Reactions Involving Small Molecular Free Radicals

达格迪吉安教授得到了实验物理化学计划的资助，该计划通过分析激光激发下产物发出的光来研究交叉分子束中分子碎片之间的化学反应。这些研究的动机是回答这样一个问题：这些反应发生在其上的许多可能的势能面对产物分子的分布和它们产生的能量状态有什么影响？在这个项目中，我们将利用激光荧光检测技术，通过测定产物的内态分布来实验研究涉及分子自由基反应的动力学。由于两种试剂上都有未配对的电子，这些反应必然涉及多个势能面。不同表面的影响应体现在不同产品渠道之间的分支上。将通过测量羟基产物的内部分布来探索氧原子与振动激发试剂的反应，该反应将由受激拉曼激发制备。

Professor Dagdigian is supported by a grant from the Experimental Physical Chemistry Program to study the chemical reactions between fragments of molecules in crossed molecular beams by analysing the light emitted by the products upon laser excitation. The motivation for these studies is to answer the question: What is the effect of having many possible potential energy surfaces on which these reactions occur on the distribution of product molecules and on the energy states in which they are produced? In this project the dynamics of reactions involving molecular free radicals will be experimentally investigated through the determination of product internal state distributions using the laser fluorescence detection technique. Because of the unpaired electrons on both reagents, these reactions necessarily involve multiple potential energy surfaces. The influence of the different surfaces should be manifest in the branching between different product channels. The reactions of oxygen atoms with vibrationally excited reagents, which will be prepared by stimulated Raman excitation, will be probed through measurement of the hydroxyl product internal distribution.