INTRAMOLECULAR ELECTRON TRANSFER IN PORPHYRIN DIMERS, TIMERS AND PENTAMERS

这个子项目是许多研究子项目中的一个 由NIH/NCRR资助的中心赠款提供的资源。子项目及 研究者（PI）可能从另一个NIH来源获得了主要资金， 因此可以在其他CRISP条目中表示。所列机构为 研究中心，而研究中心不一定是研究者所在的机构。 在电子转移过程中供体和受体之间的电子耦合的性质是确定反应速率和产率的重要考虑因素。 可能的是，供体和受体之间的物理耦合也在这样的系统中的电子耦合中发挥相关的作用。 为了研究物理耦合对电子耦合的影响，因此电子转移速率常数，我们正在研究电子转移反应的驱动力基本保持不变，但电子转移伙伴之间的物理耦合不同的化合物。 具体地说，我们已经合成了一系列的金属卟啉系统，其中包括一个电子给体和受体对连接的一系列苯环间隔要么共价连接到卟啉环或协调轴向的卟啉环中所含的金属。

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.