In order to understand electrontransfer (ET) pathways through bonds and through space, a porphyrin-spacer-benzoquinone molecule, where the spacer is spiro[4.4]nonane and a phenyl group is inserted between the space of the redox pair, was prepared. On the basis of MM2 calculation, the edge-to-edge distances between the phenyl and the porphyrin or quinone rings are in the range of 2.5—4.2 A. Therefore
为了了解通过键和空间的电子转移(ET)途径,制备了卟啉-间隔基-苯醌分子,其中间隔基是螺[4.4]壬烷,并且在氧化还原对的空间之间插入了苯基。根据MM2计算,苯基与卟啉或醌环之间的边距在2.5-4.2 A的范围内。 因此,预计化合物中存在两种可能的分子内ET途径,即,通过债券和通过空间。电荷分离过程的 ET 速率 (kcs) 是基于荧光寿命获得的。上述化合物的kcs值与不存在插入苯环的参考化合物的kcs值几乎相同。所以,得出的结论是,氧化还原对之间插入的 π 系统不用作 ET 途径的垫脚石;换句话说,当前分子中的 ET 是通过键机制发生的。为了与快速 ET 竞争,通过债券...
Synthesis of Rigid Porphyrin-Quinone Compounds for Studying Mutual Orientation Effects on Electron Transfer and Their Photophysical Properties
A series of covalentlylinkedporphyrin-quinonemolecules in which a porphyrin ring is connected at two fixed distances with two different kinds of rigid spacers to benzoquinone were synthesized. The spacer is either spiro[4.4]nonane or trans-decalin. These compounds were designed to have a fixed orientation of different kinds with the same redox pair, the same separation distance, and the same number
In order to understand electron transfer pathways through bond and through space, a covalentlylinkedporphyrin-quinonemolecule with an inserted phenyl ring between the redox pair was prepared. The inserted π-system is not used as a stepping stone in electron-transfer pathways.