Title :

Water Vapor Does Not Catalyze the Reaction between Methanol and OH Radicals

Author(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]

Journal title :

Angewandte Chemie International Edition

Abbreviated title :

Angew. Chem. Int. Ed.

Volume number :

58

Pages :

5013-5017

Publisher :

Wiley

Publication date :

2019-04-01

English keyword(s) :

alcohols
atmospheric chemistry
fluorescence
radical reactions
reaction mechanisms

HAL domain(s) :

Chimie/Chimie théorique et/ou physique
Physique [physics]/Physique [physics]/Chimie-Physique [physics.chem-ph]

English abstract : [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. ...
Show more >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.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Non spécifiée

Administrative institution(s) :

Université de Lille
CNRS

Collections :

• Physicochimie des Processus de Combustion et de l'Atmosphère (PC2A) - UMR 8522

Research team(s) :

PhysicoChimie de l'Atmosphère (PCA)

Submission date :

2020-10-07T13:25:07Z
2020-10-15T11:13:19Z