We have developed a novel polymer brush surface exhibiting autonomous swelling–deswelling changes driven by the Belousov–Zhabotinsky (BZ) reaction, that is, the self-oscillating polymer brush. In this system, the ruthenium tris(2,2′-bipyridine) [Ru(bpy)₃] catalyst-conjugated polymer chains are densely packed on the solid substrate. It is expected that the BZ reaction in the polymer brush would be influenced by the immobilization effect of the catalyst. To clarify the effect of the immobilization of the catalyst on the self-oscillating polymer brush, the self-oscillating behavior of the polymer brush was investigated by comparing it with that of other self-oscillating polymer materials, the free polymer, and the gel particle under various initial substrate concentrations. The initial substrate dependency of the oscillating period for the polymer brush was found to be different from those for the free polymer and the gel particle. Furthermore, the oscillatory waveform was analyzed on the basis of the Field–Körös–Noyes model. These investigations revealed that the dense immobilization of the self-oscillating polymer on the surface restricted accessibility for the Ru(bpy)₃ moiety. These findings would be helpful in understanding the reaction–diffusion mechanism in the polymer brush, which is a novel reaction medium for the BZ reaction.

中文翻译：

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自振荡聚合物刷内部的Belousov-Zhabotinsky反应的各个方面

我们开发了一种新型的聚合物刷表面，该表面表现出由Belousov-Zhabotinsky（BZ）反应驱动的自发溶胀-溶胀变化，即自激振动聚合物刷。在该系统中，钌三（2,2'-联吡啶）[Ru（bpy）₃]催化剂共轭的聚合物链紧密地堆积在固体基质上。预期聚合物刷中的BZ反应将受到催化剂的固定作用的影响。为了阐明催化剂固定化对自振荡聚合物刷的影响，通过与其他自振荡聚合物材料，游离聚合物和凝胶颗粒的比较，研究了聚合物刷的自振荡行为。在各种初始底物浓度下 发现聚合物刷的振荡周期的初始衬底依赖性与游离聚合物和凝胶颗粒的振荡周期的初始衬底依赖性不同。此外，根据Field–Körös–Noyes模型分析了振荡波形。₃部分。这些发现将有助于理解聚合物刷中的反应扩散机理，而聚合物刷是BZ反应的新型反应介质。