Dynamics and Spectroscopy of Molecular Excited States

在化学学部实验物理化学项目的这个项目中，Weisman将研究偶氮烷烃和小芳香分子在纳秒脉冲紫外线辐射下的动力学和光谱。偶氮烷烃的光诱导离解和异构化研究将继续和扩展，量子力学计算将进行，以产生光化学的详细机制理解。进行了瞬态吸收和瞬态CARS实验。在这个项目中，将探索和阐明能量激发的多原子分子松弛到非激发的基能态的机制。有些放松计划很复杂，很难解开。尽管如此，了解参与能量松弛的不同步骤对于预测相关分子系统中可能发生的解离和异构化的相对数量是很重要的。

In this project in the Experimental Physical Chemistry program of the Chemistry Division, Weisman will study the kinetics and spectroscopy of azoalkanes and small aromatic molecules subjected to nanosecond pulses of uv radiation. Light-induced dissociation and isomerization studies of azoalkanes will be continued and extended, and quantum mechanical calculations will be conducted to yield a detailed mechanistic understanding of the photochemistry. Some transient absorption and transient CARS experiments will be performed. %%% The mechanisms by which energetically excited polyatomic molecules are relaxed down to their unexcited ground energy state will be explored and clarified in this project. Some of the relaxation schemes are complex and challenging to unravel. Nonetheless, knowledge of the different steps involved in energy relaxation is important to be able to predict the relative amounts of dissociations and isomerizations that can occur in related molecular systems.