/2021] [Accepted: 02/26/2021] [Indexed: 06/12/2023]
Abstract
In this paper, Phenol, 4-Chlorophenol (4-CP), 2,4-Dichlorophenol (2,4-DCP) and 2,4,6-Trichlorophenol (2,4,6-TCP) were selected as model pollutants to explore the oxidant mechanism by ferrate (Fe(VI)). The reactions between ferrate (1000 μM) and four phenolic compounds (100 μM) were conformed to the second-order reaction kinetics at pH 9.2, and the order of kobs followed as: k4-CP (129 M-1 s-1) > k2,4-DCP (96 M-1 s-1) > k2,4,6-TCP (44 M-1 s-1) > kPhenol (12 M-1 s-1). Meanwhile, the degradation rates of all four compounds by Fe(VI) increased with increased pH (3.1-9.2). A total of 14 degradation products were identified by Liquid chromatography-Time-of-Flight-Mass Spectrometry (LC-TOF-MS), and two pathways including hydroxylation of benzene ring and substitution of chlorine atom were proposed. Hydroxyl radicals, played a vital role during the degradation of phenolic compounds. Moreover, density functional theory calculations were used to explore the degradation mechanisms. The results showed that the hydroxyl radical was more favorable to substitute chlorine atom than hydrogen atom, and the substitution on ortho-position was more favorable than para-position for all four compounds. The findings of this study could greatly improve our understanding on the degradation mechanism of chlorophenol-like compounds by Fe(VI) for environmental remediation.
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Affiliation(s)
- Yihao Li
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Lu Jiang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Rui Wang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; South China Institute of Environmental Sciences, Ministry of Environmental Protection (MEP), Guangzhou 510655, China
| | - Pingxiao Wu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, Guangzhou 510006, PR China; Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou 510006, PR China; Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal, Guangzhou 510006, PR China.
| | - Juan Liu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Shanshan Yang
- School of Earth and Space Sciences, Peking University, Beijing 100871, PR China
| | - Jiahao Liang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Guining Lu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Nengwu Zhu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, PR China
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14
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Yue Y, Fan J, Xin G, Huang Q, Wang JB, Li Y, Zhang Q, Wang W. Comprehensive Understanding of Fluoroacetate Dehalogenase-Catalyzed Degradation of Fluorocarboxylic Acids: A QM/MM Approach. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:9817-9825. [PMID: 34080849 DOI: 10.1021/acs.est.0c08811] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Fluorochemicals are persistent, bioaccumulative, and toxic compounds that are widely tributed in the environment. Developing efficient biodegradation strategies to decompose the fluorochemicals via breaking the inert C-F bonds presents a holistic challenge. As a promising biodegradation enzyme candidate, fluoroacetate dehalogenase (FAcD) has been reported as the only non-metallic enzyme to catalyze the cleavage of the strong C-F bond. Here, we systematically investigated the catalytic actions of FAcD toward its natural substrate fluoroacetate using molecular dynamics simulations and quantum mechanism/molecular mechanism calculations. We propose that the enzymatic transformation involves four elementary steps, (I) C-F bond activation, (II) nucleophilic attack, (III) C-O bond cleavage, and (IV) proton transfer. Our results show that nucleophilic attack is the rate-determining step. However, for difluoroacetate and trifluoroacetate, C-F bond activation, instead of nucleophilic attack, becomes the rate-determining step. We show that FAcD, originally recognized as α-fluorocarboxylic acid degradation enzyme, can catalyze the defluorination of difluoroacetate to glyoxylate, which is captured by our high-resolution mass spectrometry experiments. In addition, we employed amino acid electrostatic analysis method to screen potential mutation hotspots for tuning FAcD's electrostatic environment to favor substrate conversion. The comprehensive understanding of catalytic mechanism will inform a rational enzyme engineering strategy to degrade fluorochemicals for benefits of environmental sustainability.
