title: Structural rearrangement in the aqueous solution of surface active ionic liquid 1-butyl-3-methylimidazolium bis(2-ethylhexyl) sulfosuccinate.
abstract: The aggregation behaviors of surface active ionic liquid 1-butyl-3-methylimidazolium bis(2-ethylhexyl) sulfosuccinate in aqueous solutions were investigated by conductometry, densimetry, fluorimetry, (1)H nuclear magnetic resonance ((1)H NMR) spectroscopy, dynamic light scattering (DLS), and transmission electron microscopy (TEM), which confirmed two distinguished critical concentrations. The first critical concentration was believed to be the critical aggregation concentration (CAC), where two different types of aggregates were formed, namely, micelles with the size of 10 nm and vesicles with the size of 100 nm. The second critical concentration at two-fold CAC was suggested to be resulting from the insertion of the imidazolium cations into aggregates.
authors.affiliation: School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China. shenwg@ecust.edu.cn.
authors.forename: Tianxiang
authors.initials: T
authors.lastname: Yin
authors.forename: Jiequn
authors.initials: J
authors.lastname: Wu
authors.forename: Shuzhen
authors.initials: S
authors.lastname: Wang
authors.forename: Weiguo
authors.initials: W
authors.lastname: Shen