The Briggs-Rauscher Reaction: A Demonstration of Sequential Spatiotemporal Patterns
The Briggs-Rauscher Reaction: A Demonstration of Sequential Spatiotemporal Patterns
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布里格斯·劳舍尔反应：顺序时空模式的演示
DOI：
10.1021/acs.jchemed.0c00892
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发表时间：
2021-02-09
影响因子：
3
通讯作者：
Gao, Qingyu
中科院分区：
文献类型：
--
作者：
Li, Zhuoxuan;Yuan, Ling;Gao, Qingyu
Briggs -Rauscher反应是一种流行的反应-扩散-对流模式演示，用于说明实验室，教室和公共研讨会中的化学振荡，因为它简单且具有视觉吸引力。在这里，我们采用Briggs-Rauscher反应来呈现本科普通化学或物理化学实验室的反应-扩散-对流模式。在无盖的培养皿中，将丙二酸与碘酸钾的浓度之比保持在0.2，可以观察到由反应、扩散和对流相互作用诱导的序列模式（瞬态枝晶模式和旋转枝晶模式）。这个美丽的演示吸引了学生的注意力，激发了对自然界中类似现象的反思和讨论，以及远离平衡的系统中的丰富行为。
The Briggs -Rauscher reaction is a popular Reaction-Diffusion-Convection Patterns demonstration to illustrate chemical oscillations in laboratories, classrooms, and public seminars because of its simplicity and visual appeal. Here, we adapt the Briggs-Rauscher reaction to present reaction-diffusion-convection patterns in the undergraduate general or physical chemistry laboratory. By maintaining the ratio between malonic acid and potassium iodate concentrations as 0.2 in an uncovered Petri dish, sequential patterns (transient dendritic patterns and rotating dendritic patterns) can be observed, which are induced by the interaction of reaction, diffusion, and convection. This beautiful demonstration captures students' attention and inspires reflection and discussion about similar phenomena in nature as well as the wealth of behaviors in systems far from equilibrium.