pH oscillations and bistability in the methylene glycol-sulfite- gluconolactone reaction
pH oscillations and bistability in the methylene glycol-sulfite- gluconolactone reaction
The Methylene glycol–Sulfite–Gluconolactone (MGSG) reaction is the first example of an organic-based pH oscillator. This reaction is of particular interest as it displays large amplitude oscillations in hydroxide ion accompanied by small amplitude (10–3 V) oscillations in potential, indicating that it is not driven by redox processes. We investigate the reaction in a batch (closed) and flow (open) reactor and examine the role of the aging of the gluconolactone stock solution. The system is found to display oscillations and bistability for a wide range of flow rates and initial compositions. The experimental results are reproduced in numerical simulations in an extended model of the reaction in which the decay of the stock solution is incorporated. Finally, we analyse the features of the reaction that make it a suitable basis for the development of novel pH oscillators.
3711-3716
Kovacs, Klara
b6ee9b2a-87b9-458d-b42b-9da62c637bf7
McIlwaine, Rachel E.
d6ab6441-ab31-4d20-be4d-bbf0a93b9f8d
Scott, Stephen K.
2ea11f47-c715-45ec-941e-c9be83d52057
Taylor, Annette F.
08028a29-428d-4732-b6b1-f7a93389b386
22 May 2007
Kovacs, Klara
b6ee9b2a-87b9-458d-b42b-9da62c637bf7
McIlwaine, Rachel E.
d6ab6441-ab31-4d20-be4d-bbf0a93b9f8d
Scott, Stephen K.
2ea11f47-c715-45ec-941e-c9be83d52057
Taylor, Annette F.
08028a29-428d-4732-b6b1-f7a93389b386
Kovacs, Klara, McIlwaine, Rachel E., Scott, Stephen K. and Taylor, Annette F.
(2007)
pH oscillations and bistability in the methylene glycol-sulfite- gluconolactone reaction.
Physical Chemistry Chemical Physics, 9 (28), .
(doi:10.1039/b704407k).
Abstract
The Methylene glycol–Sulfite–Gluconolactone (MGSG) reaction is the first example of an organic-based pH oscillator. This reaction is of particular interest as it displays large amplitude oscillations in hydroxide ion accompanied by small amplitude (10–3 V) oscillations in potential, indicating that it is not driven by redox processes. We investigate the reaction in a batch (closed) and flow (open) reactor and examine the role of the aging of the gluconolactone stock solution. The system is found to display oscillations and bistability for a wide range of flow rates and initial compositions. The experimental results are reproduced in numerical simulations in an extended model of the reaction in which the decay of the stock solution is incorporated. Finally, we analyse the features of the reaction that make it a suitable basis for the development of novel pH oscillators.
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Accepted/In Press date: 30 April 2007
Published date: 22 May 2007
Identifiers
Local EPrints ID: 499404
URI: http://eprints.soton.ac.uk/id/eprint/499404
ISSN: 1463-9076
PURE UUID: 18736325-282e-4e8d-a85a-3897303d151b
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Date deposited: 19 Mar 2025 17:31
Last modified: 20 Mar 2025 03:12
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Author:
Klara Kovacs
Author:
Rachel E. McIlwaine
Author:
Stephen K. Scott
Author:
Annette F. Taylor
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