Amphiphilic behavior of two phosphonium based ionic liquids

作者：Mukherjee Indrajyoti; Mukherjee Suvasree; Naskar Bappaditya; Ghosh Soumen; Moulik Satya P^*

来源：Journal of Colloid and Interface Science, 2013, 395: 135-144.

DOI：10.1016/j.jcis.2012.11.064

• Ionic liquids
• Viscosity
• Surface activity
• Micelles
• Microemulsions
• Phase behavior
• Anti-cancer activity

Solution and surface chemical behavior of two phosphonium based ionic liquids triisobutyl (Methyl) phosphonium tosylate (IL-1) and trihexyl (tetradecyl) phosphonium bis 2,4,4-(trimethylpentyl)phosphinate (IL-2) have been studied. The polar IL-1 is surface active and water soluble, whereas the weakly polar IL-2 is more surface active with very low aqueous solubility. IL-1 does not form micelles but affects the micellization properties of ionic, nonionic, and zwitterionic surfactants more strongly than conventional electrolytes. IL-2 itself forms micelles and mixed micelles with Triton X-100 (TX-100) in aqueous solution. It also forms Langmuir monolayers of liquid expanded type, at the air/water interface. IL-1 can replace water in forming microemulsions with the oil isopropylmyristate (IPM), stabilized by IL-2 (surfactant) + isopropanol (IF as a co-surfactant) like the IL-1/IPM/(IL-2+IP) system. It produces a large monophasic zone in the pseudoternary phase diagram. The thermodynamics of formation of the microemulsions of IL-1 in oil (IPM) have been examined. The dimensions and the polydispersity of the dispersed nano-droplets in the microemulsions have been determined by DLS. The thermal stability of the microemulsion forming systems has also been studied. ILs studied against Sarcoma-180 cell lines have evidenced proficient anti-cancer activity of IL-1 and moderate activity of IL-2.

• 出版日期2013-4-1