通过倾斜互贯构建 2D hcb 网络的 3D 共价有机框架。
Constructing a 3D Covalent Organic Framework from 2D hcb Nets through Inclined Interpenetration.
机构信息
College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, People's Republic of China.
School of Physical Science and Technology and Shanghai Key Laboratory of High-Resolution Electron Microscopy, ShanghaiTech University, Shanghai 201210, People's Republic of China.
出版信息
J Am Chem Soc. 2023 Jun 28;145(25):13537-13541. doi: 10.1021/jacs.3c03699. Epub 2023 Jun 20.
Three-dimensional covalent organic frameworks (3D COFs) have been of great interest due to their inherent numerous open sites and pore confinement effect. However, it has remained challenging to build 3D frameworks via interdigitation (also known as inclined interpenetration) by generating an entangled network formed by multiple 2D layers inclined with respect to each other. Herein, we report the first case of constructing a 3D COF, termed COF-904, through interdigitating 2D hcb nets, which was formed via [3+2