High static pressure alters water-pool properties in reversed micelles formed by aerosol OT (sodium bis(2-ethylhexyl)sulfosuccinate): A high pressure ESR study

Yoshimi Sueishi, Daisuke Yoshioka, Mieko Negi, Yashige Kotake

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ESR spectra of Fremy's salt in sodium bis(2-ethylhexyl)sulfosuccinate (AOT) reversed micelles were recorded at high pressures in order to monitor dynamic properties of water molecules inside water pools. Rotational correlation times of Fremy's salt in large AOT water pools slightly decreased with increasing pressure, conversely those in small water pools increased with pressure: ΔV for the rotational motion = -1.05 and 9.19 cm 3 mol-1 at ω0 = 20 and 2, respectively. These results demonstrate that most water molecules in small water pools are bound to AOT head groups and show very different physical properties from bulk water.

Original languageEnglish
Pages (from-to)261-264
Number of pages4
JournalChemical Physics Letters
Issue number4-6
Publication statusPublished - Nov 11 2005


ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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