Rate coefficients for the reaction of C2H with O2 at 90 K and 120 K using a pulsed Laval nozzle apparatus

被引：28

作者：

Lee, S

Leone, SR ^{[1
]}

机构：

[1] Natl Inst Stand & Technol, Joint Inst Lab Astrophys, Quantum Phys Div, Boulder, CO 80309 USA

[2] Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA

来源：

CHEMICAL PHYSICS LETTERS | 2000年 / 329卷 / 5-6期

基金：

美国国家航空航天局;

关键词：

D O I：

10.1016/S0009-2614(00)01022-8

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：

Absolute rate coefficients for the reaction of C2H with O-2 are measured at 90 K and 120 K by using a pulsed Laval nozzle apparatus with laser ionization, time-of-flight mass spectrometry (TOF-MS). The C2H radicals are generated by laser photolysis of C2H2 at 193 nm, and the products of the reaction with O-2 and C2H2, HCCO and C4H2, respectively, are directly detected by laser ionization at 118 nm. Rate coefficients of (9.0+/-2.0) x 10(-11) and (5.0 +/- 1.5) x 10(-11) cm(3) molecule(-1) s(-1) are obtained at 90 K and 120 K for the C2H + O-2 reaction, respectively, by detecting the rise of the product HCCO. (C) 2000 Published by Elsevier Science B.V.

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页码：443 / 449

页数：7

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