Excited State Reactivity of Copper(I) Complexes in Solution

化学部门的无机、生物无机和有机金属化学项目支持Wayne堡印第安纳普渡大学化学系Kenneth Stevenson教授对溶液中铜(I)配合物的激发态反应性的研究。紫外光激发含有给体配体（如卤化物、氰基、氨基和烷基）的铜(I)配合物的水溶液，会形成反应性物质，包括激络合物，即激发态和基态物质之间形成的配合物，以及可能的准分子，即由激发态和基态物质形成的激发二聚体。在某些情况下，异构体或准分子可以通过桥接配体形成键；在其他情况下，聚集激发态中的键合可能具有金属-金属键，这是一种非常罕见的现象。该项目的目标是扩大对这些激发态物种的理解，并寻找产生它们的新复合物。利用激光闪光光解、时间分辨和稳态荧光光谱法对铜(I)配合物的光化学和光物理进行了系统的研究。各种激发态物种的形成和/或衰变速率将被确定，各种中间产物和能量关系将被确定。铜在电子学中有许多重要的应用。这项研究将集中于铜配合物与强激光产生的极短脉冲相互作用的方式。这将提供有关铜化合物如何影响光能转化为化学能的信息，以及它们如何通过吸收光来调节电能的产生。这个项目的一个特别重要的部分是本科生的大量参与。该项目将介绍这些学生在他们的教育经历的早期阶段进行研究。

The Inorganic, Bioinorganic, and Organometallic Chemistry Program of the Chemistry Division is supporting Professor Kenneth Stevenson, Chemistry Department, Indiana-Purdue University at Fort Wayne, for the study of the excited state reactivity of copper(I) complexes in solution.The ultraviolet excitation of aqueous solutions of copper(I) complexes containing donor ligands, such as halide, cyano, amido, and alkyl, results in the formation of reactive species that include exciplexes, i.e. complexes formed between excited state and ground state species, and possibly excimers, i.e. excited dimers formed by excited and ground-state species. In some cases the exciplexes or excimers may form a bond through a bridging ligand; in other cases the bonding in the aggregated excited species may have metal-metal bonding, a very rare phenomenon. The goal of this project is to expand the understanding of these excited-state species, and to search for new complexes that generate them. A systematic study of the photochemistry and photophysics of copper(I) complexes will be conducted utilizing laser flash photolysis and time-resolved and steady-state spectrofluorimetry. The rates of formation and/or decay of the various excited state species will be determined and the various intermediates and energy relationships will be determined. Copper has many important applications in electronics. This study will concentrate on the way copper complexes interact with very short bursts of intense laser generated light. This will provide information on the ways that copper compounds can effect the conversion of light energy to chemical energy and how they can mediate the generation of electrical energy by the absorbtion of light. A particularly significant part of this project is the heavy involvement of undergraduate students. The project will introduce these students to research at an early stage in their educational experience.