Synthesis and studies on surface and self-assembly properties of polyphenylsulfonates in aqueous solution. Part 2. Sodium 2′-methyl-5′-phenyl-1,1′ : 3′,1″-terphenyl-4-sulfonate

Abstract

A study of the effect of introduction of a methyl group into the central benzene ring of the symmetrical triphenylbenzene sulfonate on its aggregation behaviour in aqueous solutions has been carried out. The solubility of the sodium salt in water is enhanced and its saturated solution at 25 °C is in equilibrium with a lamellar liquid crystalline phase. The onset of aggregation of the salt was revealed by surface tension measurements. Conductivity data suggest that dimerization precedes the formation of higher oligomeric species. Extensive self-assembly processes have been confirmed by vapour pressure osmometry.