镧系与直链醚-2,4-二羟基苯甲醛席夫碱新配合物的合成及波谱研究  

Studies of Synthesis and Magnetic Resonance of Lanthanide Complexes with Noncyclic Polyether 2,4 dihydroxybenzaldehyde Schiff Base

作　　者：吴静[1] 姚克敏[1] 陈德余[1] 沈联芳[2] 袁汉珍[2] 

机构地区：[1]浙江大学化学系 [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

出　　处：《高等学校化学学报》1998年第8期1211-1213,共3页Chemical Journal of Chinese Universities

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

摘　　要：Ｖｏｇｔｌｅ等［１］发现，直链醚除具有类似冠醚配位各种金属离子的能力外，还弥补了冠醚的不足之处，如易合成、产率高、价廉等．我们曾报道过有关ＥＰＲ工作［２，３］．本文合成了２，４－二羟基苯甲醛缩二甘醇二胺（ＤＨＹＤＡ）与镧系的新配合物，研究了配合物的１...Nine new Ln(Ⅲ) complexes with a Schiff base, 2,4 dihydroxybenzylidene diglycol diamine, [Ln 2(DHYDA) 3(NO 3) 3](NO 3) 3· n H 2O (Ln=La, Pr, Nd, n =5; Ln=Sm, Gd, Tb, Er, Yb, Y, n =6), have been synthesized. Intramolecular H bond in free ligand, the coordination of 2 OH and the uncoordination of 4 OH group in the obtained complexes have been proved by UV, IR spectra especially by 500 MHz 1H and 13 C NMR spectra. The existence of two different structure ligands in the complexes has been suggested as well. One of the ligands acts as a bridge to connect two Ln 3+ . The EPR spectra of the Gd(Ⅲ) complex exhibits the “U” spectrum feature. The crystal field strength, the local symmetry around Gd 3+ in the complex have been discussed. The possible coordination number 10 is suggested tentatively.

关 键 词：镧系 配合物 直链醚 席夫碱 波谱 合成 DHYDA 

分 类 号：O614.33[理学—无机化学] O625.632[理学—化学]