Resonance Raman Studies of Dynamic Solvent Effects on Excited State Isomerization and Charge Transfer

在化学部实验物理化学计划的这个项目中，McHale将使用共振拉曼(RR)技术研究凝聚相中的分子间相互作用，特别是溶剂动力学对电荷转移过程的影响。拉曼激发谱将在甜菜碱和三苯基甲烷染料以及两个生色团系统中进行时间分析。结果将与超快光谱实验的结果进行比较。为了将溶剂动力学从能量学中分离出来，将使用溶剂的同位素取代，并将研究其他参数，如极性、粘度和极化率。这项研究的结果将有助于更好地理解溶剂对发生在其中的化学反应的影响。这项工作还将有助于理解如何通过使用不同的溶剂或使用激光来启动或加强反应来控制固态或液态的化学反应。

In this project in the Experimental Physical Chemistry program of the Chemistry Division, McHale will use resonance Raman (RR) techniques to study intermolecular interactions in the condensed phase, particularly the effects of solvent dynamics on charge transfer processes. Raman excitation profiles will be time-analyzed in systems such as betaine and triphenylmethane dyes, as well as in two-chromophore systems. Results will be compared with those from ultrafast spectroscopy experiments. To isolate solvent dynamics from energetics, isotopic substitution of the solvent will be employed, and other parameters such as polarity, viscosity, and polarizability will be investigated. %%% The results of this research will lead to a better understanding of the influence of a solvent on chemical reactions which are occurring in it. This work will also contribute to understanding how to control chemical reactions in solid or liquid phases by using different solvents or using lasers to initiate or enhance the reaction.