Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 17, Issue 7, Pages 2138-2145Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201002069
Keywords
Belousov-Zhabotinsky reaction; diffusion; dissipative processes; reverse microemulsions; Taylor dispersion
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Funding
- National Science Foundation [CHE-0526866]
- European Community
- Radcliffe Institute
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We measure cross-diffusion coefficients in a five-component system, an aerosol OT (AOT) water-in-oil microemulsion loaded with two constituents of the Belousov-Zhabotinsky (BZ) reaction (H2O/AOT/BZ1/BZ2/octane). The species BZ1 is either NaBr, an inhibitor of the BZ reaction, or ferroin, a catalyst for the reaction. As species BZ2, we choose Br-2. an intermediate in the reaction. The cross-diffusion coefficients between BZ1 and BZ2 are found to be negative, which can be understood in terms of complexation between these species. Using a four-variable model for the BZ reaction, we find that the cross-diffusion coefficients measured here can lead to a noticeable shift in the onset of Turing instability in the BZ-AOT system.
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