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，涉及 一种新型的光致碎裂-激光诱导 研究过氧化氢自由基的荧光技术 大气条件下的动力学。 它建立在一个演示的 能够以高灵敏度检测羟基（HO）自由基 在实验室动力学研究中。 单脉冲激光系统将 用于光解HO 2，产生OH光碎片， 然后通过激光诱导荧光检测。 激光闪光 光解将用于产生HO 2。 初期工作将集中于确定最佳HO 检测方案，以最大限度地提高灵敏度和最小干扰。 将使用四种可能的HO 2生产方案来研究 过氧化氢自由基与硝酸反应动力学 环氧

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.