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Nonlinear Dynamics in the Uncatalyzed Bromate–Pyrocatechol Reaction

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Published/Copyright: September 25, 2009
Zeitschrift für Physikalische Chemie
From the journal Zeitschrift für Physikalische Chemie Volume 222 Issue 7

Abstract

Spontaneous chemical oscillations are uncovered in the uncatalyzed bromate–pyrocatechol reaction conducted in a stirred batch reactor. Phase diagrams show that the oscillatory behavior is more sensitive to the ratio of [bromate]/[pyrocatechol] than their actual concentrations. The long induction time observed in the system is insensitive to the initial presence of brominated pyrocatechol species. Quenching experiments illustrate that the studied chemical oscillator is both bromide and radical controlled. In addition, this new uncatalyzed bromate oscillator exhibits both light-induced and light-quenched oscillatory behaviors. Preliminary mechanistic characterization with UV/vis absorption method and mass spectrometry suggests the formation of bromo-1,2-benzoquinone through the reaction between pyrocatechol and bromine.

Keywords: Chemical Oscillations; Nonlinear Dynamics; Perturbation; Photochemistry; Reaction Mechanism
* Correspondence address: University of Windsor, Dept of Chemistry, OntarioN9B 3P4, Kanada,
Published Online: 2009-9-25
Published in Print: 2008-7-1

© by Oldenbourg Wissenschaftsverlag, München, Germany

Articles in the same Issue

  1. Fluorescence Quenching of Meso-Tetrakis(p-Sulfonatophenyl)Porphyrin (TSPP) by certain Organic Dyes
  2. Nonlinear Dynamics in the Uncatalyzed Bromate–Pyrocatechol Reaction
  3. A Study on the Fluorescence Quenching of Eosin by certain Organic Dyes
  4. Structural Investigations on Nanocomposite Mixed Metal Oxide Powders Used in Surface Catalysis
  5. Solvation Behaviour of some Copper (I), Silver (I) and Tetraalkylammonium Salts in Actonitrile + Adiponitrile Mixtures
  6. Mechanisms of Dipolar Ortho/Para-H2O Conversion in Ice
  7. Thermodynamic and Transport Behavior of Binary Liquid Mixtures of 1-Decanol with Hexadecane and Squalane at 298.15, 303.15 and 308.15 K
  8. Experimental and Quantum Chemical Study of the Oxidation Mechanism of CF2CFBr by O2
https://doi.org/10.1524/zpch.2008.5251
Keywords for this article
Chemical Oscillations; Nonlinear Dynamics; Perturbation; Photochemistry; Reaction Mechanism

Articles in the same Issue

  1. Fluorescence Quenching of Meso-Tetrakis(p-Sulfonatophenyl)Porphyrin (TSPP) by certain Organic Dyes
  2. Nonlinear Dynamics in the Uncatalyzed Bromate–Pyrocatechol Reaction
  3. A Study on the Fluorescence Quenching of Eosin by certain Organic Dyes
  4. Structural Investigations on Nanocomposite Mixed Metal Oxide Powders Used in Surface Catalysis
  5. Solvation Behaviour of some Copper (I), Silver (I) and Tetraalkylammonium Salts in Actonitrile + Adiponitrile Mixtures
  6. Mechanisms of Dipolar Ortho/Para-H2O Conversion in Ice
  7. Thermodynamic and Transport Behavior of Binary Liquid Mixtures of 1-Decanol with Hexadecane and Squalane at 298.15, 303.15 and 308.15 K
  8. Experimental and Quantum Chemical Study of the Oxidation Mechanism of CF2CFBr by O2
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