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

马修教授B。布朗大学化学系的齐姆特说， 大学，是由有机动力学计划和办公室的支持 数学和物理科学多学科活动 溶剂介导的电子耦合探索理事会 电子转移和能量转移反应。 的调解 电子供体和电子受体之间的电子耦合， 周围介质代表化学中的基本元素， 生物电子转移 通过一个家庭的合成， 带有供体和受体部分的分子， 间隔，教授Zimmt探讨了干预溶剂的作用， 电子转移过程，解决的一般性 电子介导和空穴介导中溶剂介导的偶联 溶剂介导的偶联对溶剂的依赖性 性质和对施主-桥-受主电子对称性的影响， 溶剂和键介导的耦合之间的干扰， 溶剂介导的电子耦合与三重态能量的相关性 转移 电子从一个分子转移到另一个分子的反应。 另一种形式的基础上，广泛的重要化学和 生物过程，包括光合捕获和 植物对阳光能量的利用。 的支持下 有机动力学计划和多学科活动办公室 数学和物理科学理事会的马修教授 B。布朗大学化学系的齐姆特研究了 影响电子从一个电子转移的化学因素 分子到另一个。 通过构建分子， 具有明确取向的电子的供体和受体 和间距相对于另一个，教授Zimmt研究 介入溶剂分子在介导电子转移中的作用 过程 这些模型研究揭示了 控制生物电子转移反应，并具有额外的 与分子尺度的设计和建造等领域的相关性 电子设备。

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.