新型双发色团染料荧光光谱及其寿命的研究

THE FLUORESCENCE SPECTRA AND LIFETIME OF NOVEL BICHROMOPHORIC DYES

新型双发色团染料荧光光谱及其寿命的研究田禾，苏建华，陈孔常（华东理工大学精细化工研究所，上海２００２３７）张镇平，郭孟鑫（台湾辅仁大学理工学院化学系，台北２４２）关键词荧光寿命，能量传递，多发色团染料有效的染料激光操作需要较高的荧光量子效率，若丹明是...

Novel bichromophoric rhodamine dyes,in which carbazole chromophore was connected with rhodamine 6G or rhodamine DR-21 by -CH_2CH_2-,have been synthesized.The absorption and fluorescence spectra of these bichromophoric dyes have been measured. The absorption of the bichromophoric dyes is the sum of that of two chromophores alone.A lot of fluorescence emission of carbazole in the bichromophoric dyes was quenched. The fluorescence lifetimes of the dyes have been measured by single-photon counting technique. The fluorescence lifetime of carbazole is shortened obviously in the bichromophoric dyes(from 15.4 ns reduced to about 7.8ns). The intramolecular energy transfer and charge transfer between two chromophores have been discussed.