Conductometric and Spectrofluorimetric Studies of Cationic Gemini Surfactant in Aqueous Solutions

Abstract—The critical micelle concentration (cmc) of the cationic gemini surfactant was evaluated using the conductivity measurements. The conductivity as a function of surfactant concentration was measured at different temperatures and the data were used the find cmc and degree of counterion dissociation of the micelle (α). Thermodynamic parameters were also obtained from the temperature dependence of the cmc values. The micelle aggregation numbers (Nagg) of cationic gemini surfactant in aqueous medium has been obtained using steady state fluorescence quenching technique. The micropolarity of the systems was also evaluated from the ratio of intensity of peaks (I1/I3) of the pyrene fluorescence emission spectrum.