Synthesis and magnetic resonance of new heteropolynuclear Ln(III)-Cu(II) complexes with noncyclic polyether Schiff base

作     者：姚克敏 吴静 沈联芳 袁汉珍 

作者机构：Department of Chemistry Zhejiang University Hangzhou China Department of Chemistry Hangzhou Teachers’ College Hangzhou China Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics & Mathematics Chinese Academy of Sciences Wuhan China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：1998年第41卷第4期

页      面：371-376页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：theNationalNaturalScienceFoundationofChina (GrantNo.2 96 710 2 6 ) theNaturalScienceFoun dationofZhejiangProvince (GrantNo .2 96 0 6 2 ) theLaboratoryofMagneticResonanceandAtomicandMolecularPhysics(GrantNo .9715 0 2 ) WuhanInstituteofPhys 

主　　题：lanthanide noncyclic polyether Schiff base heteropolynuclear complex NMR spectra. 

摘      要：A series of novel heteropolynuclear complexes of Ln(III)\|Cu(II) and Cu(II) complex with noncyclic polyether Schiff base, salicylidene diethylene glycol diamine (SALDA), have been synthesized for the first time. The isolated complexes are formulated as [LnCu\-2(SALDA)\-3(NO\-3)\-5](NO\-3)\-2·4H\-2O (Ln=La, Pr, Nd, Sm, Gd, Tb, Er, Yb, Y) and [Cu(SALDA)(NO\-3)](NO\-3)·H\-2O. Synthesis methods are reported herein. The differences in their compositions, structures and coordination have been investigated by UV, IR, magnetic susceptibility, especially by 1 H and 13 C NMR spectra. It has been found that ν (CN) in the Ln(III)\|Cu(II) complexes are split up into two peaks with a far distance and it may be used as a probe for distinguishing them from others. In addition, it is suggested that the ethereal oxygen donors are not all coordinated. The good catalysis effect for the polymerization of methyl methacrylate (MMA) are reported for the first time. The results show that the catalytic activity of Nd\|Cu\|SALDA complex is better than that of the others and its syndiotactic sequence is ～72% as well, the conversion increases to 88%.