Reactions Involving Small Molecular Free Radicals

涉及小分子自由基的反应

• 批准号: 9020727
• 负责人: Paul Dagdigian
• 金额: $ 28.35万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-01-01 至 1993-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9020727&HistoricalAwards=false
• 关键词: Reactions; Involving; Small; Molecular; Free

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.

Dagdigian 教授得到实验物理化学项目的资助，通过分析激光激发时产物发出的光来研究交叉分子束中分子片段之间的化学反应。 这些研究的动机是回答这个问题：发生这些反应的许多可能的势能表面对产物分子的分布和产生它们的能态有何影响？ 在该项目中，将通过使用激光荧光检测技术确定产物内态分布来对涉及分子自由基的反应动力学进行实验研究。 由于两种试剂上都有不成对的电子，这些反应必然涉及多个势能表面。 不同表面的影响应该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究氧原子与通过受激拉曼激发制备的振动激发试剂的反应。