摘要
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.
出处
《阜阳师范学院学报（自然科学版）》
2016年第2期41-45,共5页
Journal of Fuyang Normal University(Natural Science)
基金
安徽省高校自然科学研究重点项目(KJ2016A550)
阜阳师范学院重大科技成果孵化基金项目(kjfh201606)
安徽省科技攻关计划项目(1301042112)
省级科研机构校级委托专项课题(2014HJJC02)
安徽高校省级自然科学研究一般项目(2015KJ001)资助
关键词
稀土配合物
掺杂
荧光
寿命
绝对量子产率
rare earth complex
doping
fluorescence
lifetime
absolute quantum yield
