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Liu Y, Li J. Permutation-Invariant-Polynomial Neural-Network-Based Δ-Machine Learning Approach: A Case for the HO 2 Self-Reaction and Its Dynamics Study. J Phys Chem Lett 2022; 13:4729-4738. [PMID: 35609295 DOI: 10.1021/acs.jpclett.2c01064] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Δ-machine learning, or the hierarchical construction scheme, is a highly cost-effective method, as only a small number of high-level ab initio energies are required to improve a potential energy surface (PES) fit to a large number of low-level points. However, there is no efficient and systematic way to select as few points as possible from the low-level data set. We here propose a permutation-invariant-polynomial neural-network (PIP-NN)-based Δ-machine learning approach to construct full-dimensional accurate PESs of complicated reactions efficiently. Particularly, the high flexibility of the NN is exploited to efficiently sample points from the low-level data set. This approach is applied to the challenging case of a HO2 self-reaction with a large configuration space. Only 14% of the DFT data set is used to successfully bring a newly fitted DFT PES to the UCCSD(T)-F12a/AVTZ quality. Then, the quasiclassical trajectory (QCT) calculations are performed to study its dynamics, particularly the mode specificity.
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Affiliation(s)
- Yang Liu
- School of Chemistry and Chemical Engineering & Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, China
| | - Jun Li
- School of Chemistry and Chemical Engineering & Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, China
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Li J, Wang L, Wang L. Computational Study on the Reaction of β-Hydroxyethylperoxy Radical with HO 2 and Effects of Water Vapor. J Phys Chem A 2022; 126:2234-2243. [PMID: 35362984 DOI: 10.1021/acs.jpca.1c09009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reaction of β-hydroxyethylperoxy radical (β-HEP) and HO2 with and without water was studied using quantum chemistry and kinetic calculations. The main products are HOCH2CH2OOH and 3O2 for the reaction with and without water, while all other reaction channels can be neglected. The rate coefficients of the reaction follow negative temperature dependence. The pseudo-second-order rate coefficients are 2-4 orders of magnitude smaller for the reaction with saturated water vapor, indicating the negligible contribution of water in this reaction. This is probably also true for other peroxy radicals (except for HO2), indicating that a large part of previous results on the water enhancement of reaction rate coefficients might have overestimated the influence of water.
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Affiliation(s)
- Junjie Li
- School of Chemistry & Chemical Engineering, South China University of Technology, Guangzhou 510640, China
| | - Lingyu Wang
- School of Chemistry & Chemical Engineering, South China University of Technology, Guangzhou 510640, China
| | - Liming Wang
- School of Chemistry & Chemical Engineering, South China University of Technology, Guangzhou 510640, China.,Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou 510006, China
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Kuwata KT, DeVault MP, Claypool DJ. Improved Computational Modeling of the Kinetics of the Acetylperoxy + HO 2 Reaction. Faraday Discuss 2022; 238:589-618. [DOI: 10.1039/d2fd00030j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The acetylperoxy + HO2 reaction has multiple impacts on the troposphere, with a triplet pathway leading to peracetic acid + O2 (reaction 1a) competing with singlet pathways leading to acetic...
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Feng B, Sun C, Zhao W, Zhang S. A theoretical investigation on the atmospheric degradation of the radical: reactions with NO, NO 2, and NO 3. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2020; 22:1554-1565. [PMID: 32608429 DOI: 10.1039/d0em00112k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The radical is the key intermediate in the atmospheric oxidation of benzaldehyde, and its further chemistry contributes to local air pollution. The reaction mechanisms of the radical with NO, NO2, and NO3 were studied by quantum chemistry calculations at the CCSD(T)/CBS//M06-2X/def2-TZVP level of theory. The explicit potential energy curves were provided in order to reveal the atmospheric fate of the radical comprehensively. The main products of the reaction of with NO are predicted to be , CO2 and NO2. The reaction of with NO2 is reversible, and its main product would be C6H5C(O)O2NO2 which was predicted to be more stable than PAN (peroxyacetyl nitrate) at room temperature. The decomposition of C6H5C(O)O2NO2 at different ambient temperatures would be a potential long-range transport source of NOx in the atmosphere. The predominant products of the reaction are predicted to be C6H5C(O)O2H, C6H5C(O)OH, O2 and O3, while HO˙ is of minor importance. So, the reaction of with would be an important source of ozone and carboxylic acids in the local atmosphere, and has less contribution to the regeneration of HO˙ radicals. The reaction of with NO3 should mainly produce , CO2, O2 and NO2, which might play an important role in atmospheric chemistry of peroxy radicals at night, but has less contribution to the night-time conversion of ( and RO˙) to ( and HO˙) in the local atmosphere. The results above are in good accordance with the reported experimental observations.
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Affiliation(s)
- Bo Feng
- School of Chemistry and Chemical Engineering, Key Laboratory of Cluster Science of Ministry of Education, Beijing Institute of Technology, South Zhongguancun Street # 5, Haidian District, Beijing, 100081, P. R. China.
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Zhang T, Bi X, Wen M, Liu S, Chai G, Zeng Z, Wang R, Wang W, Long B. The HO 4H → O 3 + H 2O reaction catalysed by acidic, neutral and basic catalysts in the troposphere. Mol Phys 2020. [DOI: 10.1080/00268976.2019.1673912] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Tianlei Zhang
- School of Chemical & Environment Science, Shaanxi Key Laboratory of Catalysis, Institute of Theoretical and Computational Chemistry, Shaanxi University of Technology, Hanzhong, People’s Republic of China
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, People’s Republic of China
| | - Xiujuan Bi
- School of Chemical & Environment Science, Shaanxi Key Laboratory of Catalysis, Institute of Theoretical and Computational Chemistry, Shaanxi University of Technology, Hanzhong, People’s Republic of China
| | - Mingjie Wen
- School of Chemical & Environment Science, Shaanxi Key Laboratory of Catalysis, Institute of Theoretical and Computational Chemistry, Shaanxi University of Technology, Hanzhong, People’s Republic of China
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, People’s Republic of China
| | - Shuai Liu
- School of Chemical & Environment Science, Shaanxi Key Laboratory of Catalysis, Institute of Theoretical and Computational Chemistry, Shaanxi University of Technology, Hanzhong, People’s Republic of China
| | - Guang Chai
- School of Chemical & Environment Science, Shaanxi Key Laboratory of Catalysis, Institute of Theoretical and Computational Chemistry, Shaanxi University of Technology, Hanzhong, People’s Republic of China
| | - Zhaopeng Zeng
- School of Chemical & Environment Science, Shaanxi Key Laboratory of Catalysis, Institute of Theoretical and Computational Chemistry, Shaanxi University of Technology, Hanzhong, People’s Republic of China
| | - Rui Wang
- School of Chemical & Environment Science, Shaanxi Key Laboratory of Catalysis, Institute of Theoretical and Computational Chemistry, Shaanxi University of Technology, Hanzhong, People’s Republic of China
| | - Wenliang Wang
- Key Laboratory for Macromolecular Science of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi’an, People’s Republic of China
| | - Bo Long
- School of Materials Science and Engineering, Guizhou Minzu University, Guiyang, People’s Republic of China
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Feng B, Shu Y, Zhang S. Theoretical study of PhCH2O4CH2Ph: intermediate in the PhCH2O2 self-reaction. Struct Chem 2020. [DOI: 10.1007/s11224-019-01383-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Gordeev AV, Seliverstov AF, Ershov BG. Solubility of Ozone in Aqueous Solutions of Oxalic Acid and Potassium and Sodium Nitrates: Determination of the Anion-Specific Parameter for the Oxalate Ion in a Model for the Solubility of Gases in Electrolyte Solutions. THEORETICAL FOUNDATIONS OF CHEMICAL ENGINEERING 2019. [DOI: 10.1134/s0040579519050282] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Borden WT, Hoffmann R, Stuyver T, Chen B. Dioxygen: What Makes This Triplet Diradical Kinetically Persistent? J Am Chem Soc 2017; 139:9010-9018. [PMID: 28613073 DOI: 10.1021/jacs.7b04232] [Citation(s) in RCA: 105] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Experimental heats of formation and enthalpies obtained from G4 calculations both find that the resonance stabilization of the two unpaired electrons in triplet O2, relative to the unpaired electrons in two hydroxyl radicals, amounts to 100 kcal/mol. The origin of this huge stabilization energy is described within the contexts of both molecular orbital (MO) and valence-bond (VB) theory. Although O2 is a triplet diradical, the thermodynamic unfavorability of both its hydrogen atom abstraction and oligomerization reactions can be attributed to its very large resonance stabilization energy. The unreactivity of O2 toward both these modes of self-destruction maintains its abundance in the ecosphere and thus its availability to support aerobic life. However, despite the resonance stabilization of the π system of triplet O2, the weakness of the O-O σ bond makes reactions of O2, which eventually lead to cleavage of this bond, very favorable thermodynamically.
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Affiliation(s)
- Weston Thatcher Borden
- Department of Chemistry and the Center for Advanced Scientific Computing and Modeling, University of North Texas , 1155 Union Circle, #305070, Denton, Texas 76203-5017, United States
| | - Roald Hoffmann
- Department of Chemistry and Chemical Biology, Cornell University , Baker Laboratory, Ithaca, New York 14853-1301, United States
| | - Thijs Stuyver
- Algemene Chemie, Vrije Universiteit Brussel , Pleinlaan 2, 1050 Brussels, Belgium.,Research Foundation-Flanders (FWO-Vlaanderen) , Egmontstraat 5, 1000 Brussels, Belgium
| | - Bo Chen
- Department of Chemistry and Chemical Biology, Cornell University , Baker Laboratory, Ithaca, New York 14853-1301, United States
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