Quaternary cross-diffusion in water-in-oil microemulsions loaded with a component of the Belousov-Zhabotinsky reaction

Federico Rossi; Vladimir K Vanag; Enzo Tiezzi; Irving R Epstein

doi:10.1021/jp102753b

Quaternary cross-diffusion in water-in-oil microemulsions loaded with a component of the Belousov-Zhabotinsky reaction

J Phys Chem B. 2010 Jun 24;114(24):8140-6. doi: 10.1021/jp102753b.

Authors

Federico Rossi¹, Vladimir K Vanag, Enzo Tiezzi, Irving R Epstein

Affiliation

¹ Department of Chemistry and Volen Center for Complex System, MS 015, Brandeis University, Waltham, 02454-9110, USA.

PMID: 20509697
DOI: 10.1021/jp102753b

Abstract

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, NaBrO(3), bathoferroin, ferroin, or Br(2). 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 Br(2), 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.