Comparative study of chemical waves and temporal oscillations in the Ru(bpy)_3~(2+) -catalyzed photosensitive Belousov-Zhabotinsky reaction

摘要

Properties of the chemical waves emerging from the mask edge were investigated for the Ru(bpy)_3~(2+) -catalyzed Belousov-Zhanbotinsky 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 monotonously with [MA]_0. The obtained results were qualitatively interpreted based on the temporal oscillations measured in a batch reactor. A key effect caused by increasing [MA]_0 was identified to be the enhancement of the reduction rate of Ru(bpy)_3~(3+).