Exploration of Solvent Mediated Electronic Coupling in Electron Transfer and Energy Transfer Reactions

电子转移和能量转移反应中溶剂介导的电子偶联探索

• 批准号: 9708351
• 负责人: Matthew Zimmt
• 金额: $ 32万
• 依托单位: Brown University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-07-01 至 2001-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9708351&HistoricalAwards=false
• 关键词: Exploration; Solvent; Mediated; Electronic; Coupling

Professor Matthew B. Zimmt, of the Department of Chemistry at Brown University, is supported by the Organic Dynamics Program and the Office of Multidisciplinary Activities of the Mathematical and Physical Sciences Directorate for his exploration of solvent-mediated electronic coupling in electron transfer and energy transfer reactions. The mediation of electronic coupling between an electron donor and an electron acceptor by the surrounding medium represents an essential element in chemical and biological electron transfer. Through the synthesis of a family of molecules bearing donor and acceptor moieties attached to a common rigid spacer, Professor Zimmt explores the role of intervening solvents in electron transfer processes, addressing the generality of solvent-mediated coupling in electron-mediated and hole-mediated processes, the dependence of solvent-mediated coupling on solvent properties and on donor-bridge-acceptor electronic symmetry, the effects of interference between solvent- and bond-mediated coupling, and the relevance of solvent-mediated electronic coupling to triplet energy transfer. Reactions in which an electron is transferred from one molecule to another form the basis of a wide range of important chemical and biological processes, including the photosynthetic capture and utilization of energy from sunlight by plants. With the support of the Organic Dynamics Program and the Office of Multidisciplinary Activities of the Mathematical and Physical Sciences Directorate, Professor Matthew B. Zimmt, of the Department of Chemistry at Brown University, studies chemical factors influencing the transfer of an electron from one molecule to another. By constructing molecules designed to hold the donor and the acceptor of the electron with a well-defined orientation and spacing with respect to one-another, Professor Zimmt examines the role of intervening solvent molecules in mediating the electron transfer process. These model studies shed light on the fundamental factors controlling biological electron transfer reactions and are of additional relevance to areas such as the design and construction of molecular-scale electronic devices.

布朗大学化学系的Matthew B.Zimmt教授得到了有机动力学项目和数学和物理科学局多学科活动办公室的支持，以探索电子转移和能量转移反应中溶剂介导的电子耦合。在化学和生物电子转移中，电子供体和电子受体之间的电子耦合是化学和生物电子转移中的一个重要因素。通过合成一类连接在共同刚性间隔物上的带有给体和受体基团的分子，Zimmt教授探索了介入溶剂在电子转移过程中的作用，解决了电子介导和空穴介导的过程中溶剂介导的耦合的共性，溶剂介导的耦合对溶剂性质和给体-桥-受体电子对称性的依赖，溶剂和键介导的耦合之间的干扰效应，以及溶剂介导的电子耦合与三重态能量转移的相关性。电子从一个分子转移到另一个分子的反应构成了一系列重要的化学和生物过程的基础，包括植物通过光合作用捕获和利用来自阳光的能量。在有机动力学项目和数学和物理科学局多学科活动办公室的支持下，布朗大学化学系的Matthew B.Zimmt教授研究了影响电子从一个分子转移到另一个分子的化学因素。通过构建分子，使电子的供给者和接受者彼此之间具有明确的取向和间距，齐姆特教授研究了介入溶剂分子在调节电子转移过程中的作用。这些模型研究阐明了控制生物电子转移反应的基本因素，并与分子规模电子设备的设计和建造等领域具有额外的相关性。