The Belousov–Zhabotinsky Reaction in Thermoresponsive Core–Shell Hydrogel Microspheres with a Tris(2,2′-bipyridyl)ruthenium Catalyst in the Core
| العنوان: | The Belousov–Zhabotinsky Reaction in Thermoresponsive Core–Shell Hydrogel Microspheres with a Tris(2,2′-bipyridyl)ruthenium Catalyst in the Core |
|---|---|
| المؤلفون: | Ryo Yoshida, Takumi Watanabe, Haruka Minato, Keito Ishikawa, Daisuke Suzuki, Kohei Inui, Shusuke Matsui |
| المصدر: | The Journal of Physical Chemistry B. 124:3828-3835 |
| بيانات النشر: | American Chemical Society (ACS), 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Materials science, 010304 chemical physics, Oscillation, chemistry.chemical_element, 010402 general chemistry, 01 natural sciences, Redox, 0104 chemical sciences, Surfaces, Coatings and Films, Catalysis, Ruthenium, Bipyridine, chemistry.chemical_compound, Colloid, Belousov–Zhabotinsky reaction, chemistry, Chemical engineering, 0103 physical sciences, Materials Chemistry, Precipitation polymerization, Physical and Theoretical Chemistry |
| الوصف: | The Belousov-Zhabotinsky (BZ) reaction shows temporal or spatiotemporal structures such as redox oscillation of the catalyst, [ruthenium(II)tris(2,2'-bipyridine)][PF6]2 ([Ru(bpy)3][PF6]2). In this study, autonomously oscillating hydrogel microspheres (microgels) were investigated, which show swelling/deswelling oscillation induced by the redox oscillation of the BZ reaction inside the gel. Despite the periodically and autonomously induced oscillation that does not require an external stimulus, it has not been possible to perform any manipulation of the oscillatory behavior over time. The results of the present study show that it is possible to reversibly switch the microgel oscillations from an "on" active state of the BZ reaction to an "off" inactive state by changing the temperature in combination with thermoresponsive microgels. To realize on-demand switching, the construction of double-shell structures is crucial; the thermoresponsive first shell allows the microgels to modulate the diffusion of the substrates or intermediates in the BZ reaction, while the second shell maintains colloidal stability under high temperatures and high ion concentrations. The functionalized double-shell microgels were prepared via multistep seeded precipitation polymerization. The oscillatory switching behavior of the BZ reaction was observed directly and evaluated by ultraviolet-visible (UV-vis) spectroscopy. The central concept of this study, i.e., "on-off switching" can be expected to benefit the development of advanced bioinspired materials. |
| تدمد: | 1520-5207 1520-6106 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c3b4f37a6b7d2c031955e790dc490753 https://doi.org/10.1021/acs.jpcb.0c02238 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi.dedup.....c3b4f37a6b7d2c031955e790dc490753 |
| قاعدة البيانات: | OpenAIRE |
Find this issue from the American Chemical Society | تدمد: | 15205207 15206106 |
|---|