Water Vapor Does Not Catalyze the Reaction ...
Type de document :
Article dans une revue scientifique: Article original
DOI :
URL permanente :
Titre :
Water Vapor Does Not Catalyze the Reaction between Methanol and OH Radicals
Auteur(s) :
Chao, Wen [Auteur]
Academia Sinica
Jr‐Min Lin, Jim [Auteur]
Academia Sinica
Takahashi, Kaito [Auteur]
Academia Sinica
Tomas, Alexandre [Auteur]
Ecole nationale supérieure Mines-Télécom Lille Douai [IMT Lille Douai]
Yu, Lu [Auteur]
Kyoto University
Kajii, Yoshizumi [Auteur]
Kyoto University
BATUT, Sebastien [Auteur]
Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]
Schoemaecker, Coralie [Auteur]
Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]
Fittschen, Christa [Auteur]
Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]
Academia Sinica
Jr‐Min Lin, Jim [Auteur]
Academia Sinica
Takahashi, Kaito [Auteur]
Academia Sinica
Tomas, Alexandre [Auteur]
Ecole nationale supérieure Mines-Télécom Lille Douai [IMT Lille Douai]
Yu, Lu [Auteur]
Kyoto University
Kajii, Yoshizumi [Auteur]
Kyoto University
BATUT, Sebastien [Auteur]
Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]
Schoemaecker, Coralie [Auteur]

Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]
Fittschen, Christa [Auteur]

Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]
Titre de la revue :
Angewandte Chemie International Edition
Nom court de la revue :
Angew. Chem. Int. Ed.
Numéro :
58
Pagination :
5013-5017
Éditeur :
Wiley
Date de publication :
2019-04-01
Mot(s)-clé(s) en anglais :
alcohols
atmospheric chemistry
fluorescence
radical reactions
reaction mechanisms
atmospheric chemistry
fluorescence
radical reactions
reaction mechanisms
Discipline(s) HAL :
Chimie/Chimie théorique et/ou physique
Physique [physics]/Physique [physics]/Chimie-Physique [physics.chem-ph]
Physique [physics]/Physique [physics]/Chimie-Physique [physics.chem-ph]
Résumé en anglais : [en]
Recent works[Jara-Toro et al., Angew. Chem.Int. Ed. 2017, 56, 2166and PCCP2018, 20, 27885]suggestthat the rate coefficient of OHreactionswith alcohols would increase by up to2 times from dry to highhumidity. ...
Lire la suite >Recent works[Jara-Toro et al., Angew. Chem.Int. Ed. 2017, 56, 2166and PCCP2018, 20, 27885]suggestthat the rate coefficient of OHreactionswith alcohols would increase by up to2 times from dry to highhumidity. This finding would have an impact on the budget of alcoholsin the atmosphere and that it mayexplain differences in measured and modeledmethanol concentrations. Theresultswerebased ona relative technique carried out in a small Teflon bag, which might suffer from wallreactions. Wehave re-investigated thiseffect usinga direct fluorescence probe of OH radicals, and no catalytic effect of H2O could be found. Experiments in a Teflon bag were also carriedout, but we were not able to reproduce the results of Jara-Toroet al.Furthertheoretical calculations show that the water-mediated reactions have negligibleratescompared to the bare reactionand thateven though water molecules can lower the barriers of reactions, it cannot make up for theentropycost.Lire moins >
Lire la suite >Recent works[Jara-Toro et al., Angew. Chem.Int. Ed. 2017, 56, 2166and PCCP2018, 20, 27885]suggestthat the rate coefficient of OHreactionswith alcohols would increase by up to2 times from dry to highhumidity. This finding would have an impact on the budget of alcoholsin the atmosphere and that it mayexplain differences in measured and modeledmethanol concentrations. Theresultswerebased ona relative technique carried out in a small Teflon bag, which might suffer from wallreactions. Wehave re-investigated thiseffect usinga direct fluorescence probe of OH radicals, and no catalytic effect of H2O could be found. Experiments in a Teflon bag were also carriedout, but we were not able to reproduce the results of Jara-Toroet al.Furthertheoretical calculations show that the water-mediated reactions have negligibleratescompared to the bare reactionand thateven though water molecules can lower the barriers of reactions, it cannot make up for theentropycost.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Non spécifiée
Établissement(s) :
Université de Lille
CNRS
CNRS
Équipe(s) de recherche :
PhysicoChimie de l'Atmosphère (PCA)
Date de dépôt :
2020-10-07T13:25:07Z
2020-10-15T11:13:19Z
2020-10-15T11:13:19Z
Fichiers
- Revised submitted.pdf
- Version finale acceptée pour publication (postprint)
- Accès restreint
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