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合成了几种新型的轻稀土2,5-噻吩二羧酸-1,10-菲咯啉的三元配合物,通过元素分析、热分析、红外光谱法确定其组成为Ln_2(L)_3(phen)_2·nH_2O(Ln=La,n=2;Ln=Sm,Eu,Gd,n=4)。重点研究了铕配合物的荧光性能,并测定其荧光寿命为0.83 ms。另以Gd~(3+)配合物为模型化合物,通过低温磷光光谱确定了2,5-噻吩二羧酸配体的三重态能级为18200 cm~(-1),并通过低温磷光寿命的测定详细讨论了有机配体之间的分子内能量传递机制和效率。
Several novel ternary complexes of 2,5-thiophenedicarboxylic acid-1,10-phenanthroline were synthesized and their compositions were characterized by elemental analysis, thermal analysis and infrared spectroscopy as Ln_2 (L) _3 ( phen) _2 · nH_2O (Ln = La, n = 2; Ln = Sm, Eu, Gd, n = 4). The fluorescence properties of europium complexes were studied emphatically, and their fluorescence lifetime was 0.83 ms. In addition, Gd 3+ complex was used as a model compound to determine the triplet energy level of 2,5-thiophene dicarboxylic acid ligand as 18200 cm -1 by low temperature phosphorescence spectroscopy. The measurement details the intramolecular energy transfer mechanism and efficiency between organic ligands.