大孔结晶聚酰亚胺共价有机骨架的设计合成。
Designed synthesis of large-pore crystalline polyimide covalent organic frameworks.
机构信息
Department of Chemical and Biomolecular Engineering, Center for Catalytic Science and Technology, University of Delaware, Newark Delaware 19716, USA.
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, China.
出版信息
Nat Commun. 2014 Jul 23;5:4503. doi: 10.1038/ncomms5503.
Covalent organic frameworks (COFs) are an emerging class of porous crystalline polymers with a wide variety of applications. They are currently synthesized through only a few chemical reactions, limiting the access and exploitation of new structures and properties. Here we report that the imidization reaction can be used to prepare a series of polyimide (PI) COFs with pore size as large as 42 × 53 Å(2), which is among the largest reported to date, and surface area as high as 2,346 m(2) g(-1), which exceeds that of all amorphous porous PIs and is among the highest reported for two-dimensional COFs. These PI COFs are thermally stable up to 530 °C. We also assemble a large dye molecule into a COF that shows sensitive temperature-dependent luminescent properties.
共价有机框架（COFs）是一类新兴的多孔结晶聚合物，具有广泛的应用。目前，它们只能通过少数几种化学反应来合成，这限制了对新结构和性质的探索和利用。在这里，我们报告说，酰亚胺化反应可用于制备一系列具有高达 42×53Å(2)的孔径的聚酰亚胺（PI）COFs，这是迄今为止报道的最大孔径之一，比所有无定形多孔 PI 的比表面积都要高，达到 2346m(2)g(-1)，也是二维 COFs 中报道的最高比表面积之一。这些 PI COFs 在高达 530°C 的温度下稳定。我们还将一个大染料分子组装成 COF，它表现出对温度敏感的发光性能。
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