摘要
以邻氨基苯甲酸、2,2′-联吡啶为配体,与氯化铕、氯化钇在水-乙醇混合溶液中反应合成了邻氨基苯甲酸-2,2′-联吡啶-铕钇异多核稀土配合物,测定了配合物的紫外吸收光谱与红外光谱.通过元素分析及等离子体发射光谱对配合物的化学组成进行了分析,在345 nm紫外光激发下,测定了配合物的荧光光谱,并探讨了荧光增敏机理.红外光谱数据表明:邻氨基苯甲酸中的羧基和氨基均与稀土离子配位,联吡啶中的氮也与稀土离子配位.由元素分析数据推测,配合物的化学组成式为(EuxY1-x)L3L′(其中L为配体邻氨基苯甲酸,L′为另一配体2,2′-联吡啶).荧光光谱测定结果表明:不发光的Y3+对Eu3+的发光有明显的增敏作用,且当钇的含量为50%时(摩尔含量),增敏作用最强.
A series of mixed rare earth complexes of europium and yttrium with anthranilic acid and 2,2′- dipyridyl were synthesized by the reaction of EuCl3 and YCl3 with anthranilic acid and 2,2′-dipyridyl in aqueous solution. The UV spectra and infrared spectra of complexes were measured, their compositions were determined via elemental analysis and plasma emission spectrum methods, and their fluorescence spectra were determined. The experiment results show that the chemical bonds have been formed between two ligands and rare earth ions, and the chemical structure of the mixed complex is （EuxY1-x） L3L′, in which L is ligand anthranilic acid, and L′ is another ligand 2,2′-dipyridyl. The fluorescence spectra of the complexes are the characteristic emissions of Eu^3＋, the fluorescence intensities of the complexes are enhanced obviously by doping with Y^3＋, and the increasing effect is maximum as the ratio of the amount （mole） of Eu^3＋to Y^3＋is 1 ： 1.
出处
《中北大学学报（自然科学版）》
CAS
2008年第4期347-351,共5页
Journal of North University of China(Natural Science Edition)
基金
山西省自然科学基金资助项目(20020402)
关键词
铕
钇
邻氨基苯甲酸
2
2′-联吡啶
配合物
荧光光谱
europium
yttrium
anthranilic acid
2,2′-dipyridyl
complexes
fluorescence spectra
