波谱学杂志 ›› 1994, Vol. 11 ›› Issue (1): 49-55.

• 研究论文 • 上一篇    下一篇

抗磁离子与氨基酸络合的NMR研究

胡皆汉1, 屈铭1, 韩秀文1, 许永廷2, 杨开海2   

  1. 1. 中国科学院大连化学物理研究所, 大连 116023;
    2. 辽宁师范大学实验中心, 大连 116022
  • 收稿日期:1993-02-01 修回日期:1993-06-14 出版日期:1994-03-05 发布日期:2018-01-20

THE NMR STUDIES ON DIAMAGNETIC IONS COORDINATED TO SOME AMINO ACIDS

Hu Jiehan1, Qu Ming1, Han Xiuwen1, Xu Yongting2, Yang Kaihai2   

  1. 1. Dalian Institude of Chemical Physics, The Chinese Academy Sciences, Dalian 116023;
    2. Experimental Center, Liaoning Normal University, Dalian 116022
  • Received:1993-02-01 Revised:1993-06-14 Online:1994-03-05 Published:2018-01-20

摘要: 用NMR测T1法研究了Fe3+存在条件下,抗磁离子Zn2+、Cd2+、与丙氨酸的络合情况。顺磁离子使配体碳原子的纵向弛豫时间T1明显缩短。加入抗磁离子后,由于配体竞争并将Fe3+置换下来,而大大加长T1时间,根据弛豫时间的变化便可判断几种抗磁离子的相对络合能力。本文引入一个物理参数来表征抗磁离子的络合能力。

关键词: 抗磁离子, 氨基酸, NMR

Abstract: The coordinations of diamagnetic ions, Zn2+ and Cd2+ with alanine in the present of Fe3+ ions,have been investigated by means of NMR T1 method. The Fe3+ ions make T1 values of Carbons of ligand obviously decreased. After addition of diamagnetic ions,T1 values are increased due to the competition of coordination and the replaeements of Fe3+ ions by diamagnetic ions.The relative coordinating ability of those diamagnetic ions can be elucidated according to the variation of T1 values.Here a new parameter △ is introduced to represent the coordinating ability of diamagnetic ions.

Key words: Diamagnetic ions, Amino acid, NMR