几种稀土氨基酸络合物合成及离解动力学研究  

Syntheses and Dissociation Kinetics of Rare Earth Complexes with Aminoacid

作　　者：李桂枝[1] 刘永明[1] 

机构地区：[1]烟台大学化学院

出　　处：《稀土》1999年第4期4-7,共4页Chinese Rare Earths

摘　　要：本文合成了稀土（ＲＥ＝Ｌａ，Ｐｒ）与甘氨酸（Ｇｌｙ），谷氨酸（Ｇｌｕ）四种络合物及镨与赖氨酸（Ｌｙｓ）的络合物。在模拟生理条件下，测定了络合物的离解动力学方程。实验表明，在ｐＨ＝４时，络合物的离解呈现一级动力学规律，并且镨赖氨酸络合物离解迅速且离解程度较大，谷氨酸络合物离解速度亦较快，甘氨酸络合物则不发生离解。作为络合物中心离子的Ｌａ和Ｐｒ对络合物的离解速度影响较小。稀土甘氨酸络合物较稳定。The solid complexes of rare earth (RE=La,Pr) with glycine,Lglutamic acid and Llysine were prepared.The dissociation kinetics was studied by UV spectra.As the pH=4,first order kinetics mode for the complexes dissociation was shown.The dissociation rate of RE complexes with Llysine was faster than with Lglutamic acid,and the complexes of RE and glycine were undissociated.The remarkable dissociation effects of the lyscomplex were observed and discussed.The RE complexes with glycine are suitable for feed additives as their higher stability.

关 键 词：镧 镨 GLY GLU Lys 稀土 氨基酸 配合物 

分 类 号：O614.331[理学—无机化学] O614.334[理学—化学]