Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (01): 99-109.doi: 10.3866/PKU.WHXB20100113

• PHOTOCHEMISTRY AND SPECTROSCOPY • Previous Articles     Next Articles

Design of Photo-Controlled Chemical Oscillators

AMEMIYA Takashi, WANG Jichang   

  1. Graduate School of Environment and Information Sciences, Yokohama National University, Yokohama 240-8501, Japan; Department of Chemistry and Biochemistry, University of Windsor, Ontario, N9B 3P4, Canada
  • Received:2009-08-31 Revised:2009-10-17 Published:2009-12-29
  • Contact: AMEMIYA Takashi, WANG Jichang;


This article reviewed recent progresses in the design of a new class of chemical oscillators and developed a generic model that could qualitatively reproduce those photochemical oscillations seen in experiments. The two oscillators discussed in this report are based on the photolysis of 1,4-benzoquinone and its derivatives, in which external illumination is vital in initiating and sustaining the reaction processes. Nonlinear behavior in these two photo-controlled chemical oscillators are analyzed as a function of light intensity and the initial concentration of reagents including 1,4-benzoquinone, 1,4-hydroquinone, 2-methyl-1,4-benzoquinone, bromate, and sulfuric acid. A generic model proposed initially for the uncatalyzed bromate-aromatic compound reactions was modified here to account for the photolysis of 1,4-benzoquinone or 2-methyl-1,4-benzoquinone. The modified model qualitatively reproduced chemical oscillations and their dependence on light intensity.

Key words: Autocatalytic reaction, Chemical oscillation, Nonlinear feedback, Photochemistry


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