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Citation: AMEMIYA Takashi, WANG Jichang. Design of Photo-Controlled Chemical Oscillators[J]. Acta Physico-Chimica Sinica, ;2010, 26(01): 99-109. doi: 10.3866/PKU.WHXB20100113 shu

Design of Photo-Controlled Chemical Oscillators

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 Date: 31 August 2009
Available Online: 20 November 2009

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.
- Autocatalytic reaction,
- Chemical oscillation,
- Nonlinear feedback,
- Photochemistry
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