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合成了1-(邻氯苯基)-3-(2-羟基苯基)-丙二酮(L1)、1-(间氯苯基)-3-(2-羟基苯基)-丙二酮(L2)和1-(对氯苯基)-3-(2-羟基苯基)-丙二酮(L3)3种配体,并将此3种配体分别与Eu(III)反应生成3种新的稀土配合物。运用元素分析、红外光谱与荧光光谱等手段对配合物进行了表征。结果表明:3种配合物的组成分别为Eu(L1)3·2H2O、Eu(L2)3·2H2O和Eu(L3)3·2H2O。荧光光谱显示,3种配合物的配体均能将吸收的能量有效地传递给三价铕离子,从而使配合物发射出强的铕离子的特征荧光。在3种配合物中,Eu(L1)3·2H2O的荧光强度远大于Eu(L2)3·2H2O和Eu(L3)3·2H2O的荧光强度,这说明配体L1与Eu(III)离子的能级匹配较好,能量传递效率较高。
The synthesis of 1- (o-chlorophenyl) -3- (2-hydroxyphenyl) -propane dione (L1), 1- (L2) and 1- (p-chlorophenyl) -3- (2-hydroxyphenyl) -propane dione (L3) were synthesized and these three ligands were respectively reacted with Eu New kinds of rare earth complexes. The complexes were characterized by elemental analysis, infrared spectroscopy and fluorescence spectroscopy. The results show that the compositions of the three complexes are Eu (L1) 3 · 2H2O, Eu (L2) 3 · 2H2O and Eu (L3) 3 · 2H2O, respectively. Fluorescence spectra showed that the ligands of all three complexes could efficiently transfer the absorbed energy to the trivalent europium ions, so that the complex emitted strong fluorescence of europium ions. Among the three complexes, the fluorescence intensity of Eu (L1) 3 · 2H2O is much larger than that of Eu (L2) 3 · 2H2O and Eu (L3) 3 · 2H2O, which shows that the fluorescence intensity of Eu Better energy level matching and higher energy transfer efficiency.