Xing Jia-Hua, Miyoshi Akira
Department of Chemical System Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
J Phys Chem A. 2005 May 12;109(18):4095-101. doi: 10.1021/jp050609s.
The rate constants for the gas-phase reactions of isopropyl- and tert-butylperoxy radicals with nitric oxide (NO) have been studied at 298 +/- 2 K and a total pressure of 3-4 Torr (He buffer) using a laser flash photolysis technique coupled with a time-resolved negative-ionization mass spectrometry. The alkyl peroxy radicals were generated by the reaction of alkyl radicals with excess O(2), where alkyl radicals were prepared by laser photolysis of several precursor molecules. The rate constants were determined to be k(i-C(3)H(7)O(2) + NO) = (8.0 +/- 1.5) x 10(-12) and k(t-C(4)H(9)O(2) + NO) = (8.6 +/- 1.4) x 10(-12) cm(3) molecule(-1) s(-1). The results in combination with our previous studies are discussed in terms of the systematic reactivity of alkyl peroxy radicals toward NO.
利用激光闪光光解技术结合时间分辨负离子化质谱，在298±2 K和3 - 4 Torr（氦缓冲气）的总压力下，研究了异丙基和叔丁基过氧自由基与一氧化氮（NO）的气相反应速率常数。烷基过氧自由基通过烷基自由基与过量O₂的反应生成，其中烷基自由基由几种前体分子的激光光解制备。确定反应速率常数为k(i-C₃H₇O₂ + NO) = (8.0±1.5)×10⁻¹²和k(t-C₄H₉O₂ + NO) = (8.6±1.4)×10⁻¹² cm³·分子⁻¹·s⁻¹。结合我们之前的研究结果，从烷基过氧自由基对NO的系统反应活性方面进行了讨论。
