Investigation into the Use of Sodium, para-fluorobenzoate as a 12-3-12 Br Gemini Surfactant Counterion

Investigation into the use of sodium, para-fluorobenzoate (p-FB) as a 12-3-12 Br Gemini surfactant counter ion was studied. The critical micelle concentration of the 12-3-12 Br surfactant was determined to be 1.0221mM using fluorescence and conductivity measurements. Varying solutions of Na + , p-fluorobenzoate from 0 to 10 mM in 2mM increments were prepared in a constant 10 mM 12-3-12 Br surfactant solution. Solutions of Na + , p-fluorobenzoate from 0 to 20 mM in 4 mM intervals were prepared in a constant 20 mM 12-3-12 Br surfactant solution. Viscosity changes were noted in each series of solution and rod-like micelles were formed from 8mM to 12mM in the 20mM series and 4mM to 8mM in the 10mM series. Chromatograms were generated from running these solutions on HPLC-UV. Peak areas in the chromatograms were then compared to a series of standards in order to determine the interfacial concentrations of varying species at the interface. The data obtained suggests that the use of parafluorobenzoate produces a stabilizing effect upon the formation of rod-like micelles of the 12-3-12 Br surfactant.