Absolute Absorption Cross-Section of the ...
Type de document :
Article dans une revue scientifique: Article original
DOI :
URL permanente :
Titre :
Absolute Absorption Cross-Section of the Ã←X˜ Electronic Transition of the Ethyl Peroxy Radical and Rate Constant of Its Cross Reaction with HO2
Auteur(s) :
Zhang, Cuihong [Auteur]
Physicochimie des Processus de Combustion et de l'Atmosphère (PC2A) - UMR 8522
Shamas, Mirna [Auteur]
Physicochimie des Processus de Combustion et de l'Atmosphère (PC2A) - UMR 8522
Physicochimie des Processus de Combustion et de l'Atmosphère (PC2A) - UMR 8522
Assali, Mohamed [Auteur]
Physicochimie des Processus de Combustion et de l'Atmosphère (PC2A) - UMR 8522
Physicochimie des Processus de Combustion et de l'Atmosphère (PC2A) - UMR 8522
Tang, Xiaofeng [Auteur]
Anhui Institute of Optics and Fine Mechanics
University of Science and Technology of China [Hefei] [USTC]
Zhang, Weijun [Auteur]
Anhui Institute of Optics and Fine Mechanics
University of Science and Technology of China [Hefei] [USTC]
Pillier, Laure [Auteur]
Physicochimie des Processus de Combustion et de l'Atmosphère (PC2A) - UMR 8522
Schoemaecker, Coralie [Auteur]
Physicochimie des Processus de Combustion et de l'Atmosphère (PC2A) - UMR 8522
Fittschen, Christa [Auteur]
Physicochimie des Processus de Combustion et de l'Atmosphère (PC2A) - UMR 8522
Physicochimie des Processus de Combustion et de l'Atmosphère (PC2A) - UMR 8522
Shamas, Mirna [Auteur]
Physicochimie des Processus de Combustion et de l'Atmosphère (PC2A) - UMR 8522
Physicochimie des Processus de Combustion et de l'Atmosphère (PC2A) - UMR 8522
Assali, Mohamed [Auteur]
Physicochimie des Processus de Combustion et de l'Atmosphère (PC2A) - UMR 8522
Physicochimie des Processus de Combustion et de l'Atmosphère (PC2A) - UMR 8522
Tang, Xiaofeng [Auteur]
Anhui Institute of Optics and Fine Mechanics
University of Science and Technology of China [Hefei] [USTC]
Zhang, Weijun [Auteur]
Anhui Institute of Optics and Fine Mechanics
University of Science and Technology of China [Hefei] [USTC]
Pillier, Laure [Auteur]
Physicochimie des Processus de Combustion et de l'Atmosphère (PC2A) - UMR 8522
Schoemaecker, Coralie [Auteur]
Physicochimie des Processus de Combustion et de l'Atmosphère (PC2A) - UMR 8522
Fittschen, Christa [Auteur]
Physicochimie des Processus de Combustion et de l'Atmosphère (PC2A) - UMR 8522
Titre de la revue :
Photonics
Nom court de la revue :
Photonics
Numéro :
88
Pagination :
296
Éditeur :
MDPI AG
Date de publication :
2021-07-24
ISSN :
2304-6732
Mot(s)-clé(s) en anglais :
peroxy radicals
near-infrared spectroscopy
Ã←X˜electronic transitio
cavity ring down spectroscopy
near-infrared spectroscopy
Ã←X˜electronic transitio
cavity ring down spectroscopy
Discipline(s) HAL :
Chimie/Chimie théorique et/ou physique
Physique [physics]
Physique [physics]/Physique [physics]/Chimie-Physique [physics.chem-ph]
Physique [physics]
Physique [physics]/Physique [physics]/Chimie-Physique [physics.chem-ph]
Résumé en anglais : [en]
The absolute absorption cross-section of the ethyl peroxy radical C2H5O2 in the Ã←X˜ electronic transition with the peak wavelength at 7596 cm−1 has been determined by the method of dual wavelengths time resolved continuous ...
Lire la suite >The absolute absorption cross-section of the ethyl peroxy radical C2H5O2 in the Ã←X˜ electronic transition with the peak wavelength at 7596 cm−1 has been determined by the method of dual wavelengths time resolved continuous wave cavity ring down spectroscopy. C2H5O2 radicals were generated from pulsed 351 nm photolysis of C2H6/Cl2 mixture in presence of 100 Torr O2 at T = 295 K. C2H5O2 radicals were detected on one of the CRDS paths. Two methods have been applied for the determination of the C2H5O2 absorption cross-section: (i) based on Cl-atoms being converted alternatively to either C2H5O2 by adding C2H6 or to hydro peroxy radicals, HO2, by adding CH3OH to the mixture, whereby HO2 was reliably quantified on the second CRDS path in the 2ν1 vibrational overtone at 6638.2 cm−1 (ii) based on the reaction of C2H5O2 with HO2, measured under either excess HO2 or under excess C2H5O2 concentration. Both methods lead to the same peak absorption cross-section for C2H5O2 at 7596 cm−1 of σ = (1.0 ± 0.2) × 10−20 cm2. The rate constant for the cross reaction between of C2H5O2 and HO2 has been measured to be (6.2 ± 1.5) × 10−12 cm3 molecule−1 s−1.Lire moins >
Lire la suite >The absolute absorption cross-section of the ethyl peroxy radical C2H5O2 in the Ã←X˜ electronic transition with the peak wavelength at 7596 cm−1 has been determined by the method of dual wavelengths time resolved continuous wave cavity ring down spectroscopy. C2H5O2 radicals were generated from pulsed 351 nm photolysis of C2H6/Cl2 mixture in presence of 100 Torr O2 at T = 295 K. C2H5O2 radicals were detected on one of the CRDS paths. Two methods have been applied for the determination of the C2H5O2 absorption cross-section: (i) based on Cl-atoms being converted alternatively to either C2H5O2 by adding C2H6 or to hydro peroxy radicals, HO2, by adding CH3OH to the mixture, whereby HO2 was reliably quantified on the second CRDS path in the 2ν1 vibrational overtone at 6638.2 cm−1 (ii) based on the reaction of C2H5O2 with HO2, measured under either excess HO2 or under excess C2H5O2 concentration. Both methods lead to the same peak absorption cross-section for C2H5O2 at 7596 cm−1 of σ = (1.0 ± 0.2) × 10−20 cm2. The rate constant for the cross reaction between of C2H5O2 and HO2 has been measured to be (6.2 ± 1.5) × 10−12 cm3 molecule−1 s−1.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Projet ANR :
Établissement(s) :
Université de Lille
CNRS
CNRS
Équipe(s) de recherche :
PhysicoChimie de l'Atmosphère (PCA)
Date de dépôt :
2021-08-24T12:42:09Z
2021-08-27T13:23:34Z
2021-08-27T13:23:34Z
Fichiers
- Ethylperoxy cross section_final.pdf
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