Long-lived oscillations in the chlorite-iodide-malonic acid reaction in batch

Z. Noszticzius, Qi Ouyang, William D. McCormick, Harry L. Swinney

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The title reaction is the subject of current interest because the first experimental Turing patterns were observed recently in this system. Here we report the first observation of oscillations that are long-lived (over 1 h) in this system in a batch reactor; even after cessation the oscillations can be restarted several times by adding ClO2 to the exhausted system. These low-frequency low-amplitude (LL) oscillations were detected with both platinum and iodide-selective electrodes in the chlorite-iodide-malonic acid (original CIMA) reaction and in the closely related chlorine dioxide-iodide-malonic acid (minimal CIMA) system. The LL oscillations follow after the already known high-frequency oscillations, sometimes separated by a second induction period. LL oscillations can appear without any induction period if appropriate concentrations of chlorine dioxide, iodomalonic acid, and chloride (CIMA-Cl system) are established in a dilute sulfuric acid medium. In this case neither iodine, iodide, nor malonic acid is needed. Some suggestions are made regarding the mechanism of these newly discovered oscillations.

Original languageEnglish
Pages (from-to)4290-4295
Number of pages6
JournalJournal of the American Chemical Society
Volume114
Issue number11
Publication statusPublished - 1992

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Iodides
Acids
Chlorine
Batch reactors
Platinum
Iodine
Sulfuric acid
Chlorides
Electrodes
Observation
malonic acid
chlorite
chlorine dioxide

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Long-lived oscillations in the chlorite-iodide-malonic acid reaction in batch. / Noszticzius, Z.; Ouyang, Qi; McCormick, William D.; Swinney, Harry L.

In: Journal of the American Chemical Society, Vol. 114, No. 11, 1992, p. 4290-4295.

Research output: Contribution to journalArticle

Noszticzius, Z. ; Ouyang, Qi ; McCormick, William D. ; Swinney, Harry L. / Long-lived oscillations in the chlorite-iodide-malonic acid reaction in batch. In: Journal of the American Chemical Society. 1992 ; Vol. 114, No. 11. pp. 4290-4295.
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