掺杂金属离子对(Eu,Tb)稀土配合物发光性质的影响  

Influences of Co-doping Metal Ions on Luminescent Properties of(Eu,Tb) Rare Earth Complexes

作　　者：王鹏[1] 魏长平[1] 任晓明[1] 

机构地区：[1]长春理工大学材料科学与工程学院,吉林长春130022

出　　处：《发光学报》2009年第1期97-100,共4页Chinese Journal of Luminescence

基　　金：中国科协"海外智力为国服务行动计划"基金资助项目(200645-0605)

摘　　要：合成了以柠檬酸为第一配体、1,10-菲咯啉为第二配体的单核稀土(Eu、Tb)配合物和Tb/Y、Eu/Y按不同比例混合的掺杂稀土配合物。采用红外光谱、紫外光谱、激发和发射光谱等对合成的配合物结构和荧光性能进行了表征。红外光谱表明稀土离子与第一、第二配体进行了配位,配合物的紫外吸收主要是配体的吸收,保持了π→π*电子跃迁的特征。激发和发射光谱表明,不发光稀土离子Y3+的掺入能显著增强发光稀土离子的光发射强度。In my paper, the rare earth （Eu, Tb ） complexes were synthesized with citric acid as the first ligand and 1,10-phenanthroline （phen） as the secondary ligand, ternary rare earth complexes with a series of different ratios of Eu/Y and Tb/Y were synthesized. The complexes synthesized were characterized by IR spectra, UV spectra and emission-excitation spectra. IR spectra and elemental analysis show that composition and structure of the complexes synthesized is the same as the data in accordance with a chemical formula, the rare earth ions coordinated with the ligands, and the complexes is the target product. From the IR spectrum it can be seen, the C=O bond（1 729 cm^-1） of citric acid symmetric stretching vibration, C-O bond （1 217 cm^-1 ） symmetric stretching and O-H hydrogenous bond formation of hydroxyl plane bending vibration （945 cm^-1 ） disappeared after the formation of complexes. The absorption of the ligand （phen） resulted in the complexe＇ s absorption which holded the character of π→π^＊ transition with the formation of the ligand （phen） having little effect on the transition, Y^3＋ does not produce fluorescence itself, but the fluorescence intensity of the europium（ Ⅲ ） complexes increased with yttrium（Ⅲ） doped. The energy of ligand triplet state was transfered to yttrium （ Ⅲ） difficultly because of the high excitation energy and f^0 structure of yttrium （ Ⅲ）, so that europium（ Ⅲ ） can get more energy, and its fluorescence intensity increased, which is so-called the co-luminescence.

关 键 词：稀土配合物 掺杂 柠檬酸 苯甲酸 1 10-菲咯啉 

分 类 号：O482.31[理学—固体物理] O614.3[理学—物理]