Abstract
Aggregation behavior of cationic gemini (hexanediyl-1,5-bis(dimethylcettylammonium bromide) (16-5-16)) surfactant with conventional single chain surfactants cetyltrimethylammonium bromide (CTAB) and tetradecyltrimethylammonium bromide (TTAB) were studied with the help of fluorescence measurements. Fluorescence probe is a proficient technique for examining the surfactant-surfactant interaction and aggregation. The micelle aggregation number (Nagg) was measured using steady-state fluorescence quenching method. The micelle aggregation numbers of binary combinations fall between those of constituent surfactants. The micropolarity (I1/I3), binding constant (Ksv) and dielectric constant (Dexp) of mixed systems were determined from the ratio of peaks intensity in the pyrene fluorescence spectrum. The I1/I3 values were found to be more than >1, showing more polar environment around pyrene in the mixed micelle as compared to the pure micelles.
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