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

Solvent Effect of Europium(Ⅲ)Complex Sensitized by Charge Transfer Excited State of Functional Cation

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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 functional 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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 acetonitrile is much higher than in other solvents.The detailed discussion about solvent effect is provided in this paper.