Issue 8, 2002
From the journal:

Physical Chemistry Chemical Physics

Chemically induced oscillations in a pH-responsive hydrogel

Colin J. Crook,a   Andrew Smith,a   Richard A. L. Jonesb  and  Anthony J. Ryan*a  

* Corresponding authors

a Department of Chemistry, University of Sheffield, Sheffield, UK
E-mail: tony.ryan@sheffield.ac.uk
Fax: +44 (0)114 2738673
Tel: +44 (0)114 2738673

b Department of Physics, University of Sheffield, Sheffield, UK
E-mail: r.a.l.jones@sheffield.ac.uk
Fax: +44 (0)114 2728079
Tel: +44 (0)114 2224530

Abstract

A Landolt pH-oscillator based on a bromate/sulfite/ferrocyanide reaction has been developed with a room temperature period of 20 min and a range of 3.1 ≤ pH ≤ 7.0. This system has been used to drive periodic oscillations in volume in a pH responsive hydrogel. The gel is coupled to the reaction and changes volume by a factor of at least 6. A continuously stirred, constant volume, tank reactor was set-up on an optical microscope and the reaction pH and gel size monitored.

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Article information

DOI
https://doi.org/10.1039/B109977A
Article type
Paper
Submitted
01 Nov 2001
Accepted
24 Jan 2002
First published
18 Mar 2002

Phys. Chem. Chem. Phys., 2002,4, 1367-1369

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Chemically induced oscillations in a pH-responsive hydrogel

C. J. Crook, A. Smith, R. A. L. Jones and A. J. Ryan, Phys. Chem. Chem. Phys., 2002, 4, 1367 DOI: 10.1039/B109977A

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