Dynamics and Spectroscopy of Molecular Excited States

分子激发态的动力学和光谱学

• 批准号: 9007972
• 负责人: Robert Weisman
• 金额: $ 3.62万
• 依托单位: William Marsh Rice University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-09-01 至 1991-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9007972&HistoricalAwards=false
• 关键词: Dynamics; Spectroscopy; Molecular; Excited; States

Professor Robert B. Weisman is supported by a grant from the Experimental Physical Chemistry Program to study the spectroscopy and dynamics of excited gas phase organic molecules. This research will help to further our understanding of laser induced photochemical reactions. Weisman will employ nanosecond pulsed lasers to perform electronic and vibrational spectroscopy on excited states and photochemical products of organic compunds. In one project, Weissman will continue his study of the light-induced dissociation and isomerization of azoalkanes. This work is to be complemented by quantum chemical calculations in support of the detailed mechanism which Weisman has proposed based on his experimental findings. In another study Weisman will use transient CARS to explore the gas phase photodissociation of 1,3-cyclohexadiene. Additional experiments based on a recently developed method to measure the collisional loss of vibrational energy from organic molecules will be used to identify the factors that cause unexpected variations in vibrational energy transfer as a function of energy in the colliders. Finally, transient infrared absorption will be developed as a tool to probe short-lived excited states of gas phase polyatomics.

Robert B. Weisman教授获得实验物理化学计划的资助，研究激发态气相有机分子的光谱学和动力学。这项研究将有助于我们进一步了解激光诱导的光化学反应。Weisman将使用纳秒脉冲激光对有机化合物的激发态和光化学产物进行电子和振动光谱分析。在一个项目中，Weissman将继续他的光诱导偶氮烷烃离解和异构化的研究。这项工作将由量子化学计算来补充，以支持Weisman根据他的实验发现提出的详细机制。在另一项研究中，Weisman将使用瞬态CARS来探索1,3-环己二烯的气相光解。基于最近开发的测量有机分子振动能量碰撞损失的方法的附加实验将用于确定导致振动能量传递意外变化的因素，这些变化是对撞机中能量的函数。最后，瞬态红外吸收将成为一种探测气相多原子短寿命激发态的工具。