Kinetics and mechanism of CH3Br, CHF2Br, and C2HF4Br photolysis in the presence of dioxygen under the action of lambda=253.7 nm light | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

3332583

Reference Type

Journal Article

Title

Kinetics and mechanism of CH3Br, CHF2Br, and C2HF4Br photolysis in the presence of dioxygen under the action of lambda=253.7 nm light

Author(s)

Larin, IK; Belyakova, TI; Messineva, NA; Spasskii, AI; Trofimova, EM

Year

2014

Is Peer Reviewed?

Journal

Kinetics and Catalysis
ISSN: 0023-1584
EISSN: 1608-3210

Volume

Issue

Page Numbers

549-555

DOI

10.1134/S0023158414050085

Web of Science Id

WOS:000342423300003

Abstract

The photolysis of CH3Br, CHF2Br, and C2HF4Br mixed with oxygen under radiation emitted by a bactericidal mercury lamp (radiation intensity maximum at lambda = 253.7 nm) has been investigated. Oxygen was added in order to simulate natural conditions. A photolysis mechanism has been suggested, the corresponding model calculations have been carried out, and the calculated data have been compared with experimental data. The calculated absorption cross sections are in agreement with the literature, thus proving the validity of the mechanism suggested. The ratios between the rate constants of the reactions of the photolytically generated CH3, CHF2, and C2HF4 radicals with molecular bromine and oxygen have been determined.