异双Schiff碱及其稀土配合物的合成、机理与波谱  

Synthesis, Mechanism and NMR Spectra of Lanthanide Complexes with an Unsymmetrical Schiff Base

作　　者：姚克敏[1] 周文[1] 鲁桂[1] 沈联芳[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与数学研究所波谱与原子分子物理国家重点实验室,武汉430071

出　　处：《化学学报》2000年第10期1275-1279,共5页Acta Chimica Sinica

基　　金：国家自然科学基金(29671026);浙江省自然科学基金(296062);波谱与原子分子物理国家重点实验室资助项目

摘　　要：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~1H NMR,^(13)C-~1H COSY谱、固体高分辨^(13)C谱等表征,研究了这类不对称Schiff碱的形成机理和配位方式.Owing to two unsymmetrical-NH2 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 13 C - 1 H COSY and their high resolution solid state 13 C 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.

关 键 词：异双Schiff碱 稀土配合物 合成 形成机理 波谱 

分 类 号：O641.4[理学—物理化学]