钆与氨基酸配合物的滴定量热研究  

Study on Complexes of Gd^(3+) with Amino Acids by Titration Calorimeter

作　　者：唐浩[1] 王志勇[1] 余菡 汪存信[1] 

机构地区：[1]武汉大学化学与分子科学学院,湖北武汉430072

出　　处：《武汉大学学报（理学版）》2002年第4期393-396,共4页Journal of Wuhan University:Natural Science Edition

基　　金：国家自然科学基金资助项目 (2 9873 0 3 6)

摘　　要：用滴定量热法测定了稀土钆 (Ⅲ )离子与 8种氨基酸配合物在 2 98.15K下配位反应的热效应 计算了配合物的稳定常数及配位反应热焓 ,并由此推出反应的吉布斯自由能变化和熵变 从而讨论了稀土钆 (Ⅲ )It has been determined that the stability constants and thermodynamic functions for complexes of Gd 3+ with some amino acids by titration calorimeter at 298.15 K.The study of the effect of race earch and amino acid structure on the stability of the complexes has been discussed. The enthalpy change makes a predominant contribution to the stability of these complexes.The increase of R group amino acids resists making complexes.The ring in amino acid associated with Gd 3+ helps to enhance the stability of complexes.

关 键 词：滴定量热法 稀土 氨基酸 配合物 

分 类 号：O642.3[理学—物理化学]