Dynamics of Solvation of the Fluorescent State of Some Electron Donor−Acceptor Molecules in Room Temperature Ionic Liquids, [BMIM][(CF3SO2)2N] and [EMIM][(CF3SO2)2N]

摘要: Room temperature ionic liquids, particularly those based on the imidazolium salts, have emerged in recent years as highly promising “green” media suitable for carrying out various reactions. In this paper, picosecond time-resolved fluorescence decay behavior of three electron donor−acceptor (EDA) molecules, coumarin-153 (C153), 6-propionyl-2-dimethylaminonaphthalene (PRODAN), and 4-aminophthalimide (AP), two room 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([EMIM][(CF3SO2)2N]) 1-butyl-3-methylimidazolium bis(trifluoromethane sulfonyl)imide ([BMIM][(CF3SO2)2N]), has been reported. The steady-state EDA molecules suggests that polarity liquids ET(30) scale is around 47.6 [EMIM][(CF3SO2)2N] 47.1 [BMIM][(CF3SO2)2N]. systems these found to be dependent monitoring wavelength, suggesting solvent-induced relaxation fluoresce...