Chemomechanical Motion of a Self-Oscillating Gel in a Protic Ionic Liquid
Chemomechanical Motion of a Self-Oscillating Gel in a Protic Ionic Liquid
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自振荡凝胶在质子离子液体中的化学机械运动
DOI：
10.1002/anie.201809413
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Yoshida Ryo
中科院分区：
文献类型：
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作者：
Masuda Tsukuru;Ueki Takeshi;Tamate Ryota;Matsukawa Ko;Yoshida Ryo
以水合质子离子液体（PIL）为质子源，研究了聚合物凝胶在Belousov-Zhabotinsky （BZ）反应中的自主膨胀-膨胀振荡。硫酸氢甲铵（[maH+][HSO4−]）在BZ反应中提供稳定的氧化还原振荡，因此被用作PIL。由于BZ反应的pKafor [maH+][HSO4−]明显高于传统质子源，因此在弱酸性条件下可以预期化学力学振荡。该自振荡聚合物是由N‐异丙基丙烯酰胺、N‐（3‐氨基丙基）甲基丙烯酰胺和Ru(bpy)3片段作为BZ反应催化剂组成的三元无规共聚物。该共聚物在含有nabro3和丙二酸的水合[maH+][HSO4−]中表现出自发的可溶-不溶振荡。用共价连接的微凝胶制备了多孔体凝胶，并观察了其宏观胀胀振荡。
An autonomous swelling–deswelling oscillation of polymer gels in a hydrated protic ionic liquid (PIL) as a proton source for the Belousov–Zhabotinsky (BZ) reaction is presented. Methylammonium hydrogen sulfate ([maH+][HSO4−]) was employed as the PIL because it provides stable redox oscillation in the BZ reaction. Due to the significantly higher pKafor [maH+][HSO4−] than those for conventional proton sources for the BZ reaction, chemomechanical oscillation can be expected under weaker acidic conditions. The self‐oscillating polymer was designed as a ternary random copolymer ofN‐isopropylacrylamide,N‐(3‐aminopropyl)methacrylamide, and the Ru(bpy)3moiety as a catalyst for the BZ reaction. The copolymer exhibited spontaneous soluble–insoluble oscillation in hydrated [maH+][HSO4−] containing NaBrO3and malonic acid. Macroscopic swelling–deswelling oscillation of the porous bulk gel prepared by covalently connecting microgel particles was also observed.