应用化学 ›› 1990, Vol. 0 ›› Issue (3): 10-13.

• 研究论文 • 上一篇    下一篇

稀土元素-氨三乙酸-氨基酸混配型配合物的研究

高峰, 牛春吉, 倪嘉缵   

  1. 中国科学院长春应用化学研究所 长春 130022
  • 收稿日期:1989-07-06 修回日期:1989-10-25 出版日期:1990-06-10 发布日期:1990-06-10
  • 基金资助:
    国家自然科学基金

STUDY ON MIXED LIGAND COMPLEXES OF RARE EARTH WITH NITRILOTRIACETIC ACID AND AMINO ACID

Gao Feng, Niu Chunji, Ni Jiazuan   

  1. Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022
  • Received:1989-07-06 Revised:1989-10-25 Published:1990-06-10 Online:1990-06-10

摘要: 为探索多元体系中稀土离子与氨基酸的配位作用,本文在25℃和0.15mol/dm3(NPCl)离子强度条件下,用pH电位法测定了稀土—氨三乙酸分别与蛋氨酸、丝氨酸生成混配型配合物的稳定常数。讨论了上述混配型配合物稳定常数随稀土原子序数的变化规律以及钇的位置。

关键词: 稀土, 氨三乙酸, 氨基酸, 混配型配合物

Abstract: The stability constants for mixed ligand complexes of rare earth with nitrilotriacetic acidas primary ligand and amino acid as secondary ligand have been determined by potentiometrictitration at 25℃ and an ionic strength of 0.15mol/dm3(NaCl). A discussion on the relation-.ship between the stability constants for the mixed ligand complexes and the atomic numberof rare earth has been made. It was found that the position of Y in the ternary systemshifted to the vicinity of neodymium.

Key words: Rare earth, amino acid, nitrilotriacetic acid, mixed ligand complexes