邻氨基苯甲酸-联吡啶-混合稀土(Eu、Tb)配合物的荧光研究

Fluorescence Studies on the Complexes of Europium-Terbium-o -Aminobenzoate-2,2'-dipyridyl

:研究用邻氨基苯甲酸铵、2 ,2’-联吡啶与氯化铕、氯化铽在水 -乙醇溶液中反应合成了邻氨基苯甲酸- 2 ,2’-联吡啶 -铕铽异核稀土配合物 ,并测定了配合物的红外光谱。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(Eux Tb1 - x) L3L′(其中 L 为邻氨基苯甲酸 ,L′为 2 ,2’-联吡啶 ) ;在 35 1nm紫外光激发下 ,研究了配合物的荧光光谱 ,结果表明 ,Eu3+的荧光发射被 Tb3+强烈敏化 ,而 Tb3+的荧光发射被

A series of mixed rare earth complexes of europium and terbium with o aminobenzoate and 2,2'-dipyridyl were synthesized by the reaction of EuCl 3 and TbCl 3 with o-aminobenzoate and 2,2'-dipyridyl in solution.Their infrared spectra were investigated.The results show that the chemical bonds have been formed between the two ligands with rare earth ions.The fluorescence spectra excited by 351nm UV-light indicate that the fluorescence intensities of europium ions are sensitized by terbium ions and those of terbium ions are quenched by europium ions,but the emission peak positions are unchanged.