Dynamics of Photodissociation of Small Molecules

这项研究是实验物理化学计划的一部分，重点是光解的实验和理论研究。我们将用光谱技术阐明电子激发态(S)势面(S)的早期动力学细节。光解离是光化学中最重要的过程，是单分子反应中研究最广泛的一类。该方法依赖于吸收光谱和/或拉曼光谱的使用。基本测量是基态振动数长进程的绝对拉曼截面。这些测量将在组成所研究的解离连续体的吸收系统内的几个波长下进行。散射光的偏振特性将与其他测量一起确定。理论工作将直接支持实验工作，将包括对正在进行实验的特定分子进行建模的动态研究。要研究的分子包括：卤代烃、过氧化氢、臭氧和丙酮。

This research, part of the Experimental Physical Chemistry Program, focusses on experimental and theoretical studies of photodissociation. Details of early-time dynamics on the potential surface(s) of the electronically excited state(s) will be elucidated by means of spectroscopic techniques. Photodissociation is a process of central importance in photochemistry and represents one of the most widely studied classes of unimolecular reactions. The approach relies on the use of absorption spectroscopy and/or Raman spectroscopy. The basic measurements are the absolute Raman cross-sections for long progressions in ground-state vibrational numbers. These measurements will be done at several wavelengths within the absorption system comprising the dissociative continuum being studied. The polarization properties of the scattered light will be determined along with the other measurements. The theoretical work which will be directly supportive of the experimental work, will include dynamic studies modelling the specific molecules for which experiments are being done. Molecules to be studied include: alkylhalides, hydrogen peroxide, ozone and acetone.