Max Planck Institute for Solid State Research, Heisenbergstraße 1, 70569 Stuttgart, Germany.
Department of Chemistry, Ludwig-Maximilians-Universität (LMU), Butenandtstraße 5-13, 81377 Munich, Germany.
J Am Chem Soc. 2023 Jun 21;145(24):13241-13248. doi: 10.1021/jacs.3c02572. Epub 2023 May 25.
Herein, we report a facile postsynthetic linkage conversion method giving synthetic access to nitrone-linked covalent organic frameworks (COFs) from imine- and amine-linked COFs. The new two-dimensional (2D) nitrone-linked covalent organic frameworks, NO-PI-3-COF and NO-TTI-COF, are obtained with high crystallinity and large surface areas. Nitrone-modified pore channels induce condensation of water vapor at 20% lower humidity compared to their amine- or imine-linked precursor COFs. Thus, the topochemical transformation to nitrone linkages constitutes an attractive approach to postsynthetically fine-tune water adsorption properties in framework materials.
在此，我们报告了一种简便的后合成链接转换方法，可从亚胺和胺连接的 COF 中获得氮氧自由基连接的共价有机骨架 (COF)。新的二维 (2D) 氮氧自由基连接的共价有机骨架，NO-PI-3-COF 和 NO-TTI-COF，具有高结晶度和大表面积。与它们的胺或亚胺连接前体 COF 相比，氮氧自由基修饰的孔道诱导水蒸气在 20%更低的湿度下冷凝。因此，拓扑化学转化为氮氧自由基链接构成了一种有吸引力的方法，可以在后合成中微调骨架材料的水吸附性能。
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