Transition Metal Complexes Containing Quinone and Hydroxyquinone Ligands

在这个项目中，无机，生物无机， 化学部的有机物计划，皮尔庞特将 继续研究过渡金属络合物， 电活性有机配体。 合成和 含有过渡金属络合物的表征 邻苯二酚、半醌及相关电活性有机物 将追求配体。 这些配合物表现出选择性 在金属或配体处的氧化还原活性，从而允许 金属醌分子内电子转移研究 反应. 本文研究了聚乙烯的光化学和物理性质， 铂族金属的醌络合物将 考察 将研究多核配合物系综 因为它们在光转化过程中作为催化剂的活性。 金属醌分子内电子的电子效应 转移反应及其与 生物无机反应将在功能模型中进行研究， 金属酶过程 %%% 儿茶酚，醌和其他醌类分子是常见的 生物系统的组成部分，其中它们通常 与金属离子结合起作用。 在某些情况下，这些 分子在金属的结合和运输中起作用， 在其他情况下，它们的金属络合物在电子中起作用， 转移和/或衬底活化。 半醌和 儿茶酚金属配合物，将在此合成 该项目将作为类似天然分子的模型。

In this project in the Inorganic, Bioinorganic, and Organometallic Program of the Chemistry Division, Pierpont will continue studies on transition metal complexes that contain electroactive organic ligands. The synthesis and characterization of transition metal complexes that contain catecholate, semiquinone, and related electroactive organic ligands will be pursued. These complexes exhibit selective redox activity at either the metal or ligand, thus allowing investigation of intramolecular metal-quinone electron transfer reactions. The photochemical and photophysical properties of quinone complexes of the platinum group metals will be examined. Multinuclear complex ensembles will be investigated for their activity as catalysts in photoconversion processes. Electronic effects in intramolecular metal-quinone electron transfer reactions and their potential involvement with bioinorganic reactions will be studied in functional models for metalloenzymatic processes. %%% Catechols, quinones and other quinoid molecules are common components of biological systems, in which they usually function in association with metal ions. In some cases these molecules function in the binding and transport of metals, and in other cases their metal complexes have a role in electron transfer and/or substrate activation. The semiquinone and catecholate metal complexes which will be synthesized in this project will serve as models of the similar natural molecules.