借助功能阳离子实现敏化发光的铕配合物的溶剂效应的研究

摘要

在离子缔合型铕配合物Eu(tta)4·DEASPI中,借助功能阳离子DEASPI的电荷转移激发态可以实现对铕离子的单光子与双光子的敏化发光,其能量传递遵循F(o)rster机制.将Eu(tta)4·DEASPI溶解于多种有机溶剂中(丙酮、DMF、乙醇和乙腈),发现溶剂效应对于该能量传递体系的影响非常显著.借助光谱测量,发现在乙腈溶液中能量传递效率远高于其他三种溶剂.本文对造成溶剂效应的多种因素进行了详细的分析.%In the novel europium(Ⅲ) complex of the form [Eu(tta)4 · DEASPI],the sensitization of lanthanide luminescence is via functioml cation.The photophysical sensitization process of Eu(tta)4 · DEASPI involves an energy transfer from charge transfer excited state of hemicyanine (aminostyrylpyridinium) cation,and the sensitization mechanism follows F(o)rster resonance energy mechanism.The solvent effect on this new kind of europium(Ⅲ) complex was investigated in the present work.The europium(Ⅲ) complex was dissolved in a variety of solvents,i.e.acetone,DMF,ethanol and acetonitrile,and the emission intensity of europium(Ⅲ) complex in acetonitrih is much higher than in other solvents.The detailed discussion about solvent effect is provided in this paper.