Linked Donor/Acceptor/Photosensitizer Systems

链接的供体/受体/光敏剂系统

• 批准号: 8821752
• 负责人: C. Michael Elliott
• 金额: $ 18.2万
• 依托单位: Colorado State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-03-01 至 1992-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8821752&HistoricalAwards=false
• 关键词: Linked; Donor; Acceptor; Photosensitizer; Systems

This project is in the general field of analytical and surface chemistry and in the subfields of photochemistry and electrochemistry. Chemical synthetic methods will be employed to prepare a wide variety of linked intramolecular electron transfer systems that have unique properties absent in non-linked systems. The complexes are based on trisbipyridine (II) as a light-harvesting photocenter. This photocenter is covalently linked via flexible linkages to N,N'-diquaternary- 2,2'-bipyridinium as an electron acceptor and/or N-alkyl phenothiazine as an electron donor. In other series, triply bridged heterodinuclear ruthenium/rhodium complexes with relatively rigid linkages will be studied. Ground state properties will be characterized by electrochemical, spectroelectrochemical and spectroscopic methods. Electron transfer rates will be determined by time-resolved emission and absorption spectroscopy. Combined electrochemical, photochemical and photophysical studies of linked donor/acceptor photosensitizer systems will lead to a better understanding on the molecular level of light-induced electron transfer systems. The results will aid in the design of more efficient molecular systems for converting light emergy into useful chemical energy.

该项目是在一般领域的分析和表面 化学和光化学的子领域， 电化学 将采用化学合成方法 来制备各种各样的连接的分子内电子 传输系统具有独特的属性， 非链接系统。 配合物是基于三联吡啶 (II)作为集光中心。 这个感光中心是 通过柔性键共价连接至N，N '-二季铵- 作为电子受体的2，2 '-联吡啶鎓和/或N-烷基 吩噻嗪作为电子供体。 在其他系列中， 桥联异双核钌/铑配合物， 将研究相对刚性的连杆。 基态 性能将通过电化学， 光谱电化学和光谱方法。 电子 传输速率将由时间分辨发射决定， 吸收光谱学 电化学、光化学和物理化学相结合 连接的供体/受体光敏剂系统的研究将 从而在分子水平上更好地理解 光诱导电子转移系统。 结果将有助于 设计更有效的分子系统， 将光能转化为有用的化学能。