Spectroanalytical Laboratory, Department of Chemistry, JN Vyas University Jodhpur India

Email:-seema.aacharya@gmail.com

The solubilization of acenaphthene, a PAH, in to the micellar core of certain surfactants has been studied with the help of fluorescence spectroscopy. The various surfactants used for study are nonionic as well as ionic ones. The nonionic surfactants used are TX-100, Tween-80, and Tween-40, the anionics are DBSS and DSSS and two of the cationic surfactants are CPC and CPB. The fluorescence peak height enhanced gradually on increasing the nonionic surfactants concentration with a bathochromic shift of 5-10nm. The dual nature of surfactant micelle is responsible for the occurrence of properties of surface activity, solubilization and micellization. The increase in fluorescence intensity in micellar media can be attributed to the increase in quantum efficiency. This suggests that the surfactants have solubilized the suspended molecules of acenaphthene. The solubilization phenomenon has also been confirmed by quantitative calculation like, quantum yield, empirical fluorescence coefficient, molar extinction coefficient, and Stokes' shift. The calculated results are in good agreement with the experimental observation.