期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 7, 期 8, 页码 1657-1663出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b502844b
关键词
-
Laser. ash photolysis coupled to resonance-fluorescence detection of I atoms was used to measure the rate coefficients for the reactions: I + O-3 -> IO + O-2 (R1), O + I-2 -> IO + I (R6) and I + NO2 + M -> INO2 + M (R7). All experiments were conducted under pseudo first-order conditions, and the accuracy of the results was enhanced by online determination of reagent concentrations by optical absorption. Bimolecular rate coefficients for reactions (R1) and (R6) were determined to be k(1) = (1.28 +/- 0.06) x 10(-12) and k(6) = (1.2 +/- 0.1) x 10(-10) cm(3) molecule(-1) s(-1) at 298 +/- 2 K, independent of pressure. Rate coefficients for the termolecular reaction (R7), also at 298 +/- 2 K, were found to be in the falloff region between 3rd and 2nd order behaviour and, when combined with other datasets obtained at higher and lower pressures, were adequately described by a simplified Troe function with the parameters: k(7,0)(He, 330 K) = 1.48 x 10(-31) cm(6) molecule(-2) s(-1), FC(He) = 0.43, and k(7,infinity) = 1.1 x 10(-10) cm(3) molecule(-1) s(-1) for He as bath gas. In N-2 (or air) the following parameters were obtained k(7,0)(N-2, 300 K) = 3.2 x 10(-31) cm(6) molecule(-2) s(-1), F-C(N-2) = 0.48, with k(7)infinity, set to 1.1 x 10(-10) cm(3) molecule(-1) s(-1) as obtained from analysis of the falloff curve obtained in He.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据