Issue 6, 2010
From the journal:

Physical Chemistry Chemical Physics

Oscillatory concentration pulses of some divalent metal ions induced by a redox oscillator

Viktor Horváth,a   Krisztina Kurin-Csörgei,a   Irving R. Epstein*b  and  Miklós Orbán*a  

* Corresponding authors

a Department of Analytical Chemistry, L. Eötvös University, H-1518 Budapest 112, P.O. Box 32, Hungary
E-mail: orbanm@ludens.elte.hu

b Department of Chemistry and Volen Center for Complex Systems, MS 015, Brandeis University, Waltham, USA
E-mail: epstein@brandeis.edu

Abstract

Oscillations in the concentration of divalent ions Cd2+, Ca2+, Zn2+, Co2+ and Ni2+ are induced by adding these species to the BrO3−–SO32− chemical oscillator in a flow reactor. Producing periodic pulses in the concentrations of these non-redox ions extends our earlier approach to generating forced periodic behavior. Instead of driving pH-dependent equilibrium reactions of the target ion by a pH oscillator backward and forward, we now couple a redox core oscillating reaction to two consecutive reactions taking place between the components of the oscillator and the target element. In the systems examined here, the oscillatory reductant SO32− binds the free metal ion in a MSO3 precipitate, reducing its level to a minimal value when [SO32−] is high, followed by release of the metal ion when the sulfite is oxidized by BrO3−.

Graphical abstract: Oscillatory concentration pulses of some divalent metal ions induced by a redox oscillator

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Article information

DOI
https://doi.org/10.1039/B919924A
Article type
Paper
Submitted
24 Sep 2009
Accepted
01 Dec 2009
First published
23 Dec 2009

Phys. Chem. Chem. Phys., 2010,12, 1248-1252

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Oscillatory concentration pulses of some divalent metal ions induced by a redox oscillator

V. Horváth, K. Kurin-Csörgei, I. R. Epstein and M. Orbán, Phys. Chem. Chem. Phys., 2010, 12, 1248 DOI: 10.1039/B919924A

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