中华医学超声杂志

应用化学 ›› 1995, Vol. 0 ›› Issue (3): 9-12.

• 研究论文 • 上一篇    下一篇

稀土与甘氨酰-L-亮氨酸的配位作用

赵淑富, 田在峰, 王增林, 杨魁跃, 牛春吉, 倪喜缵   

  1. 中国科学院长春应用化学研究所稀土化学与物理开放实验室, 长春 130022
  • 收稿日期:1994-08-16 修回日期:1994-11-30 出版日期:1995-06-10 发布日期:1995-06-10
  • 基金资助:
    国家攀登计划和自然科学基金资助课题

Coordination of Rare Earth with Glycyl-L-Leucine

Zhao Shufu, Tian Zaifeng, Wang Zenglin, Yang Kuiyue, Niu Chunji, Ni Jiazuan   

  1. Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022
  • Received:1994-08-16 Revised:1994-11-30 Published:1995-06-10 Online:1995-06-10

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摘要： 用pH电位法测定了生理条件下(37℃,I=0.15mol/L)和25℃,I=0.10mol/L时甘氨酰-L-亮氨酸的质子化常数及其稀土配合物稳定常数,结果表明稀土可与该配体形成1:1配合物,并且配合物稳定性呈现明显"四分组效应".讨论了钇的位置以及肽键对配合物稳定性的影响.

关键词: 稀土配合物, 甘氨酰-L-亮氨酸, pH电位法

Abstract: Protonation constants of the title ligand as well as stability constants of its com-plexes with rare earth elements were determined by pH potentiometric titration in the physio-logical conditions and at 25℃,I=0.10mol/L respectively.The results indicate that the rareearth can form 1:1 coordination compounds with glycyl-L-leucine at the studied range ofpH.There is an obvious "tetrad effect", in the system.Yttrium position and the effect ofpeptide bond on the complex stability were discussed.

Key words: rare earth complex, glycyl-L-leucine, pH potentiometry

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