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化学学报
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化学学报 ›› 1998, Vol. 56 ›› Issue (9): 892-899. 上一篇    下一篇

研究论文

Eu^3^+离子与α-氨基酸配合物与介质酸度关系的 ^1^3C NMR研究

陈建设;鲁桂;魏丹毅;姚克敏;沈联芳   

  1. 浙江大学化学系.杭州(310027);中国科学院武汉物理与数学研究所;波谱与原 子分子物理国家重点实验室;宁波师范学院
  • 发布日期:1998-09-15

Studies on the acidity properties of Eu(Ⅲ) complexes with α-amino acids by ^1^3C NMR

Chen Jianshe;Lu Gui;Wei Danyi;Yao Kemin;Shen Lianfang   

  1. Zhejiang Univ, Dept Chem.Hangzhou(310027)
  • Published:1998-09-15

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本文对Eu^3^+离子与α-氨基丙酸及组氨酸配合物体系在不同酸度条件下所表现出的^1^3CNMR波谱进行了研究,发现配合物的^1^3CNMR化学位移值随介质酸度的不同而发生规律性变化,认为这是由于不同的酸度促使配合物的结构形式产生变化所致。对长期有争议的α-氨基参与配位的酸度条件作了讨论,指出α-氨基在微酸性条件下配位的可能性,并通过计算予以进一步证实。

关键词: 碳13核磁共振谱法, 铕离子, 氨基酸, 络合物, 介质, 酸度, 化学位移, 波谱分析, 结构形式, 配位

The ^1^3C NMR spectra of Eu(Ⅲ) complexes with alanine and histidine were investigated respectively. An interesting regularity of ^1^3C NMR shifts was revealed. The relationship between the structure of the obtained complexes and pH condition was discussed indetail. It was pointed out that the variations in ^1^3C NMR shifts were resulted from the change of the complex structure. The possibility of coordination through the nitrogen in α-amino group under a weak acidic condition was also discussed. In addition, a calculation gave a further support to this view point.

Key words: C13 NMR SPECTROMETRY, EUROPIUM ION, AMINO ACID, COMPLEX COMPOUNDS, MEDIA, ACIDITY, CHEMICAL SHIFT, SPECTROMETRIC ANALYSIS, STRUCTURAL FORM, COORDINATION

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