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Affiliation(s)
- Yue Yue
- Environment Research Institute, Shandong University, Qingdao 266237, P. R. China
| | - Jiaqian Fan
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China
| | - Guoqing Xin
- Wuhan National High Magnetic Field Center (WHMFC), Huazhong University of Science and Technology, Wuhan 430074, P. R. China
| | - Qun Huang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China
| | - Jian-Bo Wang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China
| | - Yanwei Li
- Environment Research Institute, Shandong University, Qingdao 266237, P. R. China
| | - Qingzhu Zhang
- Environment Research Institute, Shandong University, Qingdao 266237, P. R. China
| | - Wenxing Wang
- Environment Research Institute, Shandong University, Qingdao 266237, P. R. China
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15
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Yong H, Xu X, Ruddock JM, Stankus B, Carrascosa AM, Zotev N, Bellshaw D, Du W, Goff N, Chang Y, Boutet S, Carbajo S, Koglin JE, Liang M, Robinson JS, Kirrander A, Minitti MP, Weber PM. Ultrafast X-ray scattering offers a structural view of excited-state charge transfer. Proc Natl Acad Sci U S A 2021; 118:e2021714118. [PMID: 33947814 PMCID: PMC8126834 DOI: 10.1073/pnas.2021714118] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Intramolecular charge transfer and the associated changes in molecular structure in N,N'-dimethylpiperazine are tracked using femtosecond gas-phase X-ray scattering. The molecules are optically excited to the 3p state at 200 nm. Following rapid relaxation to the 3s state, distinct charge-localized and charge-delocalized species related by charge transfer are observed. The experiment determines the molecular structure of the two species, with the redistribution of electron density accounted for by a scattering correction factor. The initially dominant charge-localized state has a weakened carbon-carbon bond and reorients one methyl group compared with the ground state. Subsequent charge transfer to the charge-delocalized state elongates the carbon-carbon bond further, creating an extended 1.634 Å bond, and also reorients the second methyl group. At the same time, the bond lengths between the nitrogen and the ring-carbon atoms contract from an average of 1.505 to 1.465 Å. The experiment determines the overall charge transfer time constant for approaching the equilibrium between charge-localized and charge-delocalized species to 3.0 ps.
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Affiliation(s)
- Haiwang Yong
- Department of Chemistry, Brown University, Providence, RI 02912
| | - Xuan Xu
- Department of Chemistry, Brown University, Providence, RI 02912
| | | | - Brian Stankus
- Department of Chemistry and Biochemistry, Western Connecticut State University, Danbury, CT 06810
| | | | - Nikola Zotev
- EaStCHEM, School of Chemistry, University of Edinburgh, Edinburgh EH9 3FJ, United Kingdom
- Center for Science at Extreme Conditions, University of Edinburgh, Edinburgh EH9 3FJ, United Kingdom
| | - Darren Bellshaw
- EaStCHEM, School of Chemistry, University of Edinburgh, Edinburgh EH9 3FJ, United Kingdom
- Center for Science at Extreme Conditions, University of Edinburgh, Edinburgh EH9 3FJ, United Kingdom
| | - Wenpeng Du
- Department of Chemistry, Brown University, Providence, RI 02912
| | - Nathan Goff
- Department of Chemistry, Brown University, Providence, RI 02912
| | - Yu Chang
- Department of Chemistry, Brown University, Providence, RI 02912
| | - Sébastien Boutet
- Linac Coherent Light Source, Stanford Linear Accelerator Center National Accelerator Laboratory, Menlo Park, CA 94025
| | - Sergio Carbajo
- Linac Coherent Light Source, Stanford Linear Accelerator Center National Accelerator Laboratory, Menlo Park, CA 94025
| | - Jason E Koglin
- Linac Coherent Light Source, Stanford Linear Accelerator Center National Accelerator Laboratory, Menlo Park, CA 94025
| | - Mengning Liang
