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Bioinspired Mechanically Responsive Hydrogel upon Redox Mediated by Dynamic Coordination between Telluroether and Platinum Ions
Chemistry of Materials ( IF 7.2 ) Pub Date : 2020-02-17 , DOI: 10.1021/acs.chemmater.9b05375 Feng Li 1 , Xue Zhang 1 , Shuxian Hu 2 , Zhaoyue Lv 1 , Jigang Lv 1 , Wenting Yu 1 , Xihan Xu 1 , Dayong Yang 1
Chemistry of Materials ( IF 7.2 ) Pub Date : 2020-02-17 , DOI: 10.1021/acs.chemmater.9b05375 Feng Li 1 , Xue Zhang 1 , Shuxian Hu 2 , Zhaoyue Lv 1 , Jigang Lv 1 , Wenting Yu 1 , Xihan Xu 1 , Dayong Yang 1
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Inspired by natural lives, materials with switchable mechanical properties have been constructed by virtue of the development of dynamic chemistry. However, the limited dynamic reactions are hampering their further development. The progress in organotellurium chemistry brings opportunity to open new frontiers of dynamic reactions for fabrication of mechanically responsive materials. Herein, a bioinspired mechanically responsive hydrogel upon redox mediated by dynamic coordination between telluroether and platinum ions is reported. The low electronegativity and superior σ electron-donating capability of telluroether facilitate its coordination with Pt ions. Remarkably, the coordination interaction is highly redox-active. Telluroether can dissociate from Pt ions upon oxidation (e.g., H2O2) because the effect of the polar solvent dramatically reduces the thermodynamic activity of oxidized telluroether. In turn, the coordination interaction is easily regenerated via reduction (e.g., vitamin C) of oxidized telluroether. When the coordination system is introduced into the polymer network of a hydrogel via copolymerization of telluroether containing a monomer and N-hydroxyethylacrylamide, the hydrogel exhibits a switchable and regulatable microporous structure and mechanical strength upon redox stimuli by virtue of the dynamic coordination interaction between telluroether and Pt ions. This work provides a new set of dynamic coordination chemistry and a new strategy to prepare mechanically responsive hydrogel.
中文翻译：
碲醚与铂离子之间动态配位介导的氧化还原生物启发的机械响应水凝胶
受自然生命的启发，借助动态化学的发展，构造了具有可切换机械性能的材料。但是，有限的动态反应阻碍了它们的进一步发展。有机碲化学的进步为有机反应材料的制造打开了动态反应新领域的机会。本文中，报道了由碲醚和铂离子之间的动态配位介导的基于氧化还原的受生物启发的机械响应水凝胶。碲醚的低电负性和出色的σ电子给体能力有助于其与Pt离子的配位。值得注意的是，配位相互作用是高度氧化还原活性的。碲醚可以在氧化时与Pt离子解离（例如H 2 O 2），因为极性溶剂的作用大大降低了氧化碲醚的热力学活性。继而，配位相互作用通过氧化的碲醚的还原（例如维生素C）容易地再生。当配位体系通过含单体的碲醚与N-羟乙基丙烯酰胺的共聚作用引入到水凝胶的聚合物网络中时，由于碲醚与苯胺之间的动态配位相互作用，该水凝胶在氧化还原刺激下显示出可切换且可调节的微孔结构和机械强度。铂离子。这项工作提供了一套新的动态配位化学和新的策略来制备机械响应水凝胶。
更新日期：2020-02-17
中文翻译：
碲醚与铂离子之间动态配位介导的氧化还原生物启发的机械响应水凝胶
受自然生命的启发，借助动态化学的发展，构造了具有可切换机械性能的材料。但是，有限的动态反应阻碍了它们的进一步发展。有机碲化学的进步为有机反应材料的制造打开了动态反应新领域的机会。本文中，报道了由碲醚和铂离子之间的动态配位介导的基于氧化还原的受生物启发的机械响应水凝胶。碲醚的低电负性和出色的σ电子给体能力有助于其与Pt离子的配位。值得注意的是，配位相互作用是高度氧化还原活性的。碲醚可以在氧化时与Pt离子解离（例如H 2 O 2），因为极性溶剂的作用大大降低了氧化碲醚的热力学活性。继而，配位相互作用通过氧化的碲醚的还原（例如维生素C）容易地再生。当配位体系通过含单体的碲醚与N-羟乙基丙烯酰胺的共聚作用引入到水凝胶的聚合物网络中时，由于碲醚与苯胺之间的动态配位相互作用，该水凝胶在氧化还原刺激下显示出可切换且可调节的微孔结构和机械强度。铂离子。这项工作提供了一套新的动态配位化学和新的策略来制备机械响应水凝胶。
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