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化学学报
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化学学报 ›› 1987, Vol. 45 ›› Issue (9): 910-912. 上一篇    下一篇

研究论文

重水溶液中稀土-吡啶-2,6-二羧酸配合物的第二配位圈^1HNMR顺磁位移

毛希安;沈联芳;高原;倪嘉缵   

  1. 中国科学院武汉物理研究所;中国科学院长春应用化学研究所
  • 发布日期:1987-09-15

1H NMR paramagnetic shifts due to the second coordination sphere of lanthanide(III)-pyridine-2,6-dicarboxylate complexes in deuterated aqueous solutions

MAO XIAN;SHEN LIANFANG;GAO YUAN;NI JIAZUAN   

  • Published:1987-09-15

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对稀土-吡啶-2,6-二羧酸(DPA)配合物Ln(DPA)3进行了NMR研究并观察到了由溶剂分子形成的第二配位圈的顺磁位移效应.

关键词: 吡啶 P, 羧酸, 重水, 质子磁共振谱法, 磁导率, 稀土金属络合物, 化学位移, 配位场理论, 顺磁性

The 1H-NMR paramagnetic shifts due to the 2nd coordination sphere of Ln(DPA)3 (where Ln = La, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb and Lu; and DPA = pyridine-2,6-dicarboxylic acid) in D2O were studied. The phenomena was explained by a pseudo-contact interaction and 4f electron clouds. The shortest distance between the central ion and the 2nd coordination sphere is 3.4 ?

Key words: PYRIDINE P, CARBOXYLIC ACID, HEAVY WATER, PROTON MAGNETIC RESONANCE SPECTROMETRY, MAGNETIC PERMEABILITY, RARE EARTH METAL COMPLEX, CHEMICAL SHIFT, LIGAND FIELD THEORY, PARAMAGNETISM

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