- Linac Coherent Light Source, Stanford Linear Accelerator Center National Accelerator Laboratory, Menlo Park, CA 94025
| | - Joseph S Robinson
- Linac Coherent Light Source, Stanford Linear Accelerator Center National Accelerator Laboratory, Menlo Park, CA 94025
| | - Adam Kirrander
- EaStCHEM, School of Chemistry, University of Edinburgh, Edinburgh EH9 3FJ, United Kingdom;
- Center for Science at Extreme Conditions, University of Edinburgh, Edinburgh EH9 3FJ, United Kingdom
| | - Michael P Minitti
- Linac Coherent Light Source, Stanford Linear Accelerator Center National Accelerator Laboratory, Menlo Park, CA 94025
| | - Peter M Weber
- Department of Chemistry, Brown University, Providence, RI 02912;
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16
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Gałyńska M, Ásgeirsson V, Jónsson H, Bjornsson R. Localized and Delocalized States of a Diamine Cation: Resolution of a Controversy. J Phys Chem Lett 2021; 12:1250-1255. [PMID: 33497225 PMCID: PMC7875508 DOI: 10.1021/acs.jpclett.0c03651] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 01/20/2021] [Indexed: 06/12/2023]
Abstract
Recent Rydberg spectroscopy measurements of a diamine molecule, N,N'-dimethylpiperazine (DMP), indicate the existence of a localized electronic state as well as a delocalized electronic state. This implies that the cation, DMP+, can similarly have its positive charge either localized on one of the N atoms or delocalized over both. This interpretation of the experiments has, however, been questioned based on coupled cluster calculations. In this article, results of high-level multireference configuration interaction calculations are presented where a localized state of DMP+ is indeed found to be present with an energy barrier separating it from the delocalized state. The energy difference between the two states is in excellent agreement with the experimental estimate. The results presented here, therefore, support the original interpretation of the experiments and illustrate a rare shortcoming of CCSD(T), the "gold standard" of quantum chemistry. These results have implications for the development of density functionals, as most functionals fail to produce the localized state.
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Affiliation(s)
- Marta Gałyńska
- Science
Institute and Faculty of Physical Sciences, VR-III, University of Iceland, 107 Reykjavík, Iceland
- Institute
of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100 Toruń, Poland
| | - Vilhjálmur Ásgeirsson
- Science
Institute and Faculty of Physical Sciences, VR-III, University of Iceland, 107 Reykjavík, Iceland
| | - Hannes Jónsson
- Science
Institute and Faculty of Physical Sciences, VR-III, University of Iceland, 107 Reykjavík, Iceland
| | - Ragnar Bjornsson
- Max-Planck
Institute for Chemical Energy Conversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
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17
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Alipour M, Khorrami M. Pauli energy and information-theoretic approach for evaluating dynamic and nondynamic electron correlation. Theor Chem Acc 2020. [DOI: 10.1007/s00214-020-02689-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Fractional occupation numbers and self‐interaction correction‐scaling methods with the Fermi‐Löwdin orbital self‐interaction correction approach. J Comput Chem 2020; 41:1200-1208. [DOI: 10.1002/jcc.26168] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Accepted: 01/19/2020] [Indexed: 11/07/2022]
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19
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Faria B, Bernardes CES, Silvestre N, Canongia Lopes JN. C13 – a new empirical force field to characterize the mechanical behavior of carbyne chains. Phys Chem Chem Phys 2020; 22:758-771. [DOI: 10.1039/c9cp03867a] [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
The C13 empirical potential is developed for accurate modeling of mechanical properties of carbyne specifically taking in account bond alternation.
