铕(钇)-水杨酸-邻菲啰啉配合物的合成、表征及发光性能

Synthesis、characterization and luminescence properties of Eu(Y) complexes with salicylic acid and o-phenanthroline

以水杨酸(Hsal)和邻菲啰啉(phen)为协同配体,铕钇离子为中心体,合成不同Eu/Y摩尔比的系列三元双核配合物,并通过元素分析、紫外可见光和红外光谱确定配合物的组成.研究配合物的发光性能以及Eu/Y摩尔比的影响.结果表明,配合物的组成为EuxY1-x(sal)3(phen)(x=0.1～1.0).在Eu/Y摩尔比为0.6:0.4时,配合物Eu0.6Y0.4(sal)3(phen)的发光强度最强.在该系列配合物中,不仅配体可以将吸收的能量传递给发光的铕离子,使其发光,而且不发光的钇配合物也可将其吸收的能量通过分子内能量传递给铕离子,增强铕的发光强度.

A series of dinuclear complexes of salicylic acid and o-phenanthroline with different molar ratios of Eu^3＋ to Y^3- have been synthesized. Their composition was EuxY1-x（sal）3（phen）（x=0.1～1.0）. Their UV spectra, IR spectra and fluorescence spectra were studied. The UV absorption of the complexes comes mainly from that of ligands. The fluorescence spectra of the complexes indicate that the fluorescence emision intensity of europium ion was sensitized by yttrium ion in the complexes. These facts show that not only the ligands but also the yttrium complex can transfer the absorbed energy to Eu^3＋ ion in the complexes.