摘要
用循环伏安与现场可见紫外光谱电化学方法研究了氯化4-特丁基苯氧基铁酞菁[(TbPc)Fe(Ⅲ)Cl]电化学行为.结果表明,在四氢呋喃溶剂中其正电位区经历了两步氧化过程,对应于Fe(Ⅲ)/Fe(Ⅳ)以及Fe(Ⅳ)/阳离子自由基的生成反应,负电位区还原过程经历了Fe(Ⅲ)/Fe(Ⅱ),Fe(Ⅱ)/Fe(Ⅰ)和Fe(Ⅰ)/阴离子自由基生成的3个步骤,阐述了配位效应对氧化还原机理的影响.指出Fe(Ⅳ)不寻常价态的出现,是阴离子Cl-的轴向配位对超常价态起到稳定作用的结果.
Cyclic voltammetry and insitu UVVisible spectroelectrochemical behavior of (TbPc)Fe(Ⅲ)Cl, (TbPc)Fe(Ⅲ)ClO4 and (TbPc)Zn(Ⅱ) are reported. Five redox steps of Fe(Ⅳ)/radical cation, Fe(Ⅳ)/Fe(Ⅲ), Fe(Ⅲ)/Fe(Ⅱ), Fe(Ⅱ)/Fe(Ⅰ) and Fe(Ⅰ)/radical anion in THF were observed. The existence of unusual oxidation state of Fe(Ⅳ) is attributed to the axial coordination of Cl- anion. A mechanism for the redox reactions has been proposed.
出处
《应用化学》
CAS
CSCD
北大核心
1998年第2期44-47,共4页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金
关键词
铁酞菁
现场薄层光谱
电化学
酞菁铁
iron phthalocyanine,insitu spectroelectrochemistry