二氟化四苯基卟啉合锗、氢氧化四苯基卟啉合锗电化学和光谱电化学性质的研究

Studies on the Electrochemical and Spectroelectro-Chemical Properties of Difluorogermanium Porphyrin and Dihydroxidegermanium Porphyrin

利用循环伏安和现场紫外光谱电化学方法研究了标题配合物的电化学和光谱电化学性质。结果表明：在ＤＭＦ介质的电位窗口内，卟啉环发生两步可逆的还原反应；与ＴＰＰＧｅＦ２相比，ＴＰＰＧｅ（ＯＨ）２还原的半波电位较负，其紫外光谱吸收峰位置普遍红移；电极反应转移的电子数皆为１；对于ＴＰＰＧｅＦ２，两步还原的标准电极电位分别为－１．２９２Ｖ和－１．８０３Ｖ，对于ＴＰＰＧｅ（ＯＨ）２。分别为－１．４４３Ｖ和－１．８９０Ｖ．

In this paper the electrochemical and spectroelectro-chemical properties of difluorogermanium porphyrin and dihydroxidegermanium porphyrin have been studied by the cyclic voltammetry and in situ UV-visible spectro-electrochemistry. The results have shown:in the potential window of DMF,the porphy rinring may be reduced in two steps that are reversible . The half-wave potentials for TPPGe(OH)2 are more negative than TPPGeF2,and there are a widespread red shift for the UV-Visible spectum. One electron is transferred in all electrode reactions.To TPPEGeF2,the standard,electrode potentials of first and second reduce react.To TPPGeF2,the standard electrode potentials of first and second reduce reaction are -1.292V and -1.803V,to TPPGe(OH)2,-1. 443V and -1.890V respectively