Development of a Laser Photofragmentation-Laser Induced Fluorescence Technique for the Study of Hydroperoxyl Radical Kinetics

这项研究计划为期两年，包括开发一种新的光裂解-激光诱导荧光技术来研究大气条件下的过氧化氢(HO2)自由基动力学。它建立在实验室动力学研究中以高灵敏度检测羟基(HO)自由基的已证明能力的基础上。单脉冲激光系统将被用来光解HO2，产生OH光碎片，然后用激光诱导荧光检测。激光闪光光解将用于产生HO2。最初的工作将集中在确定最优的HO检测方案，以最大化灵敏度和最小干扰。将使用四种可能的HO2产生方案来研究过氧化氢自由基与一氧化氮反应的动力学。

This research program is two years in duration and involves the development of a novel photofragmentation-laser induced fluorescence technique for the study of hydroperoxyl (HO2) radical kinetics under atmospheric conditions. It builds on a demonstrated capability to detect hydroxyl (HO) radicals with high sensitivity in laboratory kinetic studies. A single pulsed laser system will be used to photodissociate HO2, generating OH photofragments which will then be detected by laser induced fluorescence. Laser flash photolysis will be used to generate HO2. Initial work will focus on determining the optimal HO detection scheme to maximize sensitivity and minimis interferences. Four potential HO2 production schemes will be used to study the kinetics of the reaction of the hydroperoxyl radical with nitric oxide.