Stable and ordered amide frameworks synthesised under reversible conditions which facilitate error checking.

Stable and ordered amide frameworks synthesised under reversible conditions which facilitate error checking.
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DOI:
10.1038/s41467-017-01423-5
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发表时间:
2017-10-24
影响因子:
16.6
通讯作者:
Rosseinsky MJ
Rosseinsky MJ
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Stewart D;Antypov D;Dyer MS;Pitcher MJ;Katsoulidis AP;Chater PA;Blanc F;Rosseinsky MJ

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Covalent organic frameworks (COFs) are network polymers with long-range positional order whose properties can be tuned using the isoreticular chemistry approach. Making COFs from strong bonds is challenging because irreversible rapid formation of the network produces amorphous materials with locked-in disorder. Reversibility in bond formation is essential to generate ordered networks, as it allows the error-checking that permits the network to crystallise, and so candidate network-forming chemistries such as amide that are irreversible under conventional low temperature bond-forming conditions have been underexplored. Here we show that we can prepare two- and three-dimensional covalent amide frameworks (CAFs) by devitrification of amorphous polyamide network polymers using high-temperature and high-pressure reaction conditions. In this way we have accessed reversible amide bond formation that allows crystalline order to develop. This strategy permits the direct synthesis of practically irreversible ordered amide networks that are stable thermally and under both strong acidic and basic hydrolytic conditions. Irreversible bond formation in covalent organic frameworks leads to amorphous materials. Here, the authors show that crystalline and ultra-stable covalent amide frameworks can be accessed by devitrification of amorphous polyamide networks.
具有三角形拓扑结构的晶体超明极共价有机框架的合理设计。
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