Five-Minute Mechanosynthesis of Hypercrosslinked Microporous Polymers,Chemistry of Materials

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Five-Minute Mechanosynthesis of Hypercrosslinked Microporous Polymers
Chemistry of Materials ( IF 7.2 ) Pub Date : 2020-08-06 , DOI: 10.1021/acs.chemmater.0c01726
Jet-Sing M. Lee ₁ , Takuya Kurihara ₁ , Satoshi Horike _{1,

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Affiliation

Designable porous materials have potential in a plethora of applications, but synthesis costs and strict reaction conditions limit their true commercialization. Herein, we show that hypercrosslinked polymers (HCPs) can be synthesized within minutes in a green, low-cost, mechanochemical route which avoids the use of traditional toxic solvents. Microporous HCPs were obtained in as little as 10 s, with optimum surface areas up to 782 m² g^–1 obtained in only 5 min and in quantitative yields for both Friedel–Crafts “knitting” and Scholl-coupling (SC) reactions. Liquid-assisted grinding of the SC model system resulted in higher porosity than the traditional solution-synthesized equivalent. ssNMR studies showed that a higher degree of polymerization was obtained from mechanosynthesis with the presence of a trace green solvent as a porogen resulting in such high porosity. This method allows a near limitless variety of highly porous polymers to be synthesized from an aromatic molecule within minutes.

中文翻译：

超交联微孔聚合物的五分钟机械合成

可设计的多孔材料在众多应用中都有潜力，但是合成成本和严格的反应条件限制了它们的真正商业化。本文中，我们表明，超交联聚合物（HCP）可以在几分钟内以绿色，低成本，机械化学途径合成，从而避免了使用传统的有毒溶剂。在短短10 s内即可获得微孔HCP，最佳表面积可达782 m ² g ^–1只需5分钟即可获得Friedel-Crafts“编织”反应和Scholl偶联（SC）反应的定量产率。与传统的溶液合成等效物相比，SC模型系统的液体辅助研磨导致更高的孔隙率。ssNMR研究表明，在存在微量绿色溶剂作为致孔剂的情况下，通过机械合成获得了更高的聚合度，从而导致了如此高的孔隙率。该方法允许在几分钟内由芳族分子合成几乎无限多种高度多孔的聚合物。

更新日期：2020-09-22

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