Study of complexes of lanthanum with amino acids by titration calorimeter |
| |
Authors: | Ye Gang Wang Cun-xin Qu Song-sheng |
| |
Institution: | (1) College of Chemistry and Environment Science, Wuhan University, 430072 Wuhan, China |
| |
Abstract: | The stability constants and thermodynamic functions for complexes of lanthanum with eight kind of amino acids according to
1∶1 and 1∶2 in proportion have been determined by titration calorimeter at 298.15 K. The enthalpy change makes a predominant
contribution to the stability of these complexes. The ring in amino acid associated with lanthanum ion helps to enhance the
stability of complexes. Steric effects between rings in complexes leads to that the equilibrium constants of reaction of the
complexes (1∶2) is much less than that of the complexes (1∶1).
Foundation item: Supported by the National Nature Science Foundation of China (29873036)
Biography: Ye Gang (1974-), male, M S., research direction: thermochemistry. |
| |
Keywords: | titration calorimeter rare earth amino acid complexes steric effects |
本文献已被 万方数据 SpringerLink 等数据库收录! |