铈(Ⅲ)-组氨酸-邻菲啰啉三元配合物的合成及其电化学活性  

Synthesis and electrochemical activity of Ce(Ⅲ) with L-histidine acid and 1,10-phenanthroline ternary complex

作　　者：王卫东[1,2] 包婷婷[1] 李登科[1] 

机构地区：[1]湖北师范学院化学与环境工程学院,湖北黄石435002 [2]湖北师范学院污染物分析与资源化技术湖北省重点实验室,湖北黄石435002

出　　处：《化学试剂》2011年第7期588-591,596,共5页Chemical Reagents

基　　金：湖北省教育厅重点科研项目(D20082202)

摘　　要：在乙醇水溶液介质中,60℃水浴加热的条件下,合成了标题化合物。经络合滴定、摩尔电导、元素分析、红外光谱、紫外光谱、热重-差热和循环伏安等测试对配合物进行了表征,确定配合物的化学组成为:[Ce(Ⅲ)(His)3phen]Cl3·3H2O。重点通过循环伏安测定了配合物在玻碳工作电极上的电化学行为,在HAc-NaAc缓冲溶液(pH约为6.0)中配合物{[Ce(Ⅲ)(His)3phen]Cl3·3H2O}和CeCl3·7H2O在-0.3～-1.0 V(vs.SCE)电位范围内均表现出电化学活性,配合物的电化学活化中心是Ce3+,该配合物为准可逆体系,在扫描速率0.05～0.2 V/s范围内,配合物的还原峰电流与扫描速率的平方根呈现很好的线性关系。In ethanol bath water medium,rare earth complex of Ce（Ш） with L-histidine acid and 1,10-phenanthroline was synthesized at 60 ℃.The chemical composition of [Ce（Ⅲ）（His）3phen]Cl3·3H2O was confirmed via meridian which co-titration of Ce content,then by molar conductance,elemental analysis,infrared spectra（IR）,ultraviolet spectra（UV）,TG-DTG and cyclic voltammetry（CV）.The electrochemical behavior of ternary complex on the glass-carbon working electrode was determined by cyclic voltammetry（CV）.The complex [Ce（Ⅲ）（His）3phen]Cl3·3H2O and CeCl3·7H2O have shown the electrochemical activity at-0.3～-1.0 V（vs.SCE） in the HAc-NaAc buffer solution（pH≈6.0）.The electrochemical active center was Ce3＋ in rare earth complex.The results showed the complex was a quasi-reversible system.The reduction peak current of complex had a good linear relationship with square root of scan rate at 0.05～0.2 V/s.

关 键 词：三元稀土配合物 循环伏安 电化学活性 

分 类 号：O614.33[理学—无机化学]