Kinetic and mechanistic studies of the OH-initiated oxidation of dimethylsulfide at low temperature - A reevaluation of the rate coefficient and branching ratio

被引：43

作者：

Williams, MB ^{[1
]}

Campuzano-Jost, P ^{[1
]}

Bauer, D ^{[1
]}

Hynes, AJ ^{[1
]}

机构：

[1] Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Div Marine & Atmospher Chem, Miami, FL 33149 USA

来源：

CHEMICAL PHYSICS LETTERS | 2001年 / 344卷 / 1-2期

关键词：

D O I：

10.1016/S0009-2614(01)00764-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The pulsed laser photo lysis-pulsed laser induced fluorescence (PLP-PLIF) technique has been used to study the reactions of OH with DMS and DMS-d(6). The effective rate coefficient for the reaction of OH with DMS-d6 has been determined as a function Of O-2 partial pressure at 600 Torr total pressure in N-2/O-2 mixtures at 298 and 261 K and for both DMS and DMS-d(6) at 240 K. Currently recommended rates are based on an empirical fit to a two-channel mechanism. This work shows that at low temperatures the currently recommended expression underestimates both the effective rate coefficient for reaction together with the branching ratio between addition and abstraction. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：61 / 67

页数：7

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