| 抗磁离子与氨基酸络合的NMR研究 |
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| 引用本文： | 胡皆汉,许永廷.抗磁离子与氨基酸络合的NMR研究[J].波谱学杂志,1994,11(1):49-55. |
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| 作者姓名： | 胡皆汉 许永廷 |
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| 作者单位： | 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 |
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| 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。
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| 关 键 词： | 抗磁离子 氨基酸 NMR |
| 收稿时间： | 1993-02-01 |
THE NMR STUDIES ON DIAMAGNETIC IONS COORDINATED TO SOME AMINO ACIDS |
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| Hu Jiehan,Qu Ming,Han Xiuwen,Xu Yongting,Yang Kaihai.THE NMR STUDIES ON DIAMAGNETIC IONS COORDINATED TO SOME AMINO ACIDS[J].Chinese Journal of Magnetic Resonance,1994,11(1):49-55. |
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| Authors: | Hu Jiehan Qu Ming Han Xiuwen Xu Yongting Yang Kaihai |
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| Institution: | 1. Dalian Institude of Chemical Physics, The Chinese Academy Sciences, Dalian 116023;2. Experimental Center, Liaoning Normal University, Dalian 116022 |
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| 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. |
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| Keywords: | Diamagnetic ions Amino acid NMR |
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