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Affiliation(s)
- Bruno Faria
- Centro de Química Estrutural
- Department of Chemical and Biological Engineering
- Instituto Superior Técnico
- Universidade de Lisboa
- Portugal
| | - Carlos E. S. Bernardes
- Centro de Química Estrutural
- Department of Chemical and Biological Engineering
- Instituto Superior Técnico
- Universidade de Lisboa
- Portugal
| | - Nuno Silvestre
- IDMEC
- Dept. of Mechanical Engineering
- Instituto Superior Técnico
- Universidade de Lisboa
- Portugal
| | - José N. Canongia Lopes
- Centro de Química Estrutural
- Department of Chemical and Biological Engineering
- Instituto Superior Técnico
- Universidade de Lisboa
- Portugal
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20
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Li Y, Yue Y, Zhang H, Yang Z, Wang H, Tian S, Wang JB, Zhang Q, Wang W. Harnessing fluoroacetate dehalogenase for defluorination of fluorocarboxylic acids: in silico and in vitro approach. ENVIRONMENT INTERNATIONAL 2019; 131:104999. [PMID: 31319293 DOI: 10.1016/j.envint.2019.104999] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 07/02/2019] [Accepted: 07/07/2019] [Indexed: 06/10/2023]
Abstract
Widely distributed fluorocarboxylic acids have aroused worldwide environmental concerns due to its toxicity, persistence, and bioaccumulation. Enzyme-based eco-friendly biodegradation techniques have become increasingly important in treating fluorocarboxylic acids. Here we utilized in silico and in vitro approaches to investigate the defluorination mechanism of fluoroacetate dehalogenase (FAcD) toward monofluoropropionic acids at atomic-level. The experimentally determined kcat and kM for defluorination of 2-fluoropropionic acid are 330 ± 60 min-1 and 6.12 ± 0.13 mM. The in silico results demonstrated positive/negative correlations between activation barriers and structural parameters (e.g. distance and angle) under different enzymatic conformations. We also screened computationally and tested in vitro (enzyme assay and kinetic study) the catalytic proficiency of FAcD toward polyfluoropropionic acids and perfluoropropionic acids which are known to be challenging for enzymatic degradation. The results revealed potential degradation activity of FAcD enzyme toward 2,3,3,3-tetrafluoropropionic acids. Our work will initiate the development of a new "integrated approach" for enzyme engineering to degrade environmentally persistent fluorocarboxylic acids.
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Affiliation(s)
- Yanwei Li
- Environment Research Institute, Shandong University, Qingdao 266237, PR China.
| | - Yue Yue
- Environment Research Institute, Shandong University, Qingdao 266237, PR China
| | - Hongxia Zhang
- Key Laboratory of Phytochemistry R&D of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, PR China; Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, PR China
| | - Zhongyue Yang
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
| | - Hui Wang
- School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Shaixiao Tian
- Key Laboratory of Phytochemistry R&D of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, PR China; Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, PR China
| | - Jian-Bo Wang
- Key Laboratory of Phytochemistry R&D of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, PR China; Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, PR China.
| | - Qingzhu Zhang
- Environment Research Institute, Shandong University, Qingdao 266237, PR China.
| | - Wenxing Wang
- Environment Research Institute, Shandong University, Qingdao 266237, PR China
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21
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Cheng X, Jónsson E, Jónsson H, Weber PM. Reply to: "The diamine cation is not a chemical example where density functional theory fails". Nat Commun 2018; 9:5348. [PMID: 30559404 PMCID: PMC6297217 DOI: 10.1038/s41467-018-07683-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 11/06/2018] [Indexed: 11/09/2022] Open
Affiliation(s)
- Xinxin Cheng
- Department of Chemistry, Brown University, Providence, RI, 02912, United States.,The Hamburg Centre for Ultrafast Imaging (CUI), Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany.,Max Planck Institute for the Structure and Dynamics of Matter (MPSD), Luruper Chaussee 149, 22761, Hamburg, Germany
| | - Elvar Jónsson
- Faculty of Physical Sciences, VR-III, University of Iceland, 107, Reykjavík, Iceland
| | - Hannes Jónsson
- Department of Chemistry, Brown University, Providence, RI, 02912, United States.,Faculty of Physical Sciences, VR-III, University of Iceland, 107, Reykjavík, Iceland
| | - Peter M Weber
- Department of Chemistry, Brown University, Providence, RI, 02912, United States.
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