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.
基金
The Project Supported by NSFC and Lab.of RE Chem.and Phys.
