The Dynamics of Chemical Reactions Involving Free Radicals and Excited Species

涉及自由基和激发态物质的化学反应动力学

• 批准号: 9313722
• 负责人: Paul Dagdigian
• 金额: $ 32.09万
• 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: 1994
• 资助国家: 美国
• 起止时间: 1994-01-01 至 1996-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9313722&HistoricalAwards=false
• 关键词: Dynamics; Chemical; Reactions; Involving; Free

In this project in the Experimental Physical Chemistry Program of the Chemistry Division, Paul Dagdigian will study the gas-phase dynamics of atoms and small molecular free radicals in molecular beams. Laser-induced fluorescence will be used to determine the internal product state distributions. Both atom-radical and radical-radical reactions will be studied. In a new direction for his research program, Dagdigian will examine the reaction of oxygen and chlorine atoms with vibrationally excited methane isotopomers using stimulated Raman excitation to prepare the molecular reagents. The reactions of excited Al atoms with H2 will be investigated using emission and laser-induced fluorescence detection. In this project Dagdigian will study the effect on the rate or pathway of a chemical reaction of energizing one of the reacting partners with a specific type of excitation. Atoms with a large amount of excitation will be reacted with certain molecules, or other larger molecules with lesser amounts of excitation will be reacted with atoms. Such studies will permit an understanding of the effect on reactions of exciting these different modes in the reacting atoms and molecules. These are very fundamental studies which could impact practical areas such as semiconductor or materials manufacturing.

在这个实验物理化学项目中， 化学部，保罗Dagdigian将研究 原子和小分子自由基的气相动力学 在分子束中。 激光诱导荧光将用于确定内部产物状态分布。 两 将研究原子-自由基和自由基-自由基反应。 在 一个新的方向，他的研究计划，Dagdigian将 研究氧原子和氯原子与 振动激发的甲烷同位素异构体， 拉曼激发制备分子试剂。 的 将研究激发态Al原子与H2的反应 使用发射和激光诱导荧光检测。 在这个项目中，Dagdigian将研究对利率的影响， 一种化学反应的途径， 有特定兴奋类型的反应伴侣。 原子 大量的激发将与某些 分子，或其他较大分子， 激发将与原子反应。 这些研究将 使我们能够理解刺激对反应的影响， 这些不同的原子和分子反应模式。 这些都是非常基础的研究， 例如半导体或材料制造领域。