铕-2-羟基喹啉-4-羧酸配合物的合成及光谱性能  

Synthesis and spectra properties of europium complexes with 2-hydroxyquinoline-4-carboxylic acid

作　　者：朱乾华[1] 万帮江[1] 杨琼[1] 黄辉胜[1] 

机构地区：[1]无机特种功能材料重庆市重点实验室长江师范学院化学化工学院, 重庆408100

出　　处：《原子与分子物理学报》2014年第4期550-554,共5页Journal of Atomic and Molecular Physics

基　　金：重庆市自然科学基金项目(cstc2013jcyjA50038);重庆市教委科学技术研究项目(KJ131313)

摘　　要：以Eu3+为中心离子,2-羟基喹啉-4-羧酸(H2hqc)、1,10-菲罗啉(Phen)和三苯基氧磷(TPPO)为配体,合成了新型配合Eu(Hhqc)3(H2O)、Eu(Hhqc)3Phen(H2O)5和Eu(Hhqc)3TPPO(H2O)5.用元素分析和红外光谱对配合物进行了表征,IR表明配合物Eu(Hhqc)3Phen(H2O)5的Δν值大于钠盐Δν值,配合物中羧酸根以单齿方式配位.而配合物Eu(Hhqc)3(H2O)和Eu(Hhqc)3TPPO(H2O)5Δν值均小于钠盐的Δν值,表明配合物中羧酸根与Eu3+呈螯合双齿配位方式.室温下测定了配合物的荧光光谱,研究了它们的荧光性能.结果表明,配合物均在581,594,615,654和703nm附近产生五条谱带,为Eu3+的特征发射,归属为5 D0→7 FJ(J=0,1,2,3,4)能级间的跃迁,第二配体Phen和TPPO的引入对Eu3+的荧光发射有明显增强作用,且Phen效果更好.Three novel europium complexes,Eu （Hhqc）3 （H2O）,Eu （Hhqc）3Phen （H2O）5 and Eu （Hhqc）3TPPO（H2O）5 were synthesized using 2-Hydroxyquinoline-4-carboxylic acid（H2hqc）,1,10-phenanthroline （Phen）and triphenyl phosphine oxide （TPPO）as the ligands.The complexes were char-acterized by elemental analysis and infrared spectrum.The IR spectra indicated that the complex Eu （Hhqc）3 Phen（H2 O）5 has a largerΔνthan that of NaHhqc,and carboxylate ions in the phenylglyoxyate are coordinated as monodentate ligands.TheΔνvalues of the Eu（Hhqc）3 （H2 O）and Eu（Hhqc）3 TPPO-（H2 O）5 are smaller than that of NaHhqc,the carboxylate ions coordinate to Eu3＋ with bidentate che-lating mode.The fluorescence properties of the complexes were studied at room temperature.Each com-plex shows five emission bands at 581,594,615,654 and 703nm,which are assigned to the characteris-tic emission 5D0→7FJ（J=0,1,2,3,4）transitions of Eu3＋,respectively.The fluorescence intensity becomes stronger after the additions of Phen and TPPO,and Phen is better.

关 键 词：配合物 铕 2-羟基喹啉-4-羧酸 荧光光谱 

分 类 号：O485[理学—固体物理]