1
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Garavagno MDLA, Hernández FJ, Jara-Toro RA, Pino GA. Understanding the active role of water in laboratory chamber studies of reactions of the OH radical with alcohols of atmospheric relevance. Phys Chem Chem Phys 2024; 26:12745-12752. [PMID: 38619305 DOI: 10.1039/d3cp05667h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2024]
Abstract
In this work, we studied the reactions of three cyclic aliphatic alcohols with OH at room temperature, atmospheric pressure and different humidities in a Teflon reaction chamber. It was determined that the lower the solubility of the alcohol in water, the larger the effect of the humidity on the acceleration of the reaction. This experimental evidence allows suggesting that the acceleration is due to the reaction of the co-adsorbed reactants at the air-water interface of a thin water film deposited on the Teflon walls of the reaction chamber, instead of between co-reactants dissolved in the water film or due to gas phase catalysis as previously suggested. Therefore, formation of thin water films on different surfaces could have some implications on the tropospheric chemistry of these alcohols in the tropical regions of the planet with high humidity.
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Affiliation(s)
- María de Los A Garavagno
- INFIQC: Instituto de Investigaciones en Físico-Química de Córdoba (CONICET - UNC), Haya de la Torre y Medina Allende, Pabellón Argentina, Ciudad Universitaria, Córdoba 5000, Argentina.
- Departamento de Fisicoquímica, Fac. de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre y Medina Allende, Pabellón Argentina, Ciudad Universitaria, Córdoba 5000, Argentina
- Centro Láser de Ciencias Moleculares, Universidad Nacional de Córdoba, Haya de la Torre y Medina Allende, Pabellón Argentina, Ciudad Universitaria, Córdoba 5000, Argentina
| | - Federico J Hernández
- INFIQC: Instituto de Investigaciones en Físico-Química de Córdoba (CONICET - UNC), Haya de la Torre y Medina Allende, Pabellón Argentina, Ciudad Universitaria, Córdoba 5000, Argentina.
- Departamento de Fisicoquímica, Fac. de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre y Medina Allende, Pabellón Argentina, Ciudad Universitaria, Córdoba 5000, Argentina
- Centro Láser de Ciencias Moleculares, Universidad Nacional de Córdoba, Haya de la Torre y Medina Allende, Pabellón Argentina, Ciudad Universitaria, Córdoba 5000, Argentina
| | - Rafael A Jara-Toro
- INFIQC: Instituto de Investigaciones en Físico-Química de Córdoba (CONICET - UNC), Haya de la Torre y Medina Allende, Pabellón Argentina, Ciudad Universitaria, Córdoba 5000, Argentina.
- Departamento de Fisicoquímica, Fac. de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre y Medina Allende, Pabellón Argentina, Ciudad Universitaria, Córdoba 5000, Argentina
- Centro Láser de Ciencias Moleculares, Universidad Nacional de Córdoba, Haya de la Torre y Medina Allende, Pabellón Argentina, Ciudad Universitaria, Córdoba 5000, Argentina
| | - Gustavo A Pino
- INFIQC: Instituto de Investigaciones en Físico-Química de Córdoba (CONICET - UNC), Haya de la Torre y Medina Allende, Pabellón Argentina, Ciudad Universitaria, Córdoba 5000, Argentina.
- Departamento de Fisicoquímica, Fac. de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre y Medina Allende, Pabellón Argentina, Ciudad Universitaria, Córdoba 5000, Argentina
- Centro Láser de Ciencias Moleculares, Universidad Nacional de Córdoba, Haya de la Torre y Medina Allende, Pabellón Argentina, Ciudad Universitaria, Córdoba 5000, Argentina
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2
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The influence of a single water molecule on the reaction of IO + HONO. Struct Chem 2022. [DOI: 10.1007/s11224-022-01972-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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3
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Dash MR, Akbar Ali M. Effect of a single water molecule on ˙CH 2OH + 3O 2 reaction under atmospheric and combustion conditions. Phys Chem Chem Phys 2021; 24:1510-1519. [PMID: 34935796 DOI: 10.1039/d1cp03911c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The hydroxymethyl (˙CH2OH) radical is an important intermediate species in both atmosphere and combustion reaction systems. The rate coefficients for ˙CH2OH + 3O2 and (˙CH2OH + 3O2 (+H2O)) reactions were calculated using the Rice-Ramsperger-Kassel-Marcus (RRKM)/master equation (ME) simulation and canonical variational transition state theory (CVT) between the temperature range of 200 to 1500 K based on the potential energy surface constructed using CCSD(T)//ωB97XD/6-311++G(3df,3pd). The results show that ˙CH2OH + 3O2 leads to the formation of CH2O and HO2 at temperatures below 800 K, and goes back to reactants at high temperature (>1000 K). When a water molecule is added to the reaction, the formation of CH2O and HO2 is favored at all temperatures. The calculated rate coefficient for the ˙CH2OH + 3O2 (2.8 × 10-11 cm3 molecule-1 s-1 at 298 K) is in good agreement with the previous experimental values (∼1 × 10-11 cm3 molecule-1 s-1 at 298 K). The rate coefficients for the water-assisted reaction (2.4 × 10-16 cm3 molecule-1 s-1 at 1000 K) is at least 3-4 orders of magnitude smaller than the water-free reaction (6.2 × 10-12 cm3 molecule-1 s-1 at 1000 K). This result is consistent with the similar types of reaction system. Our calculations also predict that the effect of a single water molecule favors the formation of CH2O in the combustion condition. However, the water-free reaction favors the formation of CH2O in the atmospheric condition. The current study helps to understand how a single water molecule changes the reaction mechanism and chemical kinetic behaviour under atmospheric and combustion conditions.
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Affiliation(s)
- Manas Ranjan Dash
- Department of Chemistry, National Institute of Technology, Raipur 492010, India
| | - Mohamad Akbar Ali
- Department of Chemistry, College of Science, King Faisal University, P.O. Box 380, Al Hufuf 31982, Al-Ahsa, Saudi Arabia.
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Neeman EM, González D, Blázquez S, Ballesteros B, Canosa A, Antiñolo M, Vereecken L, Albaladejo J, Jiménez E. The impact of water vapor on the OH reactivity toward CH 3CHO at ultra-low temperatures (21.7-135.0 K): Experiments and theory. J Chem Phys 2021; 155:034306. [PMID: 34293904 PMCID: PMC7611909 DOI: 10.1063/5.0054859] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The role of water vapor (H2O) and its hydrogen-bonded complexes in the gas-phase reactivity of organic compounds with hydroxyl (OH) radicals has been the subject of many recent studies. Contradictory effects have been reported at temperatures between 200 and 400 K. For the OH + acetaldehyde reaction, a slight catalytic effect of H2O was previously reported at temperatures between 60 and 118 K. In this work, we used Laval nozzle expansions to reinvestigate the impact of H2O on the OH-reactivity with acetaldehyde between 21.7 and 135.0 K. The results of this comprehensive study demonstrate that water, instead, slows down the reaction by factors of ∼3 (21.7 K) and ∼2 (36.2-89.5 K), and almost no effect of added H2O was observed at 135.0 K.
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Affiliation(s)
- E. M. Neeman
- Departamento de Química Física. Facultad de Ciencias y Tecnologías Químicas. Universidad de Castilla-La Mancha. Avda. Camilo José Cela 1B. 13071, Ciudad Real, Spain
| | - D. González
- Departamento de Química Física. Facultad de Ciencias y Tecnologías Químicas. Universidad de Castilla-La Mancha. Avda. Camilo José Cela 1B. 13071, Ciudad Real, Spain
| | - S. Blázquez
- Departamento de Química Física. Facultad de Ciencias y Tecnologías Químicas. Universidad de Castilla-La Mancha. Avda. Camilo José Cela 1B. 13071, Ciudad Real, Spain
| | - B. Ballesteros
- Departamento de Química Física. Facultad de Ciencias y Tecnologías Químicas. Universidad de Castilla-La Mancha. Avda. Camilo José Cela 1B. 13071, Ciudad Real, Spain
- Instituto de Investigación en Combustión y Contaminación Atmosférica. Universidad de Castilla-La Mancha. Camino de Moledores s/n. 13071, Ciudad Real, Spain
| | - A. Canosa
- CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, Université de Rennes, F-35000, Rennes, France
| | - M. Antiñolo
- Departamento de Química Física. Facultad de Ciencias y Tecnologías Químicas. Universidad de Castilla-La Mancha. Avda. Camilo José Cela 1B. 13071, Ciudad Real, Spain
- Instituto de Investigación en Combustión y Contaminación Atmosférica. Universidad de Castilla-La Mancha. Camino de Moledores s/n. 13071, Ciudad Real, Spain
| | - L. Vereecken
- Institute for energy and climate research, IEK-8: Troposphere. Forschungszentrum Jülich GmbH, Jülich, Germany
| | - J. Albaladejo
- Departamento de Química Física. Facultad de Ciencias y Tecnologías Químicas. Universidad de Castilla-La Mancha. Avda. Camilo José Cela 1B. 13071, Ciudad Real, Spain
- Instituto de Investigación en Combustión y Contaminación Atmosférica. Universidad de Castilla-La Mancha. Camino de Moledores s/n. 13071, Ciudad Real, Spain
| | - E. Jiménez
- Departamento de Química Física. Facultad de Ciencias y Tecnologías Químicas. Universidad de Castilla-La Mancha. Avda. Camilo José Cela 1B. 13071, Ciudad Real, Spain
- Instituto de Investigación en Combustión y Contaminación Atmosférica. Universidad de Castilla-La Mancha. Camino de Moledores s/n. 13071, Ciudad Real, Spain
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5
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Ali MA, Balaganesh M, Al-Odail FA, Lin KC. Effect of ammonia and water molecule on OH + CH 3OH reaction under tropospheric condition. Sci Rep 2021; 11:12185. [PMID: 34108500 PMCID: PMC8190139 DOI: 10.1038/s41598-021-90640-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 05/05/2021] [Indexed: 11/21/2022] Open
Abstract
The rate coefficients for OH + CH3OH and OH + CH3OH (+ X) (X = NH3, H2O) reactions were calculated using microcanonical, and canonical variational transition state theory (CVT) between 200 and 400 K based on potential energy surface constructed using CCSD(T)//M06-2X/6-311++G(3df,3pd). The results show that OH + CH3OH is dominated by the hydrogen atoms abstraction from CH3 position in both free and ammonia/water catalyzed ones. This result is in consistent with previous experimental and theoretical studies. The calculated rate coefficient for the OH + CH3OH (8.8 × 10-13 cm3 molecule-1 s-1), for OH + CH3OH (+ NH3) [1.9 × 10-21 cm3 molecule-1 s-1] and for OH + CH3OH (+ H2O) [8.1 × 10-16 cm3 molecule-1 s-1] at 300 K. The rate coefficient is at least 8 order magnitude [for OH + CH3OH(+ NH3) reaction] and 3 orders magnitude [OH + CH3OH (+ H2O)] are smaller than free OH + CH3OH reaction. Our calculations predict that the catalytic effect of single ammonia and water molecule on OH + CH3OH reaction has no effect under tropospheric conditions because the dominated ammonia and water-assisted reaction depends on ammonia and water concentration, respectively. As a result, the total effective reaction rate coefficients are smaller. The current study provides a comprehensive example of how basic and neutral catalysts effect the most important atmospheric prototype alcohol reactions.
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Affiliation(s)
- Mohamad Akbar Ali
- Department of Chemistry, College of Science, King Faisal University, PO Box 380, Al Hufuf, 31982, Al-Ahsa, Saudi Arabia.
| | - M Balaganesh
- Department of Chemistry, National Taiwan University, Taipei, Taiwan
| | - Faisal A Al-Odail
- Department of Chemistry, College of Science, King Faisal University, PO Box 380, Al Hufuf, 31982, Al-Ahsa, Saudi Arabia
| | - K C Lin
- Department of Chemistry, National Taiwan University, Taipei, Taiwan
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6
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Jara-Toro RA, Barrera JA, Aranguren-Abrate JP, Taccone RA, Pino GA. Rate Coefficient and Mechanism of the OH-Initiated Degradation of 1-Chlorobutane: Atmospheric Implications. J Phys Chem A 2020; 124:229-239. [PMID: 31825215 DOI: 10.1021/acs.jpca.9b10426] [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
In this work, we investigate the degradation process of 1-chlorobutane, initiated by OH radicals, under atmospheric conditions (air pressure of 750 Torr and 296 K) from both experimental and theoretical approaches. In the first one, a relative kinetic method was used to obtain the rate coefficient for this reaction, while the products were identified for the first time (1-chloro-2-butanone, 1-chloro-2-butanol, 4-chloro-2-butanone, 3-hydroxy-butanaldehyde, and 3-chloro-2-butanol) using mass spectrometry, allowing suggesting a reaction mechanism. The theoretical calculations, for the reactive process, were computed using the BHandHLYP/6-311++G(d,p) level of theory, and the energies for all of the stationary points were refined at the CCSD(T) level. Five conformers for 1-chlorobutane and 33 reactive channels with OH radicals were found, which were considered to calculate the thermal rate coefficient (as the sum of the site-specific rate coefficients using canonical transition state theory). The theoretical rate coefficient (1.8 × 10-12 cm3 molecule-1 s-1) is in good agreement with the experimental value (2.22 ± 0.50) × 10-12 cm3 molecule-1 s-1 determined in this work. Finally, environmental impact indexes were calculated and a discussion on the atmospheric implications due to the emissions of this compound into the troposphere was given.
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Affiliation(s)
- Rafael A Jara-Toro
- Departamento de Fisicoquímica, Facultad de Ciencias Químicas-Universidad Nacional de Córdoba , Ciudad Universitaria , Haya de la Torre y Medina Allende , X5000HUA Córdoba , Argentina.,Centro Láser de Ciencias Moleculares-Universidad Nacional de Córdoba , Ciudad Universitaria , Haya de la Torre s/n, Pabellón Argentina , X5000HUA Córdoba , Argentina
| | - Javier A Barrera
- Departamento de Fisicoquímica, Facultad de Ciencias Químicas-Universidad Nacional de Córdoba , Ciudad Universitaria , Haya de la Torre y Medina Allende , X5000HUA Córdoba , Argentina.,Centro Láser de Ciencias Moleculares-Universidad Nacional de Córdoba , Ciudad Universitaria , Haya de la Torre s/n, Pabellón Argentina , X5000HUA Córdoba , Argentina
| | - Juan P Aranguren-Abrate
- Departamento de Fisicoquímica, Facultad de Ciencias Químicas-Universidad Nacional de Córdoba , Ciudad Universitaria , Haya de la Torre y Medina Allende , X5000HUA Córdoba , Argentina.,Centro Láser de Ciencias Moleculares-Universidad Nacional de Córdoba , Ciudad Universitaria , Haya de la Torre s/n, Pabellón Argentina , X5000HUA Córdoba , Argentina
| | - Raúl A Taccone
- Departamento de Fisicoquímica, Facultad de Ciencias Químicas-Universidad Nacional de Córdoba , Ciudad Universitaria , Haya de la Torre y Medina Allende , X5000HUA Córdoba , Argentina.,Centro Láser de Ciencias Moleculares-Universidad Nacional de Córdoba , Ciudad Universitaria , Haya de la Torre s/n, Pabellón Argentina , X5000HUA Córdoba , Argentina
| | - Gustavo A Pino
- Departamento de Fisicoquímica, Facultad de Ciencias Químicas-Universidad Nacional de Córdoba , Ciudad Universitaria , Haya de la Torre y Medina Allende , X5000HUA Córdoba , Argentina.,Centro Láser de Ciencias Moleculares-Universidad Nacional de Córdoba , Ciudad Universitaria , Haya de la Torre s/n, Pabellón Argentina , X5000HUA Córdoba , Argentina
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7
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Weber I, Bouzidi H, Krumm B, Schoemaecker C, Tomas A, Fittschen C. Water does not catalyze the reaction of OH radicals with ethanol. Phys Chem Chem Phys 2020; 22:7165-7168. [DOI: 10.1039/d0cp00467g] [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
H2O2 as an OH precursor in simulation chambers induces an increase in the apparent rate constant with an increase in the humidity.
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Affiliation(s)
- Isabelle Weber
- Univ. Lille
- CNRS
- UMR 8522 – PC2A – Physicochimie des Processus de Combustion et de l’Atmosphère
- F-59000 Lille
- France
| | - Hichem Bouzidi
- IMT Lille Douai
- Univ. Lille
- SAGE – Sciences de l’Atmosphère et Génie de l’Environnement
- 59500 Lille
- France
| | - Bianca Krumm
- Univ. Lille
- CNRS
- UMR 8522 – PC2A – Physicochimie des Processus de Combustion et de l’Atmosphère
- F-59000 Lille
- France
| | - Coralie Schoemaecker
- Univ. Lille
- CNRS
- UMR 8522 – PC2A – Physicochimie des Processus de Combustion et de l’Atmosphère
- F-59000 Lille
- France
| | - Alexandre Tomas
- IMT Lille Douai
- Univ. Lille
- SAGE – Sciences de l’Atmosphère et Génie de l’Environnement
- 59500 Lille
- France
| | - Christa Fittschen
- Univ. Lille
- CNRS
- UMR 8522 – PC2A – Physicochimie des Processus de Combustion et de l’Atmosphère
- F-59000 Lille
- France
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8
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Yuan Li, Li K, Song X, Sun H, Ning P, Sun X. Mechanism of Catalytic Effect of Water Clusters on the Oxidation of Phosphine Gas. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2019. [DOI: 10.1134/s0036024419120367] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Tang S, Du L. A single water molecule accelerating the atmospheric reaction of HONO with ClO. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:27842-27853. [PMID: 31342353 DOI: 10.1007/s11356-019-05999-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 07/16/2019] [Indexed: 06/10/2023]
Abstract
The role of a single water molecule on the atmospheric reaction of HONO + ClO is systematically investigated employing quantum chemical calculation combined with harmonic transition state theory. Two reaction pathways, cis-HONO + ClO and trans-HONO + ClO, are identified for the naked reaction, which depends on the configurations of HONO. When adding a single water molecule to this reaction, the rate constants of cis-HONO + ClO and trans-HONO + ClO pathways are 7.97 × 10-21 and 2.29 × 10-17 cm3 molecule-1 s-1, respectively, larger than the corresponding naked reaction. To further understand the role of water on the HONO + ClO reaction, it is necessary to calculate the effective rate constant by considering the concentration of water. It shows that the effective rate constants of water-assisted cis-HONO + ClO pathway are much smaller than those of the naked reaction, whereas the presence of water accelerates the trans-HONO + ClO at room temperature. This study demonstrates that water has a positive role in the pathway of trans-HONO + ClO by modifying the stabilities of reactant complexes and transition states through the hydrogen bond formation, which contributes to the sink of atmospheric HONO. In addition, the kinetic branching ratio indicates that the favorable reaction is the trans-HONO + ClO instead of the cis-HONO + ClO pathway, in contrast to the naked reaction. These results reveal the importance of water in the evaluation of the fate of active species in the atmosphere. Graphical Abstract.
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Affiliation(s)
- Shanshan Tang
- Environment Research Institute, Shandong University, Binhai Road 72, Qingdao, 266237, China
| | - Lin Du
- Environment Research Institute, Shandong University, Binhai Road 72, Qingdao, 266237, China.
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Chao W, Jr‐Min Lin J, Takahashi K, Tomas A, Yu L, Kajii Y, Batut S, Schoemaecker C, Fittschen C. Water Vapor Does Not Catalyze the Reaction between Methanol and OH Radicals. Angew Chem Int Ed Engl 2019; 58:5013-5017. [DOI: 10.1002/anie.201900711] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Wen Chao
- Institute of Atomic and Molecular SciencesAcademia Sinica Taipei 10617 Taiwan
| | - Jim Jr‐Min Lin
- Institute of Atomic and Molecular SciencesAcademia Sinica Taipei 10617 Taiwan
| | - Kaito Takahashi
- Institute of Atomic and Molecular SciencesAcademia Sinica Taipei 10617 Taiwan
| | - Alexandre Tomas
- Sciences de l'Atmosphère et Génie de l'Environnement SAGEIMT Lille Douai 941 Rue Charles Bourseul 59508 Douai France
| | - Lu Yu
- Atmospheric ChemistryDepartment of Natural SourcesUniversity of Kyoto Kyoto 606-8501 Japan
| | - Yoshizumi Kajii
- Atmospheric ChemistryDepartment of Natural SourcesUniversity of Kyoto Kyoto 606-8501 Japan
| | - Sébastien Batut
- Physical Chemistry of Combustion and Atmospheric ProcessesUniversity Lille/ CNRS UMR 8522 Cité Scientifique, Bât. C11 59655 Villeneuve d'Ascq France
| | - Coralie Schoemaecker
- Physical Chemistry of Combustion and Atmospheric ProcessesUniversity Lille/ CNRS UMR 8522 Cité Scientifique, Bât. C11 59655 Villeneuve d'Ascq France
| | - Christa Fittschen
- Physical Chemistry of Combustion and Atmospheric ProcessesUniversity Lille/ CNRS UMR 8522 Cité Scientifique, Bât. C11 59655 Villeneuve d'Ascq France
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11
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Xu L, Tsona NT, Tang S, Li J, Du L. Role of (H 2O) n ( n = 1-2) in the Gas-Phase Reaction of Ethanol with Hydroxyl Radical: Mechanism, Kinetics, and Products. ACS OMEGA 2019; 4:5805-5817. [PMID: 31459732 PMCID: PMC6648320 DOI: 10.1021/acsomega.9b00145] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 03/14/2019] [Indexed: 06/10/2023]
Abstract
The effect of water on the hydrogen abstraction mechanism and product branching ratio of CH3CH2OH + •OH reaction has been investigated at the CCSD(T)/aug-cc-pVTZ//BH&HLYP/aug-cc-pVTZ level of theory, coupled with the reaction kinetics calculations, implying the harmonic transition-state theory. Depending on the hydrogen sites in CH3CH2OH, the bared reaction proceeds through three elementary paths, producing CH2CH2OH, CH3CH2O, and CH3CHOH and releasing a water molecule. Thermodynamic and kinetic results indicate that the formation of CH3CHOH is favored over the temperature range of 216.7-425.0 K. With the inclusion of water, the reaction becomes quite complex, yielding five paths initiated by three channels. The products do not change compared with the bared reaction, but the preference for forming CH3CHOH drops by up to 2%. In the absence of water, the room temperature rate coefficients for the formation of CH2CH2OH, CH3CH2O, and CH3CHOH are computed to be 5.2 × 10-13, 8.6 × 10-14, and 9.0 × 10-11 cm3 molecule-1 s-1, respectively. The effective rate coefficients of corresponding monohydrated and dihydrated reactions are 3-5 and 6-8 orders of magnitude lower than those of the unhydrated reaction, indicating that water has a decelerating effect on the studied reaction. Overall, the characterized effects of water on the thermodynamics, kinetics, and products of the CH3CH2OH + •OH reaction will facilitate the understanding of the fate of ethanol and secondary pollutants derived from it.
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Affiliation(s)
- Li Xu
- Environment
Research Institute and School of Life Science, Shandong University, Qingdao 266237, China
| | - Narcisse T. Tsona
- Environment
Research Institute and School of Life Science, Shandong University, Qingdao 266237, China
| | - Shanshan Tang
- Environment
Research Institute and School of Life Science, Shandong University, Qingdao 266237, China
| | - Junyao Li
- Environment
Research Institute and School of Life Science, Shandong University, Qingdao 266237, China
| | - Lin Du
- Environment
Research Institute and School of Life Science, Shandong University, Qingdao 266237, China
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12
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Chao W, Jr‐Min Lin J, Takahashi K, Tomas A, Yu L, Kajii Y, Batut S, Schoemaecker C, Fittschen C. Water Vapor Does Not Catalyze the Reaction between Methanol and OH Radicals. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201900711] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Wen Chao
- Institute of Atomic and Molecular SciencesAcademia Sinica Taipei 10617 Taiwan
| | - Jim Jr‐Min Lin
- Institute of Atomic and Molecular SciencesAcademia Sinica Taipei 10617 Taiwan
| | - Kaito Takahashi
- Institute of Atomic and Molecular SciencesAcademia Sinica Taipei 10617 Taiwan
| | - Alexandre Tomas
- Sciences de l'Atmosphère et Génie de l'Environnement SAGEIMT Lille Douai 941 Rue Charles Bourseul 59508 Douai France
| | - Lu Yu
- Atmospheric ChemistryDepartment of Natural SourcesUniversity of Kyoto Kyoto 606-8501 Japan
| | - Yoshizumi Kajii
- Atmospheric ChemistryDepartment of Natural SourcesUniversity of Kyoto Kyoto 606-8501 Japan
| | - Sébastien Batut
- Physical Chemistry of Combustion and Atmospheric ProcessesUniversity Lille/ CNRS UMR 8522 Cité Scientifique, Bât. C11 59655 Villeneuve d'Ascq France
| | - Coralie Schoemaecker
- Physical Chemistry of Combustion and Atmospheric ProcessesUniversity Lille/ CNRS UMR 8522 Cité Scientifique, Bât. C11 59655 Villeneuve d'Ascq France
| | - Christa Fittschen
- Physical Chemistry of Combustion and Atmospheric ProcessesUniversity Lille/ CNRS UMR 8522 Cité Scientifique, Bât. C11 59655 Villeneuve d'Ascq France
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