稀土(铕、铽)配合物中荧光性能相互影响  

Interaction of Fluorescence Property of Complexes of Rare Earth(Eu-Tb)

作　　者：陈仲清[1] 郭栋才[1] 夏良树[2] 

机构地区：[1]湖南大学化学化工学院,长沙410082 [2]南华大学化学化工学院

出　　处：《应用化学》2007年第10期1157-1161,共5页Chinese Journal of Applied Chemistry

基　　金：湖南省自然科学基金(05JJ30020);湖南省科技厅科技开发基金(04GK3035)资助项目

摘　　要：以5-磺基水杨酸、α-噻吩甲酰三氟丙酮为小分子配体,以溶液聚合制备的甲基丙烯酸甲酯和丙烯酸共聚物(PMMA-AA)为高分子配体,合成了一系列铕、铽的高分子配合物,并通过UV、IR和元素分析对其结构进行了表征。用荧光分光光度计研究了它们的荧光性能及铕、铽之间的荧光性能的互相影响规律,讨论了它们的荧光发射峰位、荧光发射强度与组成的关系。实验结果表明,在稀土(铕、铽)多核高分子荧光配合物中,Eu3+与Tb3+之间的荧光光谱有相互敏化或猝灭的作用。其中Eu3+对Tb3+的荧光有很强的荧光猝灭作用,且在n(Eu3+)∶n(Tb3+)=1∶1时,Eu3+对Tb3+的荧光猝灭作用最大;Tb3+在低浓度n(Eu3+)∶n(Tb3+)大于1∶1时,Tb3+对Eu3+的荧光有猝灭作用,Tb3+在高浓度n(Eu3+)∶n(Tb3+)小于1∶1时,Tb3+对Eu3+的荧光有很强的敏化作用。A series of polymer complexes of Eu-Tb with α-thenoyltrifluoroacetone （HTFA） and 5-sulfoalieylic acid（ SSAH2 ） as micro molecule ligand and copolymer of acrylic acid and methylmethacrylate as polymer ligand was synthesized. The complexes were characterized by means of elemental analysis, ultraviolet and infrared spectroscopies. Their fluorescence properties and the mutual effect on the fluorescence properties of europium and terbium were investigated via the fluorescence spectroscopy. The fluorescent emission peak location and the relationships between the fluorescent emission intensity and composition were also discussed. The results show that the fluorescent intensity has a sensitize or quench effect between Eu^3＋ and Tb^3＋ in the rare-earth（Eu, Tb） polynuclear polymer fluorescence complexes. Eu^3＋ ions shows a strong luminescence quenching effect on Tb^3＋ ions, and this effect is the strongest when the n （ Eu^3＋ ） ： n （ Tb^3 ＋ ） is 1 ： 1. When Tb^3＋ ion concentration is low （n（ Eu^3＋ ） ：n（Tb^3＋ ） is greater than 1：1 ）, Tb^3＋ ions exhibit a luminescence quenching effect on Eu^3 ＋ ions ; when Tb^3 ＋ ion concentration is high （ n （ Eu^3 ＋ ） ： n （ Tb3 ＋ ） is less than 1 ： 1 ）, Tb^3＋ ions display a very strong sensitization effect on Eu^3＋ ions.

关 键 词：稀土 高分子 配合物 合成 荧光性能 

分 类 号：O616[理学—无机化学]