INTRAMOLECULAR ELECTRON TRANSFER IN PORPHYRIN DIMERS, TIMERS AND PENTAMERS

卟啉二聚体、定时器和五聚体中的分子内电子转移

• 批准号: 7373148
• 负责人: MICHAEL J THERIEN
• 金额: $ 0.68万
• 依托单位: UNIVERSITY OF PENNSYLVANIA
• 依托单位国家: 美国
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-08-01 至 2007-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7373148
• 关键词: INTRAMOLECULAR; ELECTRON; TRANSFER; PORPHYRIN; DIMERS

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. The nature of the electronic coupling between donors and acceptors in electron transfer processes is an important consideration in determining the rates and therefore the yields of such reactions. It is likely that the physical coupling between donors and acceptors also plays a pertinent role in the electronic coupling in such systems. In order to investigate the effect of the physical coupling on the electronic coupling, hence the electron transfer rate constants, we are studying compounds in which the driving force for electron transfer reaction remains essentially constant but the physical coupling between electron transfer partners differs. Specifically, we have synthesized a series of metallo-porphyrin systems which consist of an electron donor and acceptor pair linked by a series of phenyl-ring spacers which are either covalently linked to the porphyrin ring or coordinated axially to the metal contained in the porphyrin ring.

这个子项目是利用由NIH/NCRR资助的中心拨款提供的资源的许多研究子项目之一。子项目和调查员(PI)可能从另一个NIH来源获得了主要资金，因此可能会出现在其他CRISE条目中。列出的机构是针对中心的，而不一定是针对调查员的机构。在电子转移过程中，给体和受体之间的电子耦合的性质是决定这种反应的速率和产率的一个重要考虑因素。在这种体系中，施主和受主之间的物理耦合很可能也在电子耦合中起着重要的作用。为了研究物理耦合对电子耦合的影响，即电子转移速率常数，我们研究了电子转移反应的驱动力基本不变，但电子转移伙伴之间的物理耦合不同的化合物。具体地说，我们合成了一系列金属卟啉体系，它们由一系列苯环间隔物连接的电子给体和受体对组成，这些间隔体要么共价连接到卟啉环上，要么轴向配位到卟啉环中的金属上。