(EUxRE1-x)(FTFA)3Phen配合物的合成、表征及荧光性能  

Synthesis,Characterization and Photoluminescence Properties of (Eu_xRE_(1-x))(FTFA)_3Phen Complexes

作　　者：王连蒙[1] 赵永亮[1,2] 周永生[1] 魏晓燕[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 [2]北京大学稀土材料化学及应用国家重点实验室,北京100871

出　　处：《发光学报》2008年第6期1086-1090,共5页Chinese Journal of Luminescence

基　　金：国家自然科学基金(20461002);教育部春晖计划基金(Z2004-2-15029);内蒙古基金(200711020203)资助项目

摘　　要：在无水乙醇溶液中用氯化稀土与4,4,4-三氟-1-(2-呋喃基)-1,3-丁二酮(FTFA)和邻菲啰啉(Phen)反应,合成了标题配合物;对其进行了元素分析、摩尔电导、红外光谱分析及荧光性能的研究。结果表明其化学组成分别为Eu(FTFA)3Phen、Sm(FTFA)3Phen;(Eu0.5RE0.5)(FTFA)3Phen(RE=Y,La和Gd)及(EuxGd1-x)(FTFA)3Phen(x=0.1,0.3,0.4,0.7,0.9)。配体FTFA通过烯醇式氧负离子与稀土离子双齿螯合配位,Phen的两个氮原子与稀土离子呈环状配位;所有配合物均为非电解质。光谱实验结果表明,铕配合物的荧光发射强度要远大于钐配合物的荧光强度;对于铕系列掺杂配合物来讲,所有激发光谱都为一宽带峰,表明配体能很好的吸收能量;在荧光惰性Gd3+离子的含量0.1<x<0.6时,可以使Eu3+的特征荧光发射得到增强,在实验所设定的条件下当Gd3+离子的含量为0.3时,铕土配合物的荧光发射强度最强。The complexes of samarium, europium and different proportion （ Eu： Gd） with 4,4,4-trifiuoro-1- （2-furyl）-1,3-butanedione and 1,10-phenanthroline were synthesized in anhydrous alcohol solution. The pure or doped solid complexes of Eu （FFFA）3Phen,Sm （FTFA）3Phen and EuxGd1-x （FFFA）3Phen （x = 0.1,0.3,0.4, 0.7,0.9） were characterized by elemental analysis, IR spectra, EDTA titration and molar conductivity. The molar conductivity indicated that all the complexes are nonelectrolyte; IR spectra showed that the ligand coordinate （double-t0oth） with RE^3＋ ions is through the oxygen negative ion of enolie form of FTFA and the two nitrogen atoms of 1, 10-phenanthroline. The fluorescence properties of these complexes were studied in this article, the excitation spectra showed that energy absorb is higher for the ligands and the energy transfer is efficient from the ligands to the RE^3＋. The fluorescence emission intensity of Eu （FTFA）3 Phen is much higher than that of Sm（FTFA） 3 Phen at the fixed experimental condition. It showed that the triplet state energy of the two ligands are higher than the excitation energy of Eu^3＋ ion, thus it is possible that energy transfers from 4, 4,4-trifluoro-1-（2-furyl）-1 ,3-butanedione and o-phenanthroline to Eu^3＋ through -COO-Eu-OOC- and-N-Eu- N- bonds are more efficient. Fluorescence emission intensity of ^5D0→^7F2 transitions is the strongest among the emission spectra of the europium ion complexes, so we choose this energy transition as the research object. The results showed that the emission intensity of Eu^3＋ ion can be enhanced when Eu^3 ＋ ion is substituted by Gd^3＋ ion. But the mole fraction of Gd^3＋ ion influence on the fluorescence emission intensity of the rare earth complexes differently. By changing the mole fraction of Gd^3＋ ion,we found that if the mole fraction of Gd^3 ＋ ion is between 0. 1 to 0. 6, the complexes can get higher fluorescence intensity than that of the pure Eu^3＋ system. When the mole fraction

关 键 词：Β-二酮 邻菲哕啉 铕配合物 掺杂 

分 类 号：O482.31[理学—固体物理] O614.33[理学—物理]