发红色荧光铽配合物的合成及荧光性能的研究  

Synthesis and Fluorescence Properties of Complexes of Terbium with Red Fluorescence

作　　者：杜燕[1] 赵永亮[1] 付晓涛[1] 孙慧娟[1] 李欣[1] 

机构地区：[1]内蒙古大学化学化工学院,内蒙古呼和浩特010021

出　　处：《光谱学与光谱分析》2011年第1期158-161,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(20461002);内蒙古自然科学基金项目(200711020203)资助

摘　　要：以二苯甲酰甲烷(HDBM)为第一配体,邻菲罗啉(phen)和二吡啶并[3,2-a:2′,3′-c]哇喔啉(dpq)为第二配体合成两种三元铽配合物,并进行元素分析、稀土络合滴定、摩尔电导率、红外光谱、紫外光谱、荧光激发和发射光谱的测定,推测化合物的组成分别为:Tb(DBM)3phen,Tb(DBM)3dpq。DBM通过氧原子与Tb(Ⅲ)螯合成键,phen和dpq的氮原子与Tb(Ⅲ)结合;所得配合物的荧光发射峰与普通的铽配合物相比,峰位相似,强度不同,5D4→7F6跃迁(490nm)、5D4→7F5跃迁(545nm)和5D4→7F4跃迁(586nm)很弱,5D4→7F3跃迁(621nm)较强,因而配合物不发其特征的绿光而发红色荧光。文章从配体三重态能级、配合物能级跃迁以及沉淀晶粒聚合状态的角度,对铽配合物发红色荧光的原因进行了讨论。Two terbium complexes were synthesized,with dibenzoylmethane（HDBM） as the first ligand and 1,10-phenanthroline（phen）,dipyrido[3,2-a：2＇,3＇-c] quinoxaline as the second ligand.The studies of elemental analysis,rare earth complexometric titration,molar conduction,IR spectra,UV spectra,fluorescence excitation and emission spectra indicate that the complexes have the compositions of Tb（DBM）3phen and Tb（DBM）3dpq.The results show that the rare earth ion（Tb3＋） was bonded with the carbonyl oxygen atom of DBM and nitrogen atoms of phen and dpq.For the terbium complexes prepared by precipitation,the peak positions of the transitions were similar with the ones of the common complexes.The peaks at 490,545,586 and 621 nm were assigned to the 5D4→7F6,5D4→7F6,5D4→7F6,5D4→7F6 transitions.For the fluorescence intensities of their 5D4→7F6,5D4→7F5 and 5D4→7F4 transitions were lower than that of the 5D4→7F3 transition,the terbium complexes did not exhibite the characteristic fluorescence（green）,but strong red fluorescence.The reason why terbium complexes exhibit the red fluorescence was investigated in the paper by studying the triplet state of ligands,the energy level transitions of complexes and the aggregation state of particles.

关 键 词：铽配合物 红色荧光 二苯甲酰甲烷 邻菲罗啉 

分 类 号：O644.1[理学—物理化学]