Quaternary Cross-Diffusion in Water-in-Oil Microemulsions Loaded with a Component of the Belousov−Zhabotinsky Reaction

We obtain the diffusion matrix, D, consisting of the main and cross-diffusion coefficients for a loaded AOT microemulsion, a quaternary system containing water (1)/AOT (2)/species (3)/octane (4). Here “species” is a component of the Belousov−Zhabotinsky reaction: NaBr, NaBrO3, bathoferroin, ferroin,...

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Bibliographic Details
Published in:	The journal of physical chemistry. B 2010-06, Vol.114 (24), p.8140-8146
Main Authors:	Rossi, Federico, Vanag, Vladimir K, Tiezzi, Enzo, Epstein, Irving R
Format:	Article
Language:	eng
Subjects:	B: Statistical Mechanics, Thermodynamics, Medium Effects
Online Access:	Get full text
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Summary:	We obtain the diffusion matrix, D, consisting of the main and cross-diffusion coefficients for a loaded AOT microemulsion, a quaternary system containing water (1)/AOT (2)/species (3)/octane (4). Here “species” is a component of the Belousov−Zhabotinsky reaction: NaBr, NaBrO3, bathoferroin, ferroin, or Br2. The main and cross-diffusion coefficients of each species depend crucially on its solubility. For water-soluble species (the salts), D 13 and D 23 are large (much larger than the main diffusion coefficients) and positive. For species located mainly in the surfactant shell (bathoferroin or ferroin), D 13 and D 23 are large and negative. For oil-soluble Br2, D 13 and D 23 are larger and more negative, whereas D 33 ≫ D 11, D 22. The coefficients D 31 and D 32 are small for all species studied.
ISSN:	1520-6106 1520-5207