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DY: Fachverband Dynamik und Statistische Physik

DY 40: Poster - Quantum Systems/ Stat. Phys./ Diffusive Process

DY 40.33: Poster

Donnerstag, 3. April 2014, 17:00–19:00, P3

Light sensitivity of Belousov-Zhabotinsky reaction with 1,4-cyclohexanedione as the organic substrate — Andreas Bindler and •Stefan C. Müller — Institute of Experimental Physics, Otto-von-Guericke-Universität Magdeburg

The study of spatio-temporal patterns in chemically reactive systems is one of the central problems of modern reaction kinetics. A well-known experimental model system is the Belousov-Zhabotinsky (BZ) reaction, which exhibits oscillations and chemical waves. In a photosensitive Ru-catalyzed version of this reaction light can act as an external control of various features of such patterns. Recent work is focused on the light-sensitivity of 1,4-cyclohexadione (CHD) as a new substrate, which has particular advantages and specific properties of interest. We study the influence of CHD and its intermediates on the kinetics of the BZ-reaction and on other chemical reagents like the catalyst or bromide. The response to illumination of the BZ-reaction with CHD is much more complex, compared with the previously investigated light-sensitive reaction including Ruthenium and malonic acid as the substrate. Thus, we have investigated the pattern evolution in the presence of CHD and different catalysts. A major goal is to determine, how the interaction between CHD and Ruthenium under irradiation in the visible spectrum can be minimized.