掺杂卤代苯甲酸、含氮杂环铕配合物的合成、表征及荧光性能研究  

Synthesis,Characterization and Fluorescence Properties of Europium with Halobenzoic Acid and Nitrogen-heterocyclic Complexes

作　　者：李海燕[1] 赵永亮[1] 魏晓燕[1] 周永生[1] 杜燕[1] 李欢欢[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：《稀土》2011年第4期14-18,共5页Chinese Rare Earths

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

摘　　要：分别以对溴苯甲酸和对碘苯甲酸为第一配体、含氮杂环(TPTZ和phen)为第二配体,以单一稀土Eu^(3+)和Eu^(3+)掺杂Gd^(3+)、Y^(3+)为中心合成了12种配合物。对其进行了元素分析、紫外光谱、红外光谱、荧光激发和发射光谱的测定。推测化合物的组成分别为:(1)Eu(P-BrBA)_3(TPTZ)·2H_2O;(2)Eu(P-IBA)_3(TPTZ)·2H_2O;(3)Eu_(0.5)Gd_(0.5)(P-BrBA)_3(TPTZ)·2H_2O;(4)Eu_(0.5)Gd_(0.5)(P-IBA)_3(TPTZ)·2H_2O;(5)Eu_(0.5) Y_(0.5)(P-BrBA)_3(TPTZ)·2H_2O;(6)Eu_(0.5)Y_(0.5)(P-IBA)_3(TPTZ)·2H_2O;(7)Eu(P-BrBA)_3(phen)·2C_2H_5OH;(8)Eu(P-IBA)_3(phen)·2C_2H_5OH;(9)Eu_(0.5)Gd_(0.5)(P-BrBA)_3(phen)·2C_2H_5OH;(10)Eu_(0.5)Gd_(0.5)(P-IBA)_3(phen)·2C_2H_5OH;(11)Eu_(0.5)Y_(0.5)(P-BrBA)_3(phen)·2C_2H_5OH和(12)Eu_(0.5)Y_(0.5)(P-IBA)_3(phen)·2C_2H_5OH。卤代苯甲酸的羧基氧和稀土离子配位,TPTZ和phen的氮原子与稀土离子成键;配合物的形成对配体的共轭π-π~*跃迁影响不大;几种不同的卤代苯甲酸铕配合物的发光强度有所差别,对溴苯甲酸配合物较强,中性配体TPTZ强于phen;掺钆、钇的铕配合物的荧光强度大于纯铕配合物,表明掺杂配合物并非简单配合物的混合,而是有一定混配配合物形成。Solid complexes of RE（ RE = Eu, Gd and Y） with halobenzoic acid and phenanthroline or 2,4,6 - tri（2 - pyr- idyl） -3 -triazine（TPTZ） have been synthesized and characterized in this article. Their elemental analysis, IR spectra and UV spectra were determined, the results indicated that the complexes have the compositions of Eu（P-BrBA）,（TPTZ）·2H2O;（2）Eu（P-IBA）3（TPTZ）·2H2O;（3）Eu0.5Cd0.5（P-BrBA）3（TPTZ）·2H2O;（4）Eu0.5Cd0.5（P-IBA）3（TPTZ）·2H2O;（5）Eu0.5Y0.5（P-BrBA）3（TPTZ）·2H20;（6）Eu0.5Y0.5（P-IBA）3（TPTZ）·2H2O;（7）Eu（P-BrBA）3（phen）·2C2H5OH;（8）Eu（P-IBA）3（phen）·2C2H5OH;（9）Eu0.5Cd0.5（P-BrBA）3（phen）·2C2H5OH;（10）Eu0.5Cd0.5（P-IBA）3（phen）·2C2H5OH;（11）Eu0.5Y0.5（P-BrBA）3（phen）·2C2H5OH and （12）Eu0.5Y015（P-IBA）3（phen）·2C2H5OH.,the rare earth ions coordinated with oxygen atoms of halo -benzoic acid and nitrogen atoms of nitrogen -heteroeyclie （Phen and TPTZ）. The flu- orescence spectra of the complexes were determined at room temperature. The results showed that these complexes can emit characteristic fluorescence of europium ion, and discrepancy of the fluorescent intensities of the complexes is smaller. P - bro- mo- benzoic acid complexes have stronger fluorescent intensities, and when molar ratio of Eu to Y is 5： 5, the complex has the strongest fluorescent intensity. Those of TPTZ complexes are greater than phen complexes, which indicated that the abilities of light absorption and transfer energy of TPTZ are stronger than phen.

关 键 词：卤代苯甲酸 邻菲啰啉 铕配合物 2 4 6-三吡啶基三嗪 

分 类 号：O614.33[理学—无机化学] O482.3[理学—化学]