Functional Architectures for Electron Transfer in Solution and on Electrodes

溶液中和电极上电子转移的功能架构

• 批准号: 0108945
• 负责人: Matthew Zimmt
• 金额: $ 32.2万
• 依托单位: Brown University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-08-15 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0108945&HistoricalAwards=false
• 关键词: Functional; Architectures; Electron; Transfer; Solution

Professor Matthew B. Zimmt, of the Department of Chemistry at Brown University, is supported by the Organic and Macromolecular Chemistry Program for his studies of functional architectures for electron transfer in solution and at electrodes. A molecular scaffold will hold an electron donor and acceptor at a fixed distance and orientation without providing significant electronic coupling. Function will be introduced into this "test bridge" by attaching materials of interest to the scaffold, directly between the donor and acceptor. The donor/acceptor coupling provided by these molecular "test elements" will be determined through measurement and analysis of photoinduced electron transfer rate constants. A variety of test elements, representing structures found in biological and technological electron transfer systems, will be examined. Analogous introduction of function at electrode surfaces will also be explored, through the design, synthesis, and analysis of molecules which bind specifically to electrode surfaces.Electron transfer events occur in many important processes in chemistry and biology as well as in technological applications. Beyond their ubiquity, electron transfer reactions are of fundamental interest for their unique structural, thermodynamic, and medium dependence. The nature of the material lying between the electron donor and the electron acceptor exerts a considerable influence on the dynamics of the electron transfer event. The nuclear and electronic structures of the intervening material determine the nature of the transfer event, which may involve a hop into bound states of the material (conduction) or tunneling through virtual states of the material. By designing materials whose structure is susceptible to specific external stimuli and with the support of the Organic and Macromolecular Chemistry Program, Professor Matthew B. Zimmt, of the Department of Chemistry at Brown University, is exploring the possibility of rationally controlling the nature and dynamics of electron transfer processes.

布朗大学化学系的Matthew B.Zimmt教授得到了有机化学和高分子化学计划的支持，他研究了溶液中和电极上电子转移的功能结构。分子支架将电子供体和受体保持在固定的距离和方向上，而不会提供显著的电子耦合。通过将感兴趣的材料直接连接到支架上，供体和受体之间的直接连接，功能将被引入到这个“测试桥梁”中。这些分子“测试元件”提供的施主/受主耦合将通过光致电子转移速率常数的测量和分析来确定。各种测试元件，代表在生物和技术电子转移系统中发现的结构，将被检查。还将通过设计、合成和分析与电极表面特异结合的分子来探索在电极表面引入类似的功能。电子转移事件发生在化学、生物和技术应用中的许多重要过程中。除了无处不在的电子转移反应，电子转移反应因其独特的结构、热力学和介质依赖性而引起人们的根本兴趣。位于电子给体和电子受体之间的材料的性质对电子转移事件的动力学有相当大的影响。中间材料的核和电子结构决定了转移事件的性质，这可能涉及跳跃到材料的束聚态(传导)或通过材料的虚态隧道。通过设计其结构对特定外部刺激敏感的材料，并在有机和高分子化学计划的支持下，布朗大学化学系的Matthew B.Zimmt教授正在探索合理控制电子转移过程的性质和动力学的可能性。