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化学学报
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化学学报 ›› 2000, Vol. 58 ›› Issue (10): 1275-1279. 上一篇    下一篇

研究论文

异双Schiff碱及其稀土配合物的合成、机理与波谱

姚克敏;周文;鲁桂;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;中国科学 院波谱与原子分子物理国家重点实验室.武汉(430071)
  • 发布日期:2000-10-15

Synthesis, mechanism and NMR spectra of lanthanide complexes with an unsymmetrical schiff base

Yao Kemin;Zhou Wen;Lu Gui;Shen Lianfang   

  1. Zhejiang Univ, Dept Chem.Hangzhou(310027);.Wuhan(430071)
  • Published:2000-10-15

PDF

545

被引次数

6

利用2,6-二氨基己酸(赖氨酸)具有两端不对称结构的－NH~2基，合成了一端与水杨醛，另一端与2,4-二羟基苯甲醛缩合形成空间结构不对称的异双Schiff碱及其与稀土元素配合物。以元素分析、热分析、摩尔电导、红外光谱、EPR以及^1HNMR，^1^3C-^1HCOSY谱、固体高分辨^1^3C谱等表征，研究了这类不对称Schiff碱的形成机理和配位方式。

关键词: 席夫碱, 赖氨酸, 水杨醛, 元素分析, 红外分光光度法, 质子磁共振谱法, 稀土金属络合物

Owing to two unsymmetrical －NH~2 groups sited on different terminals, L-lysine was used as a reactant for synthesizing a novel unsymmetrical Schiff base with salicylaldehyde on one side and 2,4- dihydroxy benzaldehyde on the other one. Eight new lanthanide complexes with the ligand above were synthesized and characterized by elemental analysis, TG-DTA, molar conductivity, IR and EPR spectra, especially by a 500 MHz NMR spectrometer for 2D ^1^3C-^1H COSY and their high resolution solid state ^1^3C NMR spectra. The synthesis method, formation mechanism, coordination sphere of the complexes have been suggested as well. The results obtained may provide a new promising method for synthesizing the similar unsymmetrical Schiff bases and their complexes.

Key words: SCHIFF BASE, LYSINE, SALICYLIC ALDEHYDE, ELEMENTAL ANALYSIS, INFRARED SPECTROPHOTOMETRY, PROTON MAGNETIC RESONANCE SPECTROMETRY, RARE EARTH METAL COMPLEX

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