化学学报 ›› 2000, Vol. 58 ›› Issue (11): 1398-1402. 上一篇    下一篇

研究论文

稀土与四甘醇醛缩苯丙氨酸Schiff碱配合物的合 成、性能与催化

魏丹毅;鲁桂;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;中国科学 院波谱与原子分子物理国家重点实验室.武汉(430071)
  • 出版日期:2000-11-15 发布日期:2000-11-15

Synthesis, properties and catalytic activity of rare earth complexes with noncyclic polyether-phenylalanine schiff base

Wei Danyi;Lu Gui;Yao Kemin;Shen Lianfang   

  1. Zhejiang Univ, Dept Chem.Hangzhou(310027);.Wuhan(430071)
  • Online:2000-11-15 Published:2000-11-15

合成了直链醚-氨基酸新型Schiff碱(四甘醇醛缩苯丙氨酸Schiff碱)及其与稀土新配合物,[Ln~3L~2(NO~3)~2]·(NO~3)~3·nH~2O(Ln=La,Nd,Sm,n=3;Ln=Gd,Dy,Er,Y,n=5),以元素分析、磁化率、红外光谱、^1HNMR等进行了表征,研究了的配位作用,根据预期设想,见到此类配合物在有机溶剂中的溶解性有明显改善。以EPR波谱探讨了配合物的晶体场强,并计算了晶体场参数。此外,发现在不加助催化剂条件下,此类配合物对MMA(甲基丙烯酸甲酯)聚合有一定的催化效果。

关键词: 席夫碱, 镧络合物, 钕络合物, 钐络合物, 钆络合物, 镝络合物, 铒络合物, 钇络合物, 元素分析, 红外分光光度法

A new Schiff base derived from tetraglycol aldehyde and phenylalanine and its rare earth complexes [Ln~3L~2(NO~3)~2]·(NO~3) ~3·nH~2O(Ln=La,Nd,Sm, n=3; Ln=Gd,Dy,Er,Y, n=5) have been synthesized and characterized by elemental analyses, magnetic susceptibility, IR and ^1H NMR spectroscopy. The solubility of the obtained complexes in organic solvents has been explored and improved apparently. The crystal field strength and its parameters of the Gd(Ⅲ) complex were investigated by EPR spectroscopy. In addition, these complexes display some catalytic activities in the polymerization of methyl methacrylate (MMA) in the absence of any cocatalyst.

Key words: SCHIFF BASE, LANTHANUM COMPLEX, NEODYMIUM COMPLEX, SAMARIUM COMPLEX, GADOLINIUM COMPLEX, DYSPROSIUM COMPLEX, ERBIUM COMPLEX, YTTRIUM COMPLEX, ELEMENTAL ANALYSIS, INFRARED SPECTROPHOTOMETRY

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