Photochemical and Photophysical Mechanisms of Transition Metal Complexes

Peter Ford博士，加州大学圣巴巴拉分校化学系，受到无机、生物无机和有机金属化学项目的支持，研究过渡金属配位和有机金属配合物的光反应和光物理机制。本文将合成一系列强发光的含Cu(I)的单核和簇状化合物，并利用连续波和脉冲激光激发对其进行光谱表征，利用发射和瞬态吸收检测确定其单分子和双分子ES动力学。配合物的光谱和键合性质将借助理论计算进行评价。本文将研究几种一氧化氮配合物的光化学性质，以了解配位一氧化氮的基本性质，并制备可作为溶液一氧化氮传感器的双发色团系统。当光被分子吸收时，分子获得的能量有时会以不同波长的光（这被称为发光）的形式重新发射，有时会在分子内引发化学反应。这个项目旨在探索这两种可能性。通过使用一系列特殊设计的铜化合物，可以了解发光发生的细节。这对于例如发光电子器件的设计具有重要意义。在另一部分中，将考察一氧化氮（NO）金属配合物暴露在强光下的反应。这与设计能够检测溶液中具有重要生化作用的一氧化氮的传感器有关。

9400919 Ford U. of Calif. - Santa Barbara Dr. Peter Ford, Chemistry Department, University of California - Santa Barbara, is supported by the Inorganic, Bioinorganic, and Organometallic Chemistry Program for studies of the photoreaction and photophysical mechanisms of transition metal coordination and organometallic complexes. A series of strongly luminescing mononuclear and cluster compounds containing Cu(I) will be synthesized and spectroscopically characterized using both CW and pulse laser excitations, and the uni- and bimolecular ES dynamics will be determined by emission and transient absorption detection. The spectroscopic and bonding properties of the complexes will be evaluated with the aid of theoretical calculations. The photochemistry of several nitric oxide complexes will be examined both in order to understand the fundamental properties of coordinated NO and to prepare dual chromophore systems which might serve as sensors for solution NO. When light is absorbed by a molecule, the energy which the molecule acquires is sometime re-emitted as light of a different wave length (this is called luminescence) and sometimes by initiating a chemical reaction within the molecule. This project is designed to probe both possibilities. By using a specially designed series of copper compounds the details of how luminescence occurs. This has great importance to, for example, the design of light emitting electronic devices. In another portions the reactions of metal complexes of nitric oxide (NO) will be examined as the complexes are exposed to intense light. This has relevance to the design of sensors which can detect NO, which has important biochemical roles, in solution.