The Thermodynamic Property of Rare Earth Complexes with L-Threonine  

作　　者：张亚飞 牛春吉 倪嘉缵 

机构地区：[1]Changchun Institute of Applied Chemistry,Academia Sinica,Changchun 130022,China

出　　处：《Journal of Rare Earths》1991年第4期263-267,共5页稀土学报（英文版）

基　　金：The Project Supported by NSFC and Lab.of RE Chem.and Phys.

摘　　要：In this paper the stability constants and thermodynamic parameters for complexes of rare earth elements with L-threonine have been measured systematically by potentiometry and calorimetry at 25℃ and ionic strength of 0.15 mol/L(NaCl).The thermodynamic values for protonation of the anion of L-threonine have been obtained.The dependence of stability,enthalpy and entropy change of the complex upon atomic number of cation is investigated,and the coordination of L-threonine to rare earth is also discussed in detail.In this paper the stability constants and thermodynamic parameters for complexes of rare earth elements with L-threonine have been measured systematically by potentiometry and calorimetry at 25℃ and ionic strength of 0.15 mol/L(NaCl).The thermodynamic values for protonation of the anion of L-threonine have been obtained.The dependence of stability,enthalpy and entropy change of the complex upon atomic number of cation is investigated,and the coordination of L-threonine to rare earth is also discussed in detail.

关 键 词：Rare earth complex THREONINE Thermodynamic property 

分 类 号：TF845-55[冶金工程—有色金属冶金]