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Complex oscillations in the Belousov–Zhabotinsky batch reaction with methylmalonic acid and manganese(ii)

The Belousov–Zhabotinsky (BZ) oscillating chemical reaction involves the oxidation of an organic compound by the bromate ion in the presence of a metal ion catalyst such as cerium(iv), manganese(ii), or ferroin. Simple periodic oscillations are generally obtained for the BZ reaction in a batch (clos...

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Autores principales: Frerichs, Glen A., Yengi, Desmond
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9030520/
https://www.ncbi.nlm.nih.gov/pubmed/35479119
http://dx.doi.org/10.1039/d1ra01734a
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author Frerichs, Glen A.
Yengi, Desmond
author_facet Frerichs, Glen A.
Yengi, Desmond
author_sort Frerichs, Glen A.
collection PubMed
description The Belousov–Zhabotinsky (BZ) oscillating chemical reaction involves the oxidation of an organic compound by the bromate ion in the presence of a metal ion catalyst such as cerium(iv), manganese(ii), or ferroin. Simple periodic oscillations are generally obtained for the BZ reaction in a batch (closed) system. However, complex oscillations have been observed for the BZ reaction in batch with malonic acid and either cerium or ferroin ions as the catalyst. We report here that fascinating complex oscillations in the potential of a Pt electrode have been found in the batch BZ reaction with methylmalonic acid (MeMA) and manganese(ii). Relatively high initial concentrations of NaBrO(3) and MeMA are required, and the [NaBrO(3)](0)/[MeMA](0) ratio is the main factor determining the type of oscillations obtained. Other relevant factors are [NaBr](0), [MnSO(4)](0), [H(2)SO(4)](0) or [NaOH](0), temperature, and stirring rate. Complex phenomena observed include mixed mode oscillations, birhythmicity, quasiperiodicity, bursting, and possible chaos. A mechanism is proposed involving the reversible formation of a manganese(iii) complex with bromomethylmalonic acid followed by two-electron oxidation to methyltartronic acid and Mn(2+).
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spelling pubmed-90305202022-04-26 Complex oscillations in the Belousov–Zhabotinsky batch reaction with methylmalonic acid and manganese(ii) Frerichs, Glen A. Yengi, Desmond RSC Adv Chemistry The Belousov–Zhabotinsky (BZ) oscillating chemical reaction involves the oxidation of an organic compound by the bromate ion in the presence of a metal ion catalyst such as cerium(iv), manganese(ii), or ferroin. Simple periodic oscillations are generally obtained for the BZ reaction in a batch (closed) system. However, complex oscillations have been observed for the BZ reaction in batch with malonic acid and either cerium or ferroin ions as the catalyst. We report here that fascinating complex oscillations in the potential of a Pt electrode have been found in the batch BZ reaction with methylmalonic acid (MeMA) and manganese(ii). Relatively high initial concentrations of NaBrO(3) and MeMA are required, and the [NaBrO(3)](0)/[MeMA](0) ratio is the main factor determining the type of oscillations obtained. Other relevant factors are [NaBr](0), [MnSO(4)](0), [H(2)SO(4)](0) or [NaOH](0), temperature, and stirring rate. Complex phenomena observed include mixed mode oscillations, birhythmicity, quasiperiodicity, bursting, and possible chaos. A mechanism is proposed involving the reversible formation of a manganese(iii) complex with bromomethylmalonic acid followed by two-electron oxidation to methyltartronic acid and Mn(2+). The Royal Society of Chemistry 2021-05-04 /pmc/articles/PMC9030520/ /pubmed/35479119 http://dx.doi.org/10.1039/d1ra01734a Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Frerichs, Glen A.
Yengi, Desmond
Complex oscillations in the Belousov–Zhabotinsky batch reaction with methylmalonic acid and manganese(ii)
title Complex oscillations in the Belousov–Zhabotinsky batch reaction with methylmalonic acid and manganese(ii)
title_full Complex oscillations in the Belousov–Zhabotinsky batch reaction with methylmalonic acid and manganese(ii)
title_fullStr Complex oscillations in the Belousov–Zhabotinsky batch reaction with methylmalonic acid and manganese(ii)
title_full_unstemmed Complex oscillations in the Belousov–Zhabotinsky batch reaction with methylmalonic acid and manganese(ii)
title_short Complex oscillations in the Belousov–Zhabotinsky batch reaction with methylmalonic acid and manganese(ii)
title_sort complex oscillations in the belousov–zhabotinsky batch reaction with methylmalonic acid and manganese(ii)
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9030520/
https://www.ncbi.nlm.nih.gov/pubmed/35479119
http://dx.doi.org/10.1039/d1ra01734a
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