A kinetic study of the reaction of Cl with a series of linear and ramified ketones as a function of temperature
A kinetic study of the reaction of Cl with a series of linear and ramified ketones as a function of temperature
复制标题
Cl 与一系列直链和支链酮反应随温度变化的动力学研究
DOI：
--
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
J. Albaladejo
中科院分区：
文献类型：
--
作者：
C. Cuevas;A. Notario;E. Martínez;J. Albaladejo
首次研究了 Cl 原子与 2,3-丁二酮 (k1)、2-丁酮 (k2)、2-戊酮 (k3)、2-己酮 (k4)、3-甲基-2-丁酮 (k5)、4-甲基-2-戊酮 (k6) 和 5-甲基-2-己酮 (k7) 的反应随温度的变化 (266–380 K)，压力范围为 20–200 Torr，使用脉冲激光光解共振荧光 (PLP-RF)。提出了七个反应的阿累尼乌斯表达式。讨论了所研究反应的温度依赖性； Cl原子与2,3-丁二酮的反应表现出正温度依赖性，而与2-戊酮、2-己酮、4-甲基-2-戊酮和5-甲基-2-己酮的相应反应表现出负温度依赖性，而与2-丁酮和3-甲基-2-丁酮的反应分别仅表现出轻微的正温度依赖性和负温度依赖性。最后，讨论了结果和大气影响，并与 OH 自由基的反应性进行了比较。
The reactions of Cl atoms with 2,3-butadione (k1), 2-butanone (k2), 2-pentanone (k3), 2-hexanone (k4), 3-methyl-2-butanone (k5), 4-methyl-2-pentanone (k6) and 5-methyl-2-hexanone (k7), were investigated for the first time as a function of temperature (266–380 K), over the pressure range 20–200 Torr, using pulsed laser photolysis-resonance fluorescence (PLP-RF). The Arrhenius expressions for the seven reactions are proposed. The temperature dependence of the studied reactions is discussed; the reaction of Cl atoms with 2,3-butadione exhibits a positive temperature dependence whereas the corresponding reactions with 2-pentanone, 2-hexanone, 4-methyl-2-pentanone and 5-methyl-2-hexanone exhibit a negative temperature dependence and those with 2-butanone and 3-methyl-2-butanone shows only a slightly positive and a negative temperature dependence, respectively. Finally, the results and atmospheric implications are discussed and compared with the reactivity towards the OH radical.