Photochromic Compounds and Materials: Photodiffraction, Dynamics, and Photomechanical Effects

在这个由化学系化学结构、动态和机理B计划资助的项目中，俄亥俄大学化学和化学生物系的Jeffrey Rack教授将开发新的光致变色过渡金属络合物。光致变色络合物是那些在光照下会改变颜色的络合物。这项研究的目的是创造新的例子，研究它们的性质，并发现由光致变色化合物组成的新的光活性材料。该项目位于无机化学、物理化学和材料化学的交界处，非常适合各级科学家的教育。将特别努力培训传统上在科学界代表性较低的群体的学生。该项目的总体目标是增加光致变色过渡金属络合物的数量和类型，发现新的光活性材料，并研究这些光致变色转变是如何发生的。光致变色过渡金属络合物能高效、快速地将光子能量转化为势能，从而引发激发态电子和分子结构重排。作用模式是一个键合的络合亚砜从S到O和O到S的激发态键合异构体。这个项目将通过三个特定的目标来研究这些体系：1)合成新的光致变色亚硫醚络合物，2)创造新的光折变材料，3)用超快泵浦-探测光谱研究现有的和新的络合物。

In this project funded by the Chemical Structure, Dynamic & Mechanism B Program of the Chemistry Division, Professor Jeffrey Rack of the Department of Chemistry and Chemical Biology at Ohio University will develop new classes of photochromic transition metal complexes. Photochromic complexes are those that change their color when exposed to light. The goal of this research is to create new examples of these complexes, to study their properties, and to discover new photoactive materials comprised of the photochromic compounds. The project lies at the interface of inorganic, physical, and materials chemistry, and is well suited to the education of scientists at all levels. Particular efforts will be made to train students from groups traditionally underrepresented in science. The overall goals of this project are to increase the number and types of photochromic transition metal complexes, to discover new photoactive materials, and to study how these photochromic transformations occur. Photochromic transition metal complexes efficiently and rapidly convert photonic energy to potential energy to trigger excited state electronic and molecular structural rearrangements. The mode of action is an excited state linkage isomerism of a bonded chelating sulfoxide from S to O and O to S. This project will examine these systems across three specific aims: 1) synthesis of new photochromic Cu sulfoxide complexes, 2) creation of new photorefractive materials comprising ruthenium sulfoxide complexes, 3) investigation of existing and new complexes by ultrafast pump-probe spectroscopy.