Institute of Chemistry, Eötvös Loránd University, Laboratory of Nonlinear Chemical Dynamics, P.O. Box 32, H-1518 Budapest 112, Hungary.
Phys Chem Chem Phys. 2011 Dec 7;13(45):20228-34. doi: 10.1039/c1cp22449b. Epub 2011 Oct 12.
Many pattern developments in nature are believed to result from the interplay between self-activated (bio)chemical processes and the diffusive transport of constituents. Though the details are difficult to work out, the relevance of reaction-diffusion processes is widely accepted in many aspects of biological development. Due to their easier manipulation and control, aqueous phase chemical reactions are commonly preferred to probe the patterning capacity of reaction-diffusion processes. Nonetheless, sustained patterns of such a type were observed only in reactions involving oxyhalogen compounds. We report on halogen free solution chemistry systems which lead to stationary or oscillatory spatiotemporal pH patterns. They are based on the acid autocatalytic oxidation of sulfite ions by hydrogen peroxide in combination with two significantly different proton consuming feedback reactions. Besides the chemical novelty, yet experimentally and even theoretically undocumented pattern dynamics are uncovered. This success, based on a well-defined method, further paves the way to the discovery of stationary patterns in delicate biochemical reactions.
许多自然模式的发展被认为是自激活（生物）化学过程和成分的扩散传输之间相互作用的结果。尽管细节难以捉摸，但反应-扩散过程在生物发育的许多方面都得到了广泛的认可。由于其更容易操作和控制，水相化学反应通常更适合于探测反应-扩散过程的图案形成能力。尽管如此，只有在涉及卤氧化合物的反应中才观察到这种类型的持续图案。我们报告了无卤溶液化学系统，这些系统导致固定或振荡时空 pH 图案。它们基于亚硫酸盐离子在过氧化氢作用下的酸自催化氧化，同时结合两种显著不同的质子消耗反馈反应。除了化学新颖性之外，还揭示了实验上甚至理论上尚未记录的模式动力学。这种成功基于一种明确的方法，为在微妙的生化反应中发现固定模式进一步铺平了道路。
