Belousov-Zhabotinsky reaction

q Properties of the chemical waves emerging from the mask edge were investigated for the Ru bpy -catalyzed 3 wx . Belousov-Zhabotinsky reaction under steady illumination while varying the initial concentration of malonic acid MA 0 systematically. The wave velocity, the wavelength and the thickness of the oxidized band were found to decrease wx monotonously with MA . The obtained results were qualitatively interpreted based on the temporal oscillations measured in 0 wx a batch reactor. A key effect caused by increasing MA was identified to be the enhancement of the reduction rate of 0 . 3q Ru bpy . q 2000 Published by Elsevier Science B.V. 3