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

在这个由化学分部化学结构、动态和机制B项目资助的项目中，俄亥俄大学化学和化学生物系的Jeffrey Rack教授将开发新型的光致变色过渡金属配合物。光致变色复合物是那些暴露在光线下改变颜色的复合物。本研究的目标是创造这些配合物的新例子，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。本项目处于无机化学、物理化学和材料化学的交叉领域，适合各级科学家的教育。将作出特别努力，培训来自传统上在科学领域代表性不足的群体的学生。该项目的总体目标是增加光致变色过渡金属配合物的数量和类型，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。光致变色过渡金属配合物能有效、快速地将光子能量转化为势能，从而触发激发态电子和分子结构重排。作用模式是键合亚砜从S到O和O到S的激发态连接异构。该项目将在三个特定目标上研究这些系统：1)合成新的光致变色亚砜铜配合物，2)创建包含亚砜钌配合物的新光折射材料，3)利用超快泵浦探针光谱研究现有的和新的配合物。

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.