带不同取代基氧鎓盐化合物电子光谱的研究

STUDY ON THE ELECTRONIC SPECTRA OF SOME SUBSTITUTED PYRYLIUM SALTS

本工作对几种不同取代氧鎓盐化合物的荧光光谱和荧光猝灭进行研究,发现在液氮温度下,激发的氧鎓盐分子能和作为猝灭剂的电子给体分子在光谱的长波方向发出激基复合物的荧光。在基态条件下,氧鎓盐能和电子给体生成稳定的电荷转移络合物(CTC)。在冻结的条件下,由于激发的络合物不容易解离或减少了某些无辐射衰减的途径,有可能明显地观察到激发的CTC的发光。

The fluorescence spectra and fluorescence quenching of some substituted pyrylium salts have been studied in this work. It was found that under liquid N2 temperature the exciplex emission in the region of longer wave length can be observed from the excited molecule of pyrylium salts with some quenchers used as an electron donor. Obtained results also indicated that a ground state stable CT complex can be formed when the pyrylium salt mixed with the electron donor. Therefore, the emission of excited CT complex in the frozen condition may be observed evidently, due to the difficult dissociation of the excited CT complex of the diminution of some routes of radiationless decay.