Spectroscopic Determinations of Excited State Properities of Organometallic and Inorganic Compounds

9407289 Zink U.来自加州-洛杉矶的杰弗里·I博士Zink，化学系，加州-洛杉矶大学，是由无机，生物无机和有机化学计划的化学部的研究含金属分子的电子激发态的支持。激发态的几何形状将确定从高分辨率的振动结构的发射和激发光谱的分子在冷碰撞的条件下的超音速自由膨胀射流和激发态泵浦探测拉曼光谱。共振拉曼激发曲线和低温单晶偏振电子吸收和发射光谱将用于确定激发态的畸变。这些研究的目标是激发势面的统一理解，这将导致理解的几何形状，反应性，电子结构和振动相互作用发生的金属络合物在其激发态。 在正常稳定的分子发生化学反应之前，它们必须被“激发”，使它们变得不稳定，更具反应性。该项目旨在确定含金属化合物在被能量“激发”时发生的变化。这很重要，因为为了预测分子的化学行为，必须理解分子的“激发态”。这项研究将集中在一些分子，这是重要的建立一个普遍的理解的行为的“激发态”和一些有重要的反应，发生在气相中，如那些用作前体的电子材料。

9407289 Zink U. of California - Los Angeles Dr. Jeffrey I. Zink, Chemistry Department, University of California - Los Angeles, is supported by the Inorganic, Bioinorganic, and Organometallic Chemistry Program of the Chemistry Division for research into the electronic excited states of metal-containing molecules. Excited state geometries will be determined from highly resolved vibronic structure in emission and excitation spectra of molecules in the cold collision-free conditions of a supersonic free expansion jet and by excited state pump-probe Raman spectroscopy. Resonance Raman excitation profiles and low temperature single crystal polarized electronic absorption and emission spectroscopy will then be used to determine distortions in the excited state. The goal of these studies is a unified understanding of excited potential surfaces which will lead to an understanding of the geometries, reactivities, electronic structure and vibronic interactions which occur as metal complexes are in their excited states. Before normally stable molecules will undergo chemical reactions, they must be "excited" so that they become less stable and more reactive. This project aims at determining what changes metal containing compounds undergo as they are "excited" by the addition of energy. This is important because the "excited state" of a molecule must be understood in order to predict its chemical behavior. This investigation will concentrate on some molecules which are important to establishing a general understanding of the behavior of "excited states" and some which have important reactions which occur in the gas phase, such as those used as precursors for electronic materials.