铕、铽-2-噻吩甲酸-2,2′-联吡啶配合物的合成、表征及荧光性质研究  

Synthesis,Characterization and Fluorescence of Eu^(3+),Tb^(3+) Complexes with 2-Thiophencarboxylic Acid and 2,2′-Bipyridine

作　　者：宝金荣[1] 赵永亮[1] 朱晓伟[2] 

机构地区：[1]内蒙古大学化学化工学院,内蒙古呼和浩特010021 [2]内蒙古医学院药学院,内蒙古呼和浩特010058

出　　处：《光谱学与光谱分析》2007年第3期539-542,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(20461002);内蒙古人才基金资助

摘　　要：合成了铕、铽-2-噻吩甲酸的二元配合物和铕、铽-2-噻吩甲酸-2,2′-联吡啶的三元配合物,并对它们进行了元素分析、稀土络合滴定、摩尔电导测定,确定了配合物组成分别为REL3.2H2O及REL3 L′.C2H5OH(RE=Eu,Tb;L=2-噻吩甲酸、L′=2,2′-联吡啶),测定了配体及配合物的IR谱、1H NMR谱及荧光光谱。IR谱和1H NMR谱测定表明,配体2-噻吩甲酸羧基氧、配体邻菲咯啉2个氮原子与稀土离子配位。荧光光谱实验表明,高氯酸铕和高氯酸铽分别与2,2′-联吡啶和2-噻吩甲酸反应形成的三元配合物的荧光明显强于二元配合物。Two binary complexes of Eua- and Tb3- with 2-thiophene carboxylic acid and two ternary complexes of Eu^3＋ and Tb3- with 2-thiophene carboxylic acid（L）-2, 2＇-bipyridine were synthesized. By elemental analysis, rare earth coordination titration, and molar conductivities studies, the compositions of the complexes were suggested as REL3 · 2H2O and REL3L· C2H5OH（RE=Eu, Tb, L=2-thiophene carboxylic acid, L’=2, 2＇-bipyridine） respectively. The ligands and coordination compounds were studied by means of IR spectra, ^1 H NMR and fluorescence excitation and emission spectra. IR spectra and ^1 H NMR studies indicate that 2-thiophene carboxylic acid was bonded with RE（Ⅲ） through oxygen atoms in the carboxyl group, and 2, 2＇-bipyridine ligand was bonded to RE（ Ⅲ ） through nitrogen atoms. The fluoresence spectra showed that the fluorescence emission intensity of ternary complexes was stronger than that of the binary complexes.

关 键 词：铕配合物 铽配合物 2-噻吩甲酸 2 2’-联吡啶 

分 类 号：O614.3[理学—无机化学]