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为了探讨2,3-二氢黄酮类化合物在发光材料方面的应用,首先合成了2,3-二氢黄酮类衍生物[3-(2-萘甲酰基)-2-苯基苯并二氢吡喃-4-酮(L)]配体,然后利用Eu(III)与此配体和水/邻菲罗啉(Phen)反应得到两种新型的红色荧光配合物。运用元素分析、红外光谱与荧光光谱等手段对相关物质进行了系统的表征。表征结果表明:两个新配合物的组成分别为Eu(L)3·2H2O和Eu(L)3·Phen;荧光光谱研究显示,两种配合物的配体能将吸收的能量有效地传递给铕离子,从而使配合物发射出强的铕离子的特征荧光,且两个配合物Eu(L)3·2H2O和Eu(L)3·Phen均以5D0→7F2跃迁的荧光发射最强。得到了两种新的高效的红色荧光材料。
In order to investigate the application of 2,3-dihydroflavonoids in luminescent materials, 2,3-dihydroflavonoid derivative [3- (2-naphthoyl) -2-phenylbenzodihydro Pyran-4-one (L)] ligands, and then two novel red fluorescent complexes were obtained by the reaction of Eu (III) with this ligand and water / phenanthroline. By means of elemental analysis, infrared spectroscopy and fluorescence spectroscopy, the related substances were systematically characterized. The results show that the two new complexes are Eu (L) 3 · 2H2O and Eu (L) 3 · Phen, respectively. Fluorescence spectroscopy shows that the ligands of the two complexes can effectively transfer the absorbed energy to Eu (L) 3 · 2H 2 O and Eu (L) 3 · Phen. The fluorescence emission of 5D0 → 7F2 transitions between Eu (L) 3 · 2H2O and Eu (L) 3 · Phen are the strongest. Two new and efficient red fluorescent materials were obtained.