Time Resolved Studies of Solute Relaxation Dynamics in Liquids

液体中溶质弛豫动力学的时间分辨研究

• 批准号: 9013138
• 负责人: John Simon
• 金额: $ 38.5万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-08-01 至 1993-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9013138&HistoricalAwards=false
• 关键词: Time; Resolved; Studies; Solute; Relaxation

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.

实验物理化学项目支持Simon教授对液体介质中溶质弛豫、电荷转移和电子溶剂化的时间分辨研究。这些研究对详细的液体动力学过程提供了重要的见解。利用各种稳态和超快时间分辨技术，他正在研究溶剂介电摩擦如何影响分子旋转运动和光生电子的定位和溶剂化。动态溶剂化和振动弛豫在电荷转移中的作用也在研究中。一种基于时间分辨圆二色性测量的新方法被应用于极性和非极性流体中溶质弛豫的研究。研究了溶剂摩擦对分子内键周围旋转、分子反转和基态电位表面结构弛豫的影响。