Molecular Beam Studies of Small Free Radicals: State-Resolved Photodissociation and Reaction Dynamics

小自由基的分子束研究：状态分辨光解离和反应动力学

• 批准号: 9811400
• 负责人: Jingsong Zhang
• 金额: $ 29.6万
• 依托单位: University of California-Riverside
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-08-15 至 2001-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9811400&HistoricalAwards=false
• 关键词: Molecular; Beam; Studies; Small; Free

In this project supported by the Experimental Physical Chemistry Program of the Chemistry Division, Jingsong Zhang will pursue molecular beam studies of prototypical free radicals. This research program will be developed in three main areas: (1) photochemistry of small radicals such as C2H3, OH, and other small alkyl and alkoxy radicals, (2) benchmark radical reactions involving systems such as OH + CO and H + O2, and (3) energy transfer/state-resolved inelastic scattering in small model systems involving atomic hydrogen and colliding partners O2, CO2, and CO. Velocity distributions of the hydrogen atom products or scattering probes will be obtained via the high resolution high-n Rydberg atom time-of-flight (HRTOF) technique. The detailed state-resolved product energy and angular distributions obtained are expected to provide new insights into the photodissociation and reaction dynamics of these free radicals, and these benchmarks will in turn offer stringent tests for high-level theories. Free radicals are short-lived, highly reactive species that have one or more unpaired electrons. They play dominant roles in much of chemistry. The gas phase free radicals chosen for study in this project are of current interest and of practical importance for understanding atmospheric reactions and chemical combustion phenomena.

在该项目得到化学分部实验化学计划支持的项目中，Jingsong Zhang将进行原型自由基的分子束研究。 This research program will be developed in three main areas: (1) photochemistry of small radicals such as C2H3, OH, and other small alkyl and alkoxy radicals, (2) benchmark radical reactions involving systems such as OH + CO and H + O2, and (3) energy transfer/state-resolved inelastic scattering in small model systems involving atomic hydrogen and colliding partners O2, CO2, and CO. Velocity氢原子产物或散射探针的分布将通过高分辨率高N rydberg原子飞机（HRTOF）技术获得。 预期获得的详细状态分辨的产品能量和角度分布将为这些自由基的光解离和反应动力学提供新的见解，而这些基准反过来又将为高级理论提供严格的测试。 自由基是短寿命，高反应性的物种，具有一个或多个未配对的电子。 他们在化学的大部分时间中扮演着主导的角色。 在该项目中选择用于研究的气相自由基对于理解大气反应和化学燃烧现象具有当前感兴趣，并且具有实际意义。