Direct investigations of reactions of 1-butoxy and 1-pentoxy radicals using laser pulse initiated oxidation: reaction with O2 and isomerisation at 293 K and 50 mbar
作者:H. Hein、A. Hoffmann、R. Zellner
DOI:10.1039/a903301g
日期:——
The reactions of 1-butoxy and 1-pentoxy radicals were studied using time-resolved and simultaneous measurement of NO2 and OH concentrations in laser pulse initiated oxidation studies followed by numerical simulations of the concentration profiles. The alkoxy radicals were produced selectively by the excimer-laser photolysis of 1-butyl bromide and 1-pentyl bromide at 248 nm and subsequent reaction of the 1-alkyl radicals with O2 and NO. Whereas NO2 was detected by cw-LIF, OH was monitored by laser long-path absorption at 308 nm. All experiments were performed at 293±3 K and a total pressure of 50 mbar. The reactions with O2 and the isomerisations via a 1,5-H-shift, viz.,
在激光脉冲引发氧化研究中,通过时间分辨和同步测量NO2和OH浓度,并对浓度分布进行数值模拟,研究了1-丁氧基和1-戊氧基自由基的反应。通过248 nm的准分子激光光解1-溴丁烷和1-溴戊烷,以及随后1-烷基自由基与O2和NO的反应,选择性产生烷氧基自由基。通过cw-LIF检测NO2,通过308 nm的激光长程吸收监测OH。所有实验均在293±3 K和50 mbar的总压力下进行。与O2的反应和通过1,5-H-shift的异构化,即