6533b853fe1ef96bd12acad8

RESEARCH PRODUCT

FT-IR and dielectric study of water/AOT liquid crystals

Pietro CalandraEugenio CaponettiD. Chillura MartinoV. Turco LiveriPaola D'angeloA. Minore

subject

chemistry.chemical_classificationSodiumOrganic ChemistryAnalytical chemistryIonic bondingchemistry.chemical_elementDielectricAnalytical ChemistryInorganic ChemistrychemistryPulmonary surfactantLiquid crystalCounterionFourier transform infrared spectroscopySpectroscopySpectroscopy

description

Abstract In order to explore the influence of microwave radiation on highly viscous microheterogeneous systems, the evolution of structural and dynamical properties of the water/sodium bis(2-ethylhexyl) sulfosuccinate (AOT) liquid crystals as a function of the molar ratio R (R=[water]/[AOT]) has been investigated by FT-IR spectroscopy and time domain reflectometry. The study emphasises how the progressive hydration of the surfactant head groups is mainly responsible for the structural and dynamical evolution of water/AOT liquid crystals. In particular, it has been found that the state of water at lower R values is strongly perturbed, bulk-like water appears only at R>23 and the water/AOT interface polarisation is controlled by the fast translational dynamics of sodium counterions and the slow orientational dynamics of the AOT ionic head groups.

yearjournalcountryeditionlanguage
2000-04-01Journal of Molecular Structure
https://doi.org/10.1016/s0022-2860(99)00351-8