Dynamics of Spiral Centres in the Ferroin-Catalyzed Belousov-Zhabotinskii Reaction
Part of the
NATO ASI Series
book series (NSSB, volume 244)
Wave propagation under far from equilibrium conditions has been studied in some detail in chemical excitable media, mostly in the ferroin catalyzed Belousov-Zhabotinskii reaction [3, 13]. In this reaction a chemical wave is detectable by its blue excited front. It indicates the presence of ferriin, the oxidized state of the catalyst, which travels through a quiescent, red solution layer where the catalyst remains in its reduced form ferroin. The spatial distribution of the catalyst concentration in such wave patterns can be determined quantitatively with devices for ID and 2D spectrophotometry [6, 11, 15]. Progress is being made in applying these precise recording and evaluation techniques to the analysis of wave shapes and profiles under systematic variation of system parameters, in particular of the initial concentrations of the chemicals mixed into the solution [9, 10].
KeywordsMalonic Acid Sodium Bromide Archimedian Spiral Chemical Wave Molecular Bromine
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