Synthesis, characterization and enhanced luminescence of terbium complexes with 2-pyrazinecarboxylic acid and butanedioic acid by inert-fluorescent lanthanide ions  

作　　者：孔凯 张海霞 马瑞军 陈英楠 褚海斌 赵永亮 

机构地区：[1]College of Chemistry and Chemical Engineering,Inner Mongolia University

出　　处：《Journal of Rare Earths》2013年第1期32-36,共5页稀土学报（英文版）

基　　金：Project supported by National Natural Science Foundation of China(21161013);Natural Science Foundation of Inner Mongolia(2011MS0202);the Opening Foundation for Significant Fundamental Research of Inner Mongolia(2010KF03);financial supported and from the Inner Mongolia University"211project"innovative training project

摘　　要：Abstract： Ten solid terbium complexes with 2-pyrazinecarboxylic acid （Hpyca） and butanedioic acid （BDAH） were synthesized via coprecipitation method and characterized by elemental, EDTA titration, inductively coupled plasma （ICP）, thermogravim- etry-differential scanning calorimetry （TG-DSC） and infrared （IR） analyses. The results showed that the complexes had the composi- tions of Tb（pyca）（BDA）·2H2O, Tb0.5Y0.5（pyca）（BDA）·2H2O, Tb0.5La0.5（pyca）（BDA）·3H20, Tb0.5Gd0.5（pyca）（BDA）·2H2O, Tb0.7Y0.3（pyca）（BDA）·3HO, Tb0.7Lao.3（pyca）（BDA）-0.5H20, Tb0.TGd0.3（pyea）（BDA）＇H20, Tb0.6Y0.4（pyca）（BDA）·2.5H20, Tb0.6La0.4 （pyca）（BDA）·2.5H2O and Tbo.6Gd0.4（pyca）（BDA）·3H20. IR spectra indicated that the rare earth ions coordinated with the carboxylic oxygen atoms of Hpyca and BDAH. Luminescence spectra showed that the doped La3＋, y3＋ or Gd3＋ ions did not affect the lumines- cence emission peak positions, but remarkably increased the luminescent intensities of terbium complexes. Furthermore, the doped lanthanide complexes showed longer luminescence lifetimes and higher quantum yields than pure terbium complex. The enhanced luminescence efficiencies of Tb3＋ ions in the doped complexes might result from the antenna effect of the two carboxylate ligands as well as the decrease of the self-quench of the Tb3＋ ions induced by the doped lanthanide ions.Abstract： Ten solid terbium complexes with 2-pyrazinecarboxylic acid （Hpyca） and butanedioic acid （BDAH） were synthesized via coprecipitation method and characterized by elemental, EDTA titration, inductively coupled plasma （ICP）, thermogravim- etry-differential scanning calorimetry （TG-DSC） and infrared （IR） analyses. The results showed that the complexes had the composi- tions of Tb（pyca）（BDA）·2H2O, Tb0.5Y0.5（pyca）（BDA）·2H2O, Tb0.5La0.5（pyca）（BDA）·3H20, Tb0.5Gd0.5（pyca）（BDA）·2H2O, Tb0.7Y0.3（pyca）（BDA）·3HO, Tb0.7Lao.3（pyca）（BDA）-0.5H20, Tb0.TGd0.3（pyea）（BDA）＇H20, Tb0.6Y0.4（pyca）（BDA）·2.5H20, Tb0.6La0.4 （pyca）（BDA）·2.5H2O and Tbo.6Gd0.4（pyca）（BDA）·3H20. IR spectra indicated that the rare earth ions coordinated with the carboxylic oxygen atoms of Hpyca and BDAH. Luminescence spectra showed that the doped La3＋, y3＋ or Gd3＋ ions did not affect the lumines- cence emission peak positions, but remarkably increased the luminescent intensities of terbium complexes. Furthermore, the doped lanthanide complexes showed longer luminescence lifetimes and higher quantum yields than pure terbium complex. The enhanced luminescence efficiencies of Tb3＋ ions in the doped complexes might result from the antenna effect of the two carboxylate ligands as well as the decrease of the self-quench of the Tb3＋ ions induced by the doped lanthanide ions.

关 键 词：terbium complex 2-pyrazinecarboxylic acid butanedioic acid DOPING LUMINESCENCE rare earths 

分 类 号：O627[理学—有机化学]