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Pasik D, Frandsen BN, Meder M, Iyer S, Kurtén T, Myllys N. Gas-Phase Oxidation of Atmospherically Relevant Unsaturated Hydrocarbons by Acyl Peroxy Radicals. J Am Chem Soc 2024; 146:13427-13437. [PMID: 38712858 DOI: 10.1021/jacs.4c02523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
This study assesses the atmospheric impact of reactions between unsaturated hydrocarbons such as isoprene and monoterpenes and peroxy radicals containing various functional groups. We find that reactions between alkenes and acyl peroxy radicals have reaction rates high enough to be feasible in the atmosphere and lead to high molar mass accretion products. Moreover, the reaction between unsaturated hydrocarbons and acyl peroxy radicals leads to an alkyl radical, to which molecular oxygen rapidly adds. This finding is confirmed by both theoretical calculations and experiments. The formed perester peroxy radical may either undergo further H-shift reactions or react bimolecularly. The multifunctional oxygenated compounds formed through acyl peroxy radical + alkene reactions are potentially important contributors to particle formation and growth. Thus, acyl peroxy radical-initiated oxidation chemistry may need to be included in atmospheric models.
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Affiliation(s)
- Dominika Pasik
- Department of Chemistry, University of Helsinki, Helsinki 00014, Finland
- Institute for Atmospheric and Earth System Research, University of Helsinki, Helsinki 00014, Finland
| | - Benjamin N Frandsen
- Department of Chemistry, University of Helsinki, Helsinki 00014, Finland
- Aerosol Physics Laboratory, Tampere University, Tampere 33014, Finland
| | - Melissa Meder
- Institute for Atmospheric and Earth System Research, University of Helsinki, Helsinki 00014, Finland
| | - Siddharth Iyer
- Aerosol Physics Laboratory, Tampere University, Tampere 33014, Finland
| | - Theo Kurtén
- Department of Chemistry, University of Helsinki, Helsinki 00014, Finland
- Institute for Atmospheric and Earth System Research, University of Helsinki, Helsinki 00014, Finland
| | - Nanna Myllys
- Department of Chemistry, University of Helsinki, Helsinki 00014, Finland
- Institute for Atmospheric and Earth System Research, University of Helsinki, Helsinki 00014, Finland
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Dash MR, Muthiah B, Mishra SS, Annaraj B, Lin KC. Kinetic insights into ethynyl radical with isobutane and neopentane. Theor Chem Acc 2021. [DOI: 10.1007/s00214-021-02833-x] [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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Xu Q, Kang J, Chen X, Li J. Catalytic effect of water on the HO 3 + NO formations from the HNO + O 3reaction in tropospheric conditions. MOLECULAR SIMULATION 2020. [DOI: 10.1080/08927022.2020.1732962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Qiong Xu
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, People’s Republic of China
- Shaanxi Key Laboratory of Catalysis, Institute of Theoretical and Computational Chemistry, Shaanxi University of Technology, Hanzhong, People’s Republic of China
| | - Jiaxin Kang
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, People’s Republic of China
| | - Xuenian Chen
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, People’s Republic of China
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, People’s Republic of China
| | - Jun Li
- Key Laboratory of Organic Optoelectronics, Molecular Engineering of the Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, People’s Republic of China
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Baidya B, Lily M, Patgiri D, Hynniewta S, Chandra AK. CHF 2CF 2OCHF 2: conformational analysis and direct dynamics study of its reaction with Cl atoms and atmospheric fate. NEW J CHEM 2020. [DOI: 10.1039/c9nj06069c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Conformers of CHF2CF2OCHF2 are identified, and the kinetics of its reaction with Cl atoms and final atmospheric degradation products are studied to assess atmospheric impact.
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Affiliation(s)
- Bidisha Baidya
- Centre for Advanced Studies in Chemistry
- North – Eastern Hill University
- Shillong
- India
| | - Makroni Lily
- Centre for Advanced Studies in Chemistry
- North – Eastern Hill University
- Shillong
- India
| | - Dimpal Patgiri
- Centre for Advanced Studies in Chemistry
- North – Eastern Hill University
- Shillong
- India
| | - Shemphang Hynniewta
- Centre for Advanced Studies in Chemistry
- North – Eastern Hill University
- Shillong
- India
| | - Asit K. Chandra
- Centre for Advanced Studies in Chemistry
- North – Eastern Hill University
- Shillong
- India
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Computational Studies on the Thermodynamic and Kinetic Parameters of Oxidation of 2-Methoxyethanol Biofuel via H-Atom Abstraction by Methyl Radical. Sci Rep 2019; 9:15361. [PMID: 31653887 PMCID: PMC6814854 DOI: 10.1038/s41598-019-51544-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 09/28/2019] [Indexed: 11/08/2022] Open
Abstract
In this work, a theoretical investigation of thermochemistry and kinetics of the oxidation of bifunctional 2-Methoxyethanol (2ME) biofuel using methyl radical was introduced. Potential-energy surface for various channels for the oxidation of 2ME was studied at density function theory (M06-2X) and ab initio CBS-QB3 levels of theory. H-atom abstraction reactions, which are essential processes occurring in the initial stages of the combustion or oxidation of organic compounds, from different sites of 2ME were examined. A similar study was conducted for the isoelectronic n-butanol to highlight the consequences of replacing the ϒ CH2 group by an oxygen atom on the thermodynamic and kinetic parameters of the oxidation processes. Rate coefficients were calculated from the transition state theory. Our calculations show that energy barriers for n-butanol oxidation increase in the order of α ‹ O ‹ ϒ ‹ β ‹ ξ, which are consistent with previous data. However, for 2ME the energy barriers increase in the order α ‹ β ‹ ξ ‹ O. At elevated temperatures, a slightly high total abstraction rate is observed for the bifunctional 2ME (4 abstraction positions) over n-butanol (5 abstraction positions).
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Pei L, Dong K, Tang Y, Zhang B, Yu C, Li W. A density functional theory study of the decomposition mechanism of nitroglycerin. J Mol Model 2017; 23:269. [PMID: 28828550 DOI: 10.1007/s00894-017-3440-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2017] [Accepted: 08/07/2017] [Indexed: 11/30/2022]
Abstract
The detailed decomposition mechanism of nitroglycerin (NG) in the gas phase was studied by examining reaction pathways using density functional theory (DFT) and canonical variational transition state theory combined with a small-curvature tunneling correction (CVT/SCT). The mechanism of NG autocatalytic decomposition was investigated at the B3LYP/6-31G(d,p) level of theory. Five possible decomposition pathways involving NG were identified and the rate constants for the pathways at temperatures ranging from 200 to 1000 K were calculated using CVT/SCT. There was found to be a lower energy barrier to the β-H abstraction reaction than to the α-H abstraction reaction during the initial step in the autocatalytic decomposition of NG. The decomposition pathways for CHOCOCHONO2 (a product obtained following the abstraction of three H atoms from NG by NO2) include O-NO2 cleavage or isomer production, meaning that the autocatalytic decomposition of NG has two reaction pathways, both of which are exothermic. The rate constants for these two reaction pathways are greater than the rate constants for the three pathways corresponding to unimolecular NG decomposition. The overall process of NG decomposition can be divided into two stages based on the NO2 concentration, which affects the decomposition products and reactions. In the first stage, the reaction pathway corresponding to O-NO2 cleavage is the main pathway, but the rates of the two autocatalytic decomposition pathways increase with increasing NO2 concentration. However, when a threshold NO2 concentration is reached, the NG decomposition process enters its second stage, with the two pathways for NG autocatalytic decomposition becoming the main and secondary reaction pathways.
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Affiliation(s)
- Liguan Pei
- Department of Aircraft Engineering, Naval Aeronautical Engineering University, No. 188, Erma Road, Zhifu District, Yantai City, Shandong Province, 264001, China.
| | - Kehai Dong
- Department of Aircraft Engineering, Naval Aeronautical Engineering University, No. 188, Erma Road, Zhifu District, Yantai City, Shandong Province, 264001, China
| | - Yanhui Tang
- Department of Aircraft Engineering, Naval Aeronautical Engineering University, No. 188, Erma Road, Zhifu District, Yantai City, Shandong Province, 264001, China
| | - Bo Zhang
- Department of Aircraft Engineering, Naval Aeronautical Engineering University, No. 188, Erma Road, Zhifu District, Yantai City, Shandong Province, 264001, China
| | - Chang Yu
- Department of Aircraft Engineering, Naval Aeronautical Engineering University, No. 188, Erma Road, Zhifu District, Yantai City, Shandong Province, 264001, China
| | - Wenzuo Li
- College of Chemistry and Chemical Engineering, Yantai University, Yantai, 264005, China
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Zhang S, Sun J, Cao H, Qiao Q, He M. Computational study on the mechanism and kinetics of Cl-initiated oxidation of ethyl acrylate. Struct Chem 2017. [DOI: 10.1007/s11224-017-0967-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Li X, Cao H, Han D, Zhang S, He M. The mechanism and kinetic studies for Cl-initiated oxidation of allyl acetate in troposphere. COMPUT THEOR CHEM 2016. [DOI: 10.1016/j.comptc.2016.04.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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