Dynamics of Polar Solvation and Electron Transfer in Restricted Environments

科罗拉多州立大学的Nancy Levinger教授由实验物理化学项目资助，对胶束中的溶剂化动力学进行实验研究。溶剂分子在反胶束系统中受到与胶束壁的界面相互作用的干扰，这是一个更复杂的环境，如在细胞和地质结构中发现的模型系统。在这个提案中，PI试图继续她以前在这些系统上的工作，使用各种先进的超快时间分辨方法，如斯托克斯位移和光子回波。具有代表性的胶束体系包括具有不同头团的胶束体系。超快电子转移过程也将被探索。总体目标是全面了解反胶束内部的受限环境如何影响溶剂的动力学行为，并了解这如何影响化学反应。这些结果将有助于科学家研究生物和地球化学微环境中的反应和过程，如土壤、岩石、生物细胞和细胞器，在这些微环境中，溶剂的作用知之甚少。

Professor Nancy Levinger of Colorado State University is funded by the Experimental Physical Chemistry program to perform experimental studies on solvation dynamics in micelles. Solvent molecules inside reverse micelle systems are perturbed by interfacial interactions with the walls of the micelle, and this is a model system for the more complicated environments such as those found in cells and in geological structures. In this proposal the PI seeks to continue her previous work on these systems using a variety of advanced ultrafast time-resolved methods such as Stokes shift and photon echoes. Representative micellar systems include ones with varying head groups. Ultrafast electron transfer processes are also to be probed. The overall goal is to develop a comprehensive understanding of the way in which restricted environments inside reverse micelles influence dynamical behavior of the solvent and to understand how this influences chemical reactions. The results will aid scientists studying reactions and processes in biological and geochemical microenvironments such as soils, rocks and biological cells and organelles where the effect of the solvent is poorly understood.