Femtosecond Studies of the Influence of Solvent on Chemical Reaction Dynamics

Bradforth由实验物理化学计划支持，使用超快光谱方法探索溶剂对溶液中化学反应动力学的作用和程度。 将进行以下研究：（1）通过电荷转移到溶剂状态（CTTS）的电子光剥离，和（2）中性分子的溶液光解离，其中孤立分子动力学已被广泛表征的实验和理论。 一个新开发的50飞秒可调光源在光化学重要的245-350纳米区域将允许基准化学系统进行检查。 此外，将开发新的研究生课程，将光谱学和分子动力学纳入时域。从研究工作的结果预计将允许定量比较的理论，形成一个基础，了解在溶液中的化学反应的细节。 许多重要的化学反应在液体中进行。当化学反应在液体溶液中发生时，反应分子周围的液体会显着影响反应结果。 在这个项目中，溶液化学将在分子中原子运动的时间尺度上进行研究。 该项目的结果将导致对分子如何在水和其他液体中反应的新见解。

Bradforth is supported by the Experimental Physical Chemistry Program to use ultrafast spectroscopic methods to explore the role and magnitude of the solvent effect on chemical reaction dynamics in solution. The following studies will be carried out: (1) electron photodetachment via transitions to charge transfer to solvent states (CTTS), and (2) solution photodissociation of neutral molecules for which the isolated molecule dynamics have been extensively characterized both experimentally and theoretically. A newly developed 50 femtosecond tunable light source in the photochemically important 245-350 nanometer region will allow benchmark chemical systems to be examined. In addition, new graduate level courses that incorporate spectroscopy and molecular dynamics in the time domain will be developed. Outcomes from the research effort are expected to permit quantitative comparisons to theory, forming a basis for understanding the details of chemical reactions in solution. Much important chemistry takes place in liquids. When chemical reactions occur in liquid solutions, the liquid that surrounds the reacting molecules can affect the reaction outcomes significantly. In this project, solution chemistry will be examined on the timescales of atomic motion in molecules. Results from this project will lead to new insights into how molecules react in water and other liquids.