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极谱法测定铕(Ⅲ)与有机磷酸、丝氨酸和半胱氨酸三元配合物的稳定常数
Polarographic study of mixed complexes of Eu3+ and organic phosphoric acids,Ser and Cys
【摘要】 用极谱法研究了铕与有机磷酸 (P)、丝氨酸 (Ser)、半胱氨酸 (Cys)等形成的二元体系Eu3 + P、Eu3 + Ser、Eu3 + Cys和三元体系Eu3 + P Ser、Eu3 + P Cys.考察了各种配合物形成的条件、电化学性质 ,测定了配合物的组成及其稳定常数 .结果发现 ,其稳定常数随有机磷酸烷基取代基的增大而减小 .
【Abstract】 The mixed complexes of rare earth ion(Eu 3+ )with organic phosphoric acids,Ser,Cys have been investigated by D C.polarographic method.The reduction of Eu 3+ complexes is quasi reversible and diffusion controlled at I =0 1(NaNO 3), T =298?K.The stability constants of binary and ternary complexes were determined.The relations among stability constants and various ligands have also discussed.
【关键词】 铕(Ⅲ);
三元配合物;
极谱法;
稳定常数;
【Key words】 Eu 3+; ternary complexes; polarography; stability constant;
【Key words】 Eu 3+; ternary complexes; polarography; stability constant;
【基金】 甘肃省自然科学基金资助项目!(ZR 97 0 0 5)
- 【文献出处】 西北师范大学学报(自然科学版) ,JOURNAL OF NORTHWEST NORMAL UNIVERSITY(NATURAL SCIENCE EDITION) , 编辑部邮箱 ,2000年04期
- 【分类号】O614
- 【被引频次】3
- 【下载频次】121