Photoinduced Oscillations and Pulse Waves in the Hydrogen Peroxide-Sulfite-Ferrocyanide Reaction
Photoinduced Oscillations and Pulse Waves in the Hydrogen Peroxide-Sulfite-Ferrocyanide Reaction
复制标题
过氧化氢-亚硫酸盐-亚铁氰化物反应中的光致振荡和脉冲波
DOI：
10.1021/acs.jpca.7b10025
复制
发表时间：
2018-02-08
影响因子：
2.9
通讯作者：
Gao, Qingyu
中科院分区：
文献类型：
--
作者：
Liu, Yang;Yuan, Ling;Gao, Qingyu
双氧水-亚硫酸盐-亚铁氰化物反应在脉冲光照射下表现出优异的光敏性，可用于有效地控制非线性化学系统的时空动力学。在这里，我们通过整合两个分别描述振荡和光敏行为的模型来数值模拟光诱导的pH振荡。利用光照可以获得从低ph稳态到振荡的动态转变。根据仿真结果，通过低pH稳态激发，在光照下实验获得了振荡动力学。在反应扩散介质中，在合适的酸浓度和光照条件下，观察到相应的多重脉冲波。因此，光照可以有效地用于调整pH动态系统中的模式形成。特别地，与均匀体系的动力学相比，观察表明扩散促进了凝胶反应器中的局部振荡和脉冲波。
The hydrogen peroxide-sulfite-ferrocyanide reaction shows excellent photosensitivity under pulse light illumination, which can be used to efficiently control the spatiotemporal dynamics of the nonlinear chemical system. Here, we numerically simulated the photoinduced pH oscillations by integrating two models that describe the oscillatory and photosensitive behaviors, respectively. A dynamic transition from the low-pH steady state to oscillations can be obtained using light illumination. In accordance with the simulation results, oscillatory dynamics was experimentally obtained under light illumination through excitation of a low pH steady state. In the reaction-diffusion medium, corresponding multiple pulse waves were observed under suitable acid concentration and illumination conditions. Hence, light illumination can be efficiently employed to tune pattern formation in pH dynamic systems. Especially, the observation indicates that the local oscillations and pulse waves were promoted by diffusion in the gel reactor when comparing with dynamics in a homogeneous system.