Probing the internal dynamics of reverse micelles formed in highly compressible solvents: Aerosol-OT in near-critical propane

Journal Article · Thu Oct 29 04:00:00 EST 1992 · Journal of Physical Chemistry

DOI:https://doi.org/10.1021/j100201a070· OSTI ID:458840

Zhang, J; Bright, F V ^[1]

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1. State Univ. of New York, Buffalo, NY (United States)

In normal liquids, the rate of water reorganization within the interior of AOT (sodium bis(2-ethylhexyl) sulfosuccinate or Aerosol-OT) reverse micelles in a strong function of water loading and temperature. In this report, we discuss our most recent efforts to understand the internal dynamics of reverse micelles maintained in highly compressible solvents (near-critical propane). By using steady-state and time-resolved fluorescence spectroscopy, we report the first evidence for pressure-assisted control of the rate of solvent relaxation within the core region of a reverse micelle maintained in a highly compressible fluid. Three factors are taken into account in this study: amount of water loading, temperature, and bulk fluid density. The key conclusion is that the continuous phase density can influence the rate of solvent reorientation within the interior of AOT micelles formed in near-critical propane. 58 refs., 10 figs., 3 tabs.

• Sponsoring Organization: USDOE
• DOE Contract Number: FG02-90ER14143
• OSTI ID: 458840
• Journal Information: Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 22 Vol. 96; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
DYNAMICS
MICELLAR SYSTEMS
PROPANE
SODIUM COMPOUNDS
SOLVENTS
TEMPERATURE DEPENDENCE
WATER