Time Resolved Studies of Solute Relaxation Dynamics in Liquids

实验物理化学计划支持教授 西蒙对溶质弛豫的时间分辨研究， 电荷转移和液体介质中的电子溶剂化。 这些 研究提供了重要的洞察详细的动力学 在液体状态下进行。 使用各种稳态和超快时间分辨 技术，他正在研究如何溶剂介电摩擦 影响分子的旋转运动和局部化 和光生电子的溶剂化。 动态的作用 还讨论了电荷转移中的溶剂化和振动弛豫， 被研究。 一种基于时间分辨 圆二色性的测量被应用于该研究 极性和非极性流体中的溶质弛豫。 的 溶剂摩擦对分子内转动的影响 键，分子反转，和结构弛豫， 正在检查基态电势表面。

The Experimental Physical Chemistry Program supports Professor Simon's time-resolved investigations of solute relaxation, charge transfer, and electron solvation in liquid media. These studies give important insight into detailed dynamical processes in the liquid state. Using a variety of steady state and ultrafast time-resolved techniques, he is examining how solvent dielectric friction influences molecular rotational motions and the localization and solvation of photogenerated electrons. The role of dynamic solvation and vibrational relaxation in charge transfer is also being studied. A new approach based on time-resolved measurement of circular dichroism is being applied to the study of solute relaxation both in polar and nonpolar fluids. The effects of solvent friction on intramolecular rotations around bonds, on molecular inversion, and on structural relaxation on ground state potential surfaces are being examined.