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Magnetic Resonance Imaging of the Manipulation of a Chemical Wave Using an Inhomogeneous Magnetic Field

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Robert Evans,^†^‡ Christiane R. Timmel,^†^‡ P. J. Hore,^‡ and Melanie M. Britton*^§

Contribution from the Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford OX1 3QR, U.K., Department of Chemistry, University of Oxford, Physical and Theoretical Chemistry Laboratory, South Parks Road, Oxford OX1 3QZ, U.K., Magnetic Resonance Research Centre, Department of Chemical Engineering, University of Cambridge, New Museums Site, Pembroke Street, Cambridge CB3 2RA, U.K., and School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K.

J. Am. Chem. Soc., 2006, 128 (22), pp 7309–7314

DOI: 10.1021/ja0608287

Publication Date (Web): May 16, 2006

Section:

Catalysis, Reaction Kinetics, and Inorganic Reaction Mechanisms

Abstract

The effects of applied magnetic fields on the traveling wave formed by the reaction of (ethylenediaminetetraacetato)cobalt(II) (Co(II)EDTA²^-) and hydrogen peroxide have been studied using magnetic resonance imaging (MRI) . It was found that the wave could be manipulated by applying pulsed magnetic field gradients to a sample contained in a vertical cylindrical tube in the 7.0 T magnetic field of the spectrometer. Transverse field gradients decelerated the propagation of the wave down the high-field side of the tube and accelerated it down the low-field side. This control of the wave propagation eventually promoted the formation of a finger on the low-field side of the tube and allowed the wave to be maneuvered within the sample tube. The origin of these effects is rationalized by considering the Maxwell stress arising from the combined homogeneous and inhomogeneous magnetic fields and the magnetic susceptibility gradient across the wave front.

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This article has been cited by 3 ACS Journal articles (3 most recent appear below).

Magnetic Field Effect on Chemical Wave Propagation from the Belousov–Zhabotinsky Reaction
Rika Nishikiori, Shotaro Morimoto, Yoshihisa Fujiwara, Akio Katsuki, Roman Morgunov, and Yoshifumi Tanimoto
The Journal of Physical Chemistry A2011 Article ASAP
- Magnetic Field Effect on Chemical Wave Propagation from the Belousov–Zhabotinsky Reaction
  Rika Nishikiori, Shotaro Morimoto, Yoshihisa Fujiwara, Akio Katsuki, Roman Morgunov, and Yoshifumi Tanimoto
  The Journal of Physical Chemistry A2011 Article ASAP
  Effects of magnetic field (maximum field, 4 and 93 T2 m–1) on the propagation speed of a chemical wavefront from the Belousov–Zhabotinsky reaction were studied in a thin glass tube. The downward and upward speed and the horizontal one are, respectively ...
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Effect of a Gradient Static Magnetic Field on an Unstirred Belousov−Zhabotinsky Reaction by Changing the Thickness of the Medium
Hideyuki Okano, Hiroyuki Kitahata and Daisuke Akai
The Journal of Physical Chemistry A2009 113 (13), 3061-3067
- Effect of a Gradient Static Magnetic Field on an Unstirred Belousov−Zhabotinsky Reaction by Changing the Thickness of the Medium
  Hideyuki Okano, Hiroyuki Kitahata and Daisuke Akai
  The Journal of Physical Chemistry A2009 113 (13), 3061-3067
  The anomalous chemical wave propagation of an unstirred Belousov−Zhabotinsky (BZ) reaction was observed under exposure to a gradient static magnetic field (SMF). The gradient SMF effect on the BZ reaction was investigated by increasing the thickness of ...
  Abstract | Full Text HTML | Hi-Res PDF | PDF w/ Links
Temperature Changes Visualization during Chemical Wave Propagation
Vladimir V. Zhivonitko, Igor V. Koptyug, and Renad Z. Sagdeev
The Journal of Physical Chemistry A2007 111 (20), 4122-4124
- Temperature Changes Visualization during Chemical Wave Propagation
  Vladimir V. Zhivonitko, Igor V. Koptyug, and Renad Z. Sagdeev
  The Journal of Physical Chemistry A2007 111 (20), 4122-4124
  Magnetic resonance imaging was used for two-dimensional temperature visualization of chemical waves propagation in the autocatalytic exothermal reaction of thiosulfate oxidation by chlorite. The technique presented is based on the temperature dependence ...
  Abstract | Full Text HTML | Hi-Res PDF | PDF w/ Links