系列巯基苯基卟啉自组装膜的光谱和电化学性质

Spectroscopic and Electrochemical Properties of a Series of Thiol-derivated Porphyrins Self-Assembled Monolayers

考察了系列巯基苯基卟啉自组装膜的光谱及电化学特征。结果表明,与溶液中巯基苯基卟啉的光谱相比,自组装膜中卟啉分子的吸收和荧光光谱均发生了明显变化,随着卟啉分子中巯基数目的增加,其荧光峰依次发生红移;不同巯基苯基卟啉自组装膜修饰电极对电解液中电对的电子转移阻碍能力不同,由5,10-二[4-(3-巯基丙氧基)-苯基]-15,20二苯基卟啉形成的卟啉自组装膜的阻碍作用最强,膜表面覆盖度最致密。

The spectroscopic and electrochemical properties of a series of thiol-porphyrin self-assembled monolayers（SAMs） were studied.The results show that the absorption and fluorescent spectra of the SAMs changed dramatically in comparison with their corresponding precursors in the solution.With the number of thiol in porphyrin increases,the fluorescent peak of the SAMs tends to red shift.Among them,the impede ability to electron transfer in electrolyte are different.The highest block ability and coverage are observed for 5,10-bis（4-hydroxyphenyl）-15,20-bisphenyl porphyrin（cis-TPP（SH）2） SAMs.