邻氨基苯甲酸2,2′-联吡啶铕镧混合稀土配合物的红外及荧光研究

Studies on the Infrared and Fluorescence Spectra of Europium-Lanthanum-o-Aminobenzoate-2,2′-dipyridyl Complexes

用邻氨基苯甲酸和 2 ,2′ 联吡啶与氯化铕和氯化镧在溶液中反应 ,合成了混合稀土配合物。测定了配合物的红外光谱及荧光光谱。结果表明 ,稀土离子均与配体形成配合物 ,在 34 3nm紫外光激发下 ,在一定范围内 ,用不发光的La3 + 离子取代邻氨基苯甲酸 2 ,2′联吡啶铕配合物中的Eu3 + 离子 ,可以提高Eu3 + 离子的特征发光强度 ,而对发射峰位影响不大。本文对发光机理进行了初探。

A series of mixed rare earth complexes of europium and lanthanum with o aminobenzoate and 2,2 dipyridyl were synthesized by the reaction of EuCl 3 and LaCl 3 with o aminobenzoate and 2,2′ dipyridyl in solution.Their infrared and fluorescence spectra were investigated.The results showed that the chemical bonds have been formed between the two ligands with rare earth ions.The fluorescence spectra excited by 343 nm UV light indicated that the emission intensity for europium ions can be greatly enhanced if a part of europium ions in europium complexes were substituted by lanthanum ions.This paper discussed the luminance, mechanism of too.