Langmuir, Vol.25, No.18, 10426-10429, 2009
On the Formation of New Reverse Micelles: A Comparative Study of Benzene/Surfactants/Ionic Liquids Systems Using UV-Visible Absorption Spectroscopy and Dynamic Light Scattering
The microenvironment of the polar core generated in different ionic liquid reverse micelle (IL RM) systems Were investigated using the solvatochromic behavior of 1-methyl-8-oxyquinolinium betaine (QB) as all absorption probe and dynamic light scattering (DLS) technique. The novel RM systems consist of two different ILs-1-butyl-3-methylimidazolium tetrafluoroborate (bmimBF(4)) and 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (bmimTf(2)N)-sequestrated by two different surfactants-Triton X-100 (TX-100) and benzyl-n-hexadecyldimethylammonium chloride (BHDC)-in order to make IL/surfactant/benzene RMs. The effect of the variation of W-s (W-s = [IL]/[surfactant]) on the QB spectroscopy was used to characterize these nonaqueous RMs. DLS results confirm the formation of these IL RM systems because increasing W-s increases the droplet sizes. Moreover it is demonstrated that the structure of the sequestrated ILs depends strongly oil the type of surfactant use to create the RMs.