新的β-二酮及其Eu(Ⅲ)配合物的合成表征及荧光性能研究  

Synthesis,Characterization and Fluorescence of a New β-Diketone Ligand and Its Europium(Ⅲ) Complexes

作　　者：豆丽靖[1] 王娟[1] 吴宏 颜剑波 王云友 孙波[1] 

机构地区：[1]南开大学化学学院材料化学系,天津300071 [2]中国东港工贸集团公司,浙江台州318000

出　　处：《中国稀土学报》2009年第5期587-591,共5页Journal of the Chinese Society of Rare Earths

摘　　要：合成了一种新的β-二酮,2-吡啶甲酰苯甲酰甲烷(HPBM),以元素分析和1H NMR谱确定了其组成,核磁和红外分析结果表明HPBM主要以烯醇式存在。以HPBM作配体采用溶液析出法合成了Eu(Ⅲ)的二元配合物,并以邻菲罗啉(Phen)、三苯基氧膦(TPPO)作为第二配体合成了两种新的三元配合物,用元素分析、红外光谱、紫外可见吸收光谱和荧光光谱进行了表征。荧光光谱研究表明:配体与Eu3+之间存在着有效的能量传递,且显示Phen和TPPO对配合物有较强的敏化作用。发射光谱表明三种配合物均显示Eu3+离子的特征发射光谱,发射谱线很窄,主发射峰为Eu3+的5D0-7F2发射。三种配合物中Eu(PBM)3(TPPO)(H2O)2发光强度最高,是具有一定应用价值的红色高亮发光材料。A new β-diketone, 2-picolinoyl-benzoylmethane was prepared with high yield, and the composition of the new β-diketone was confirmed by elemental analysis and ^1H NMR spectroscopy. The result of ^1H NMR spectroscopy indicated that the HPBM existed as an enol form isomer, which was consistent with the result of IR analysis. The Eu （ PBM）3 （H2O） Eu （ PBM）3 （Phen） （ H2 O）2 and Eu （ PBM ）3 （ TPPO ） （H2O）2 were synthesized by a precipitation method using HPBM, 1,10-phenanthroline and triphenyl phosphine oxide as the ligands, respectively. The compounds were characterized by elemental analysis, IR, UV-vis spectra and fluorescence excitation and emission spectra. The IR spectra indicated that 2-picolinoyl-benzoyl-methane was bonded with Eu （ Ⅲ ） through oxygen atoms as an enol form isomer, and the ligand 1, 10-phenanthroline was bonded to Eu （ Ⅲ ） through nitrogen atoms, and also triphenyl phosphine oxide was coordinated with Eu （ Ⅲ ） through oxygen atom. The photoluminescence measurements indicated that there was effective energy-transfer from the organic ligands to the central Eu （ Ⅲ ）. The fluorescence spectra showed that the fluorescence emission intensity of Eu （PBM）3 （TPPO） （ H2O）2 was the strongest. That was to say, the emission intensities of europium ions were greatly sensitized by TPPO. The characteristic emission bands of Eu^3＋ in these complexes were observed, and the strongest emission band was attributed to the ^5D0 →^7F2 transitions of the central Eu^3＋ ions. The synthesized Eu （Ⅲ） ternary complex Eu （PBM） 3 （TPPO）（ H2O）2 was an excellent red-emitter with an electron-transporting group, which would he considered as a valuable material with bright red fluorescence.

关 键 词：铕 Β-二酮 稀土配合物 荧光性能 

分 类 号：O614.338[理学—无机化学]