Micellization and Effect of Salt Behavior on Meristyl Alcohol Based Bis-Sulfosuccinate Gemini Surfactants in Aqueous Solutions

Abstract

A series of bis-sulfosuccinate anionic gemini surfactants were synthesized from meristyl alcohol (BSGSMA1,4; BSGSMA1,6, and BSGSMA1,8) containing 4, 6, and 8 methylene chains as different flexible spacer lengths. The chemical structures of synthesized geminis were confirmed by using spectroscopic analytical techniques, viz., elemental analysis, Fourier transform infrared spectroscopy (FTIR), and nuclear magnetic resonance spectroscopy(NMR). Investigations were carried out to examine the effect of different spacer length and different salts (organic and inorganic) on surface and fluorescence properties of prepared gemini surfactants. The results of surface properties shown that surface tension at CMC (ϒCMC) and critical micelle concentration (CMC) were reduced and pC20 value was enhanced with increased spacer length. Fluorescence investigations were also revealed the significance of longer spacer with the concluded remarks of higher aggregation number and reduced micropolarity for BSGSMA1,8 having elongated flexible spacer. The results of salts studies had shown the better results for organic salts as compared to inorganic salts.