Dynamics and Spectroscopy of Molecular Excited States

在《实验物理化学》中，这项拨款支持罗伯特·魏斯曼博士的研究，他开发了瞬时相干拉曼光谱技术，直接研究有机分子中的激发态过程。这些实验使人们能够直接观察到重要的光化学和光物理过程。在理论化学和应用化学的几个分支中，了解这些过程是很重要的。在计划中的研究中，瞬变CARS技术将被用来拍摄激发样品分子的振动光谱，因为它们的性质在纳秒时间尺度上发生变化。魏斯曼将追踪吡啶和二硫化碳等多原子分子的非辐射弛豫路径，并检查它们的激发态结构。他还将研究选定的气相自由基，如环丙基和“热”(振动激发的)分子的振动光谱。

This grant, in Experimental Physical Chemistry, supports research of Dr. Robert Weisman, who has developed the technique of transient coherent Raman spectroscopy to directly study excited state processes in organic molecules. These experiments enable important photochemical and photophysical processes to be directly observed. Understanding such processes is important in several branches of pure and applied chemistry. In the planned research the transient CARS technique will be used to take "snapshots" of excited sample molecules' vibrational spectra as their properties change on the nanosecond time scale. Weisman will trace the nonradiative relaxation pathways of polyatomic molecules such as pyridine and carbon disulfide and examine the structures of their excited states. He will also study the vibrational spectra of selected gas phase radicals such as cyclopropyl and of "hot" (vibrationally excited) molecules.