氯化铒与氨基酸配合物的稳定性研究  

Study on the Stability of Erbium Chloride Complexes with Amino-Acid

作　　者：陈芳[1] 胡珍珠[1] 

机构地区：[1]湖北师范学院化学与环境工程系,湖北黄石435002

出　　处：《河南科学》2007年第3期389-390,共2页Henan Science

基　　金：湖北省教育厅重点科研项目(2004D005)

摘　　要：用分光光度法测定了稀土铒盐与甘氨酸(Gly,)组氨酸(L-His,)脯氨酸(L-Pro)形成配合物的组成及平衡常数,从而研究了稀土氨基酸配合物的稳定性,并用DFT-B3LYP方法和6-31G(d,p)基组计算了氨基酸中相关原子的净电荷,结果表明,配合物的稳定性主要受配体空间位阻的影响.The compositions and the equilibrium constant of three amino-acid complexes were determined by spectrometric methods, and the equilibrium constants of reactions appear in the order KGly〉KHis〉KPro in H2O. The net charge at oxygen atom of amino-acid molecules was calculated by using DFT method at B3LYP/6-31G （d, p） level and the fully-optimized molecular. Experimental data and theoretical discussion showed that the stability of complex depends on steric hindrance of amino-acid molecules.

关 键 词：氯化铒 氨基酸 配合物 稳定性 

分 类 号：O614.33[理学—无机化学] O629.7[理学—化学]