掺杂钇的铕稀土配合物的荧光绝对量子产率和寿命的研究（英文）

Study on fluorescence absolute quantum yield and lifetime of europium complexes by doping yttrium

在无水乙醇中,利用Eu3+和Y3+作为中心离子,α-噻吩甲酰三氟丙酮(TTA)和1,10-邻菲啰啉(phen)作为配体制备了一系列共发光稀土配合物Eu_xY_(1-x)(TTA)3phen,并对TTA和Eu_xY_(1-x)(TTA)3phen进行了红外表征。掺杂钇的铕配合物与没掺杂钇相比,荧光绝对量子产率和平均寿命都发生了很大变化,随着钇含量的增大,Eu_xY_(1-x)(TTA)3phen的荧光绝对量子产率先增大,然后减小,而平均寿命则以波动方式逐渐减小,说明钇的掺杂改变了Eu_xY_(1-x)(TTA)3phen的分子微观结构,从而改变了Eu_xY_(1-x)(TTA)3phen的能量传递方式。

A series of Co-luminescence Eu_xY_（1-x）（TTA）_3 phen were synthesized in anhydrous ethanol by using Eu^3＋ and Y^3＋ as central ions and 2-Thenoyltrifluoroacetone（TTA） and 1,10-phenanthroline（phen） as ligands. IR spectra of the ligand TTA and Eu_xY_（1-x）（TTA）_3 phen were determined. The absolute fluorescence quantum yields and average fluorescence lifetimes of europium complexes undergo great change after the europium complexes are doped Y into. With the Y content increasing, the absolute quantum yields of Eu_xY_（1-x）（TTA）3phen first increase and then decrease, and the average fluorescence lifetimes of Eu_xY_（1-x）（TTA）_3 phen become shorter in a wave-like pattern. These results indicate that Y-doped results in intramolecular microstructure change of Eu_xY_（1-x）（TTA）_3 phen, which results in change of intramolecular energy transfer system of Eu_xY_（1-x）（TTA）_3 phen.