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化学学报
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化学学报 ›› 1993, Vol. 51 ›› Issue (7): 677-682. 上一篇    下一篇

研究论文

镧系与邻氨基苯甲酸型Schiff碱配合物的合成、表征及催化活性

姚克敏;李冬成;沈联芳;袁汉珍   

  1. 浙江大学化学系;中国科学院波谱与原子分子物理开放实验室
  • 发布日期:1993-07-15

Synthesis and characterization of new lanthanide complexes with N-(2,4-dihydroxybenzalidene)-anthranilic acid and their catalytic activity

YAO KEMIN;LI DONGCHENG;SHEN LIANFANG;YUAN HANZHEN   

  • Published:1993-07-15

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本文合成2,4-二羟基苯甲醛缩邻氨基苯甲酸Schiff碱(H~3L),以改进的合成方法得到此配体与镧系元素形成的九种新配合物.经分析确定其组成[Ln(H~2L)~2NO~3],(Ln=La、Pr、Nd、Sm、Gd、Dy、Ho、Er、Yb.以热重-差执分析、紫外、红外光谱以及核磁共振谱等表征,证明Schiff碱具有稳定的分子内氢键并以三卤形式同镧系离子形成稳定的共轭双六元螯合环.经研究表明,此系列配合物对甲基丙烯酸甲酯的聚合有明显的催化活性.

关键词: 紫外分光光度法, 甲基丙烯酸甲酯, 红外分光光度法, 核磁共振谱法, 苯甲酸 P, 钇络合物, 钬络合物, 热重量分析, 镱络合物, 差热分析

A new Schiff base (H3L) was obtained through the reaction of 2,4-dihydroxybenzaldehyde with anthranilic acid in alcohol [Ln(H2L)2NO3] (Ln = La, Pr, Nd, Sm. Gd, Dy, Ho, Er, Yb), which were not reported previously, were synthesized using an improved method and characterized by elemental anal., molar conductivity, TG-DTA, IR, UV and NMR spectra. The ligand, which acts as tridentate in the complexes, forms a double 6-membered ring structure with Ln(III). These complexs can be used as a new catalyst in the polymerisation of Me methacrylate.

Key words: ULTRAVIOLET SPECTROPHOTOMETRY, METHYLMETHACRYLATE, INFRARED SPECTROPHOTOMETRY, NMR SPECTROMETRY, BENZENECARBOXYLIC ACID P, YTTRIUM COMPLEX, HOLMIUM COMPLEX, THERMOGRAVIMETRY, YTTERBIUM COMPLEX, DIFFERENTIAL THERMAL ANALYSIS

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