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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Dynamics and Mechanism of Bromate Oscillators with 1,4-Cyclohexanedione
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Dynamics and Mechanism of Bromate Oscillators with 1,4-Cyclohexanedione

机译：1,4-环己二酮溴酸盐振荡器的动力学及机理

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摘要

Experimental and numerical studies of the temporal behavior of the acidic bromate-1,4-cyclohexanedione batch reaction in the presence of Ce(SO_4)_2, MnSO_4, or Ru(bipy)_3SO_4 catalyst are reported. With increasing concentration of catalyst and at [H_2SO_4] ≤1 mol/dm~3 these systems show the following bifurcation sequences: uncatalyzed oscillations → clock reaction (with excitability) → catalyzed oscillations, while at [H_2SO_4] ≥1.5 mol/cm~3 the sequence is uncatalyzed oscillations → catalyzed oscillations. A chemical mechanism based on kinetic measurements of some component reactions is suggested and used to simulate the experimentally found bifurcation sequences and the monotomic and nonmonotonic recovery of the system after perturbation of the excitable state. A reduced model for the bromate-CHD-catalyst system is developed and analyzed.
机译：报道了在Ce（SO_4）_2，MnSO_4或Ru（bipy）_3SO_4催化剂存在下酸性溴酸盐-1,4-环己二酮间歇反应时间行为的实验和数值研究。当[H_2SO_4]≤1.5mol / cm〜3时，随着催化剂浓度的增加和[H_2SO_4]≤1mol / dm〜3，这些系统显示出以下分叉序列：未催化振荡→时钟反应（具有兴奋性）→催化振荡。顺序为未催化振荡→催化振荡。提出了基于某些组分反应的动力学测量的化学机理，并用于模拟实验发现的分叉序列以及扰动可激发态后系统的单调和非单调恢复。开发并分析了溴酸盐-CHD催化剂体系的简化模型。

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