Dynamics and Spectroscopy of Molecular Excited States

罗伯特·B·魏斯曼教授得到了实验物理化学项目的资助，该项目研究激发气相有机分子的光谱和动力学。这一研究将有助于加深我们对激光诱导光化学反应的理解。魏斯曼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。在一个项目中，魏斯曼将继续他对偶氮烷的光诱导解离和异构化的研究。这项工作将得到量子化学计算的补充，以支持魏斯曼根据他的实验结果提出的详细机制。在另一项研究中，魏斯曼将使用瞬变CARS来探索1，3-环己二烯的气相光解。基于最近开发的一种测量有机分子振动能量的碰撞损失的附加实验将被用来识别在对撞机中引起振动能量传递作为能量函数的意外变化的因素。最后，瞬时红外吸收将被开发为探测气相多原子的短寿命激发态的工具。

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.