吡啶甲酰三氟丙酮稀土配合物的合成、表征和荧光性能研究  

Studies on Synthesis,Characterization and Fluorescent Property of 4,4,4-Trifluoro-1-(3-Pyridyl)-1,3-Butanedione-Rare Earth Complexes

作　　者：时建伟[1] 索全伶[1] 吕芳[1] 罗吉平[1] 

机构地区：[1]内蒙古工业大学化工学院,内蒙古呼和浩特010051

出　　处：《稀土》2008年第6期21-25,共5页Chinese Rare Earths

基　　金：内蒙古优秀学科带头人项目(20041001);教育部春晖计划合作项目资助(2005-12-26)

摘　　要：以稀土氯化物和吡啶甲酰三氟丙酮(NTA)为原料,在乙醇溶液中合成了四个新的无水二元稀土配合物RE(NTA)3(RE=Sm,Eu,Tb,Dy)。采用元素分析,UV和IR光谱法,推测了稀土配合物的组成和结构。利用TG-DTA方法,分析了稀土配合物的热稳定性。荧光光谱测定结果表明,吡啶甲酰三氟丙酮(NTA)是稀土的良好配体,能强烈敏化Sm(Ⅲ)和Eu(Ⅲ)发光,但与Tb(Ⅲ)和Dy(Ⅲ)的能级匹配性差,只能发射β-二酮配体的荧光。Four new binary rare earth complexes RE（NTA）3（RE = Sm^3＋ ,Eu^3＋ ,Tb^3＋ ,Dy^3＋ ） have been synthesized by the reaction of rare earth chloride（RECl3·6H2O） with 4,4,4 - trifluoro - 1 - （3 - pyridyl） - 1,3 - butanedione（NTA） in alcohol. The compositions and structures of the complexes were characterized by means of elemental analysis, UV - Vis and FTIR. The heat decomposing behaviors of the complexes were determined by TG - DTA. The results of fluorescence properties show that the NTA is a better ligand in the Eu,Sm complexes,which can sensitize rare earth ions Sm^3＋ and Eu^3＋ and effectively promote the fluorescence of Sm^3＋ and Eu^3＋ ,but the Th and Dy complexes only enut the fluorescence of β- diketone ligand.

关 键 词：二元稀土配合物 β-二酮配体 合成与表征 荧光性质 

分 类 号：O614.33[理学—无机化学] O482.3[理学—化学]