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合成了一种新的双β二酮配体1,4-二苯甲酰乙酰苯(TDAP),并成功合成了它的两个双核稀土配合物Eu2(TDAP)3·(H2O)2和Tb2(TDAP)3·(H2O)6。通过元素分析、红外光谱、紫外可见光谱和荧光光谱对配合物进行了表征与性能研究。荧光分析表明,在紫外灯下配体本身就发出蓝紫色荧光,通过对配体TDAP的磷光光谱分析计算得到了配体的平均三重态能级。配合物Eu2(TDAP)3·(H2O)2的发射光谱分析表明,配体自身的发射几乎完全被淬灭,能量成功传递给了中心离子,因此配合物发出了明显的特征峰,主发射峰为Eu3+的5D0-7F2发射。由荧光分析知,配合物Eu2(TDAP)3·(H2O)2的激发光谱与配体发射光谱的重叠,这验证了配体TDAP对于Eu3+能量传递的有效性。此外,还详细分析了两种配合物的能量传递过程及发光机理,配合物Tb2(TDAP)3·(H2O)6几乎不发光,这是因为配体的三重态能级与Tb3+的最低激发态能级不匹配。合成的配合物Eu2(TDAP)3·(H2O)2有很强荧光,是一种有效的红色发光材料。
A novel bis-diketone ligand 1,4-dibenzoyl acetophenone (TDAP) was synthesized and its two dual-core rare earth complexes Eu2 (TDAP) 3 · (H2O) 2 and Tb2 (TDAP) 3 · (H2O) 6. The complexes were characterized and characterized by elemental analysis, IR, UV-Vis and fluorescence spectroscopy. Fluorescence analysis showed that the ligand itself emits blue-purple fluorescence under ultraviolet light. The average triplet energy level of the ligand was calculated by phosphorescence spectrum analysis of TDAP. The emission spectra of the complex Eu2 (TDAP) 3 · (H2O) 2 showed that the emission of the ligand itself was almost completely quenched and the energy was successfully transferred to the central ion. Therefore, the complex emitted significant characteristic peaks with the main emission peak Eu3 + 5D0-7F2 emission. From the fluorescence analysis, the overlap of the excitation spectrum and the ligand emission spectrum of the complex Eu2 (TDAP) 3 · (H2O) 2 verifies the effectiveness of the ligand TDAP for Eu3 + energy transfer. In addition, the energy transfer process and luminescence mechanism of the two complexes were also analyzed in detail. The Tb 2 (TDAP) 3 · (H 2 O) 6 hardly emits light because the triplet energy level of the ligand and the lowest excited state of Tb 3+ The level does not match. The complex Eu2 (TDAP) 3 · (H2O) 2 has strong fluorescence and is an effective red luminescent material.