A 1H nuclear magnetic resonance chemical-shift study of inverted microemulsions of aerosol OT in benzene and cyclohexane. Partitioning of water between hydrocarbon and aqueous phases
- 1 January 1988
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
- Vol. 84 (1) , 343-354
- https://doi.org/10.1039/f19888400343
Abstract
Chemical shifts in inverted microemulsions of sodium bis(2-ethyl-hexyl)sulphosuccinate (AOT) in perdeuterobenzene and perdeuterocyclo-hexane have been measured as a function of AOT concentration, H2O/AOT ratio (R) and temperature. Free water in the hydrocarbon phase has been detected and quantified. The concentration of free water depends on R, and approaches the solubility of water in pure hydrocarbon when R 1. There is evidence of a specific interaction between the AOT polar headgroup and C6D6, leading to deshielding of the protons. The AOT headgroup conformation shows little dependence on composition.Keywords
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