Chemical origin of the sustained-like pattern formation observed in the bromate - Dual substrate - Dual catalyst oscillatory batch system

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2 Citations (Scopus)

Abstract

The BrO 3 - - BrAc - Ru(bpy) 3 2+ subsystem is shown to represent the core oscillator that serves as source of the long lasting temporal and spatial periodic behaviors observed in the BrO 3 - - H2PO 2 - - acetone - Mn2+ - Ru(bpy) 3 2+ - acid "double substrate-double catalyst" oscillatory batch system. The BrAc - the substrate of the core oscillator - is formed and accumulated in the reactions taking place in the six-component system. BrAc was produced in a separate experiment with bromide, acetone, acid and excess bromate and the mixture was used for bringing about patterns in the thin solution layer after adding the Ru(bpy) 3 2+ catalyst. The two-dimensional reaction-diffusion patterns that appear in the subsystem and its parent system are very similar in wave speed, wavelength, color and in the duration of the pattern evolution, therefore a common chemical origin is supposed to exist in their formation. The role that the BrAc may play in the mechanism of the BrO 3 - - reductant - acetone - catalyst type oscillators (∼ 30 variants) is also pointed out.

Original languageEnglish
Pages (from-to)405-411
Number of pages7
JournalReaction Kinetics and Catalysis Letters
Volume90
Issue number2
DOIs
Publication statusPublished - Apr 1 2007

Keywords

  • Bromate oscillators
  • Pattern formation

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

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