铒(Ⅲ)-谷氨酸-邻菲啰啉三元配合物的合成及其电化学活性

The synthesis and electrochemical activity of Er(Ⅲ)-L-glutamic-1,10-phenanthroline ternary complex

在乙醇介质60℃水浴加热的条件下,合成了铒(Er)-谷氨酸(L-Glu)-邻菲啰啉(Phen.H2O)三元稀土配合物,并利用摩尔电导、络合滴定分析、红外光谱(IR)、热重-差热(TG-DTG)等测试分析,测定配合物的化学组成为:[Er(Ш)(Glu)2Phen]Cl3.2H2O.通过循环伏安测定了配合物在铂盘工作电极上的电化学行为,在HAc-NaAc缓冲溶液(pH≈6.0)中配合物{[Er(Glu)2Phen]Cl3.2H2O}和ErCl3.6H2O在-0.3V～-1.0V(νs.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Er3+,该配合物为准可逆体系。在扫描速率:0.05V/s～0.2V/s范围内,配合物的还原峰电流与扫描速率呈现递增关系。

In ethanol medium,one solid ternary complex of Rare earth（Er） and glutamic acid（L-Glu） and 1,10-phenanthroline（Phen·H2O） was synthesized at 60℃,and use of molar conductance,complexometric titration analysis,infrared spectra（IR）,TG-DTG analysis test to determine the complex chemical composition： [Er（Ш）（Glu）2Phen]Cl3·2H2O.Determined complex electrochemical behavior by cyclic voltammetry at a platinum working electrode,complex {[Er（Glu）2Phen]Cl3·2H2O} and ErCl3.6H2O have shown the electrochemical activity at-0.3V ^-1.0V（νs.SCE） in the HAc-NaAc buffer solution（pH≈6.0）.The electrochemical active center is Er3＋ in rare earth complex.The results showed the complex was a quasi-reversible system,and it shows the increasingly relationship of the reduction peak current of complex with scan rate at（0.05V/s ~ 0.20V/s）.