Pekala Katarzyna, Jurczakowski Rafał, Lewera Adam, Orlik Marek
Laboratory of Electroanalytical Chemistry, University of Warsaw, ul. Pasteura 1, 02-093 Warsaw, Poland.
J Phys Chem A. 2007 May 10;111(18):3439-42. doi: 10.1021/jp070656f. Epub 2007 Apr 17.
The oscillatory oxidation of thiocyanate ions with hydrogen peroxide, catalyzed by Cu2+ ions in alkaline media, was so far observed as occurring simultaneously in the entire space of the batch or flow reactor. We performed this reaction for the first time in the thin-layer reactor and observed the spatiotemporal course of the above process, in the presence of luminol as the chemiluminescent indicator. A series of luminescent patterns periodically starting from the random reaction center and spreading throughout the entire solution layer was reported. For a batch-stirred system, the bursts of luminescence were found to correlate with the steep decreases of the oscillating Pt electrode potential. These novel results open possibilities for further experimental and theoretical investigations of those spatiotemporal patterns, including studies of the mechanism of this chemically complex process.
在碱性介质中，由铜离子催化的硫氰酸根离子与过氧化氢的振荡氧化反应，迄今观察到在间歇式或流动式反应器的整个空间中同时发生。我们首次在薄层反应器中进行了该反应，并在鲁米诺作为化学发光指示剂的情况下，观察了上述过程的时空进程。报道了一系列从随机反应中心开始并在整个溶液层中传播的发光图案。对于间歇搅拌系统，发现发光猝发与振荡铂电极电位的急剧下降相关。这些新结果为进一步对那些时空图案进行实验和理论研究开辟了可能性，包括对这个化学复杂过程的机理研究。
