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作 者:王卫东[1,2] 陈亮林[1] 陈灵[1] 陆江林[1] 胡茂林[3]
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 [3]温州大学化学与材料科学学院,浙江温州325027
出 处:《中国稀土学报》2010年第1期115-119,共5页Journal of the Chinese Society of Rare Earths
基 金:国家自然科学基金项目(20571057);湖北省教育厅重点科研项目(D20082202);湖北师范学院应用研究项目资助
摘 要:在乙醇介质60℃水浴加热的条件下,合成了铕(Ⅲ)-5-氟尿嘧啶-1-基乙酸(5-Fu-1-yl)-L-丝氨酸(L-ser)三元固体稀土配合物,对其进行了元素分析、络合滴定、摩尔电导、紫外光谱、红外光谱、荧光光谱和循环伏安等性质的测试,确定其化学组成为[Eu(Ⅲ)(5-Fu-1-yl)(L-ser)]C l3.2H2O,重点通过循环伏安测定此配合物在碳糊工作电极上的电化学行为,在HAc-NaAc缓冲溶液(pH≈6.5)中,[Eu(5-Fu-1-yl)(L-ser)]C l3.2H2O和EuC l3在(-0.2)^(-1.2)V(vs.SCE)电位均表现出电化学活性,稀土配合物的电化学活化中心是Eu3+,且配合物的还原峰电流与浓度和扫描速度的平方根呈现很好的线性关系,说明该体系为标准的可逆体系。In ethanol medium, one solid ternary com plex of Eu ( 111 ) with 5-fluorouracil-l-yl acetic acid and L-serine was synthesized at 60 ℃ and characterized by elemental analysis, EDTA titration, molar conductance, ultraviolet spectra ( UV), infrared spectra (IR) , fluorescence spectra, and cyclic voltamme try(CV). The compositions of the complex were confirmed to be [ Eu ( Ⅲ ) ( 5-Fu-l-yl ) (L-ser) ] Cl3 · 2H2O. The focus was that the electrochemical behavior of ternary complex on the carbon paste working electrode was determined by cyclic voltammetry, and the [ Eu (5-Fu-l-yl) (L-ser) ] Cl3 ·2H2O and EuCl3 had electrochemical activity at - 0. 2 - - 1.2 V ( vs. SCE ) in the HAc-NaAc buffer solution ( pH ≈ 6.5 ). The electrochemical active center was Eu^3+ in rare earth complex. And there was a good liner relationship be- tween the reduction peak current of complex and concentration and square root of scan rate. The results showed that the system was a standard reversible system.
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