Control of the chlorine dioxide-iodine-malonic acid oscillating reaction by illumination
                         Munuzuri AP, Dolnik M, Zhabotinsky AM, Epstein IR
                      JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
                                 121 (35): 8065-8069 SEP 8 1999
Abstract:
We show that illumination of the chlorine dioxide-iodine-malonic acid reaction with visible light suppresses oscillations and
shifts the steady state of the reaction to lower concentrations of iodide ions. In the system with starch, illumination results in
a strong decrease of the steady-state concentration of the triiodide-starch complex. We suggest a simple mechanism, in
which iodine atoms produced by photodissociation of molecular iodine initiate reduction of chlorine dioxide to chlorite and
oxidation of iodide ions to iodine. This results in a decreased amplitude of oscillations and, at more intense illumination, the
cessation of oscillations. Illumination also lowers the steady-state concentrations of iodide and the triiodide-starch
complex. Results obtained from numerical simulations are in good agreement with the experimental data.