Mixed-Metal Supramolecular Complexes as Photochemical Molecular Devices for Photoinitiated Electron Collection

混合金属超分子配合物作为光化学分子器件用于光引发电子收集

• 批准号: 9313642
• 负责人: Karen Brewer
• 金额: $ 24.75万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-12-15 至 1997-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9313642&HistoricalAwards=false
• 关键词: Mixed; Metal; Supramolecular; Complexes; Photochemical

This award in the Inorganic, Bioinorganic, and Organometallic Program supports research on photoinitiated electron transfer reactions by Dr. Karen J. Brewer of the Chemistry Department, Virginia Polytechnic Institute. Trimetallic complexes which covalently couple two light-absorbing metal centers to a central metal section through polypyridyl bridging ligands will be synthesized. In these complexes, low lying unoccupied orbitals on the ligand are capable of accepting electrons and mediating the electron transfer between metal sites. The photophysical and electrochemical properties of these complexes will be studied in order to find the optimal conditions for promoting electron build-up, as well as to understand the details of multi-electron transfer. Many important reactions in nature, such as the reduction of carbon dioxide and nitrogen fixation, require many electrons. The goal of this project is to investigate a method for promoting multi-electron transfer reactions. Metal complexes which can each contribute electrons will be linked together in large molecules. Light will be used to drive electrons between metal centers so that a number of electrons can be available for reaction. Although it is concerned with only a part of the process, this study is expected to provide basic information related to the development of solar-powered devices which could be used to promote a variety of chemical reactions.

该奖项在无机，生物无机和有机物计划支持研究光引发的电子转移反应的博士凯伦J布鲁尔化学系，弗吉尼亚理工学院。 通过多吡啶桥联配体将两个吸光金属中心共价偶联到中心金属部分的三金属配合物将被合成。 在这些配合物中，配体上的低位未占轨道能够接受电子并介导金属位点之间的电子转移。 将研究这些配合物的物理和电化学性质，以找到促进电子积聚的最佳条件，以及了解多电子转移的细节。 自然界中许多重要的反应，如二氧化碳的还原和固氮，都需要大量的电子。本课题的目的是研究促进多电子转移反应的方法。 每个能贡献电子的金属络合物将在大分子中连接在一起。 光将被用来驱动金属中心之间的电子，以便许多电子可以用于反应。虽然这项研究只涉及这一过程的一部分，但预计将提供与开发可用于促进各种化学反应的太阳能装置有关的基本信息。