对苝和芘荧光猝灭性质的比较研究

The Comparisons of Fluorescence Quenching between Perylene and Pyrene

对和芘在电子给体化合物N ,N 二甲苯胺 (DMA)和电子受体化合物对苯二甲酸二甲酯 (DMTP)作用下的荧光猝灭进行了研究 ,结果表明芘与DMA和DMTP在室温下均可形成激基复合物 (exciplex) ,而仅仅与DMA形成exciplex。荧光猝灭的数据符合Stern Volmer方程 :F0 /F =1+KSV[Q],芘的Stern Volmer常数KSV 大于。和芘在荧光猝灭方面的差别是由于分子并不是一个典型的大共轭体系 。

The fluorescence quenching of perylene and pyrene by dimethyl terephthalate (DMTP) and N,N dimethylaniline (DMA) have been investigated.The results show that pyrene can form exciplex with DMTP or DMA at room temperature and perylene can only form exciplex with DMA.The fluoescence quenching date is in conformity with the Stern Volmer equation:F 0/F=1+K SV [Q]=1+K q ·τ 0[Q],the F 0/F [Q] straight lines are drawn.The Stren Volmer constants and fluorescence quenching rate constants ( K SV and K q) are obtained.The Stern Volmer quenching constants of pyrene is larger than that of perylene.The differences is due to the molecular structure of perylene which is not a typical large conjugated system and less coplanar configuratin than pyrene.