Presidential Young Investigator Award/Cation Radical Photochemistry.

这项在有机动力学计划中颁发的总统青年研究人员奖支持了罗切斯特大学的Joshua L.Goodman博士的研究。这项工作旨在准确描述化学反应中形成的高能物种的性质，并将提高我们对化学反应如何发生的基本理解。古德曼博士将进行的实验将跨越三个领域：(1)研究视网膜蛋白质以确定光能如何驱动化学反应和生物反应，(2)研究有机活性中间体的结构和能量之间的关系，(3)轨道对称性选择规则对奇电子光化学反应的适用性。这项工作将利用时间分辨光声热法，它允许测量系统在受光激励扰动后的微观体积变化。这些体积变化的大小可能与反应热焓和涉及活性中间体的体积变化有关。光声检测方法将扩展到光引发以外的激活方法。

This Presidential Young Investigator Award given in the Organic Dynamics Program supports the research of Dr. Joshua L. Goodman of the University of Rochester. This work is aimed at describing accurately the properties of high-energy species that are formed in chemical reactions, and it will improve our basic understanding of how chemical reactions occur. The experiments that will be carried out by Dr. Goodman will span three areas: (1) the study of retinal proteins to determine how light energy drives chemical and biological reactions, (2) the investigation of relationships between structure and energy for organic reactive intermediates, and (3) the applicability of orbital symmetry selection rules to odd-electron photochemical reactions. The work will utilize time-resolved photoacoustic calorimetry, which allows measurement of microscopic volume changes of a system following perturbation by photoexcitation. The magnitudes of these volume changes can be related to reaction enthalpies and to volume changes involving reactive intermediates. The photoacoustic detection method will be extended to methods of activation other than photoinitiation.