Investigation of Reactive Intermediates Using Photoacoustic Calorimetry

有机动力学计划的这笔赠款支持 约书亚L.博士继续工作。古德曼大学 罗切斯特。 这项工作将提高我们对 化学反应发生的基本过程。 古德曼博士将要进行的实验 利用时间分辨的光声量热法， 测量系统的微观体积变化， 光激发 这些体积变化的幅度可以是 与化学反应和体积变化有关， 活性中间体 调查将集中在 涉及离子自由基和卡宾的过程。 新型双激光器 将开发一种使用第一个激光脉冲的系统 以产生反应性中间体和第二激光脉冲 用于光激发中间体。

This grant from the Organic Dynamics Program supports the continuing work of Dr. Joshua L. Goodman of the University of Rochester. This work will improve our basic understanding of the fundamental processes by which chemical reactions occur. The experiments that will be carried out by Dr. Goodman will utilize time-resolved photoacoustic calorimetry, which allows measurement of microscopic volume changes of a system following photoexcitation. The magnitude of these volume changes can be related to reaction enthalpies and to volume changes involving reactive intermediates. The investigation will focus on processes involving ion radicals and carbenes. A new two-laser system will be developed in which the first laser pulse is used to generate the reactive intermediate and a second laser pulse is employed to photoexcite the intermediate.