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  

Synthesis and Characterization of New Lanthanide Complexes with N-(2, 4-Dihydroxyhenzalidene)-anthranilic Acid and Their Catalytic Activity

作　　者：姚克敏[1] 李冬成[1] 沈联芳[2] 袁汉珍[2] 

机构地区：[1]浙江大学化学系,杭州310027 [2]中国科学院武汉物理研究所波谱与原子分子物理实验室,武汉430071

出　　处：《化学学报》1993年第7期677-682,共6页Acta Chimica Sinica

基　　金：国家自然科学基金;浙江省自然科学基金

摘　　要：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。经分析确定其组成为[Ln(H_2L)_2NO_3],(Ln=La、Pr、Nd、Sm、Gd、Dy、Ho、Er、Yb)。以热重-差热分析、紫外、红外光谱以及核磁共振谱等表征,证明该Schiff碱具有稳定的分子内氢键并以三齿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。A new Schiff base (H_3L) has been obtained through the reaction of 2, 4-dihydroxybenzaldehyde with anthranilic acid in alcohol. Complexes of this Schiff base with a series of Ln (Ⅲ) (Ln=La, Pr, Nd, Sm, Gd, Dy, Ho, Er, Yb), which have not been reported previously, were synthesized using an improved method. The complexes [Ln(H_2L)_2NO_3] have been characterized by elemental analysis, molar conductivity, TG-DTA, IR-, UV-spectra and NMR measurements. The ligand, which aets as tridentate in the complexes, forms a double six-membered ring structure with Ln (Ⅲ). Experimental results show that these complexes can be used as a new catalyst in the polymerization of methyl methacrylate (MMA).

关 键 词：镧系 配合物 合成 表征 席夫碱 

分 类 号：O614.33[理学—无机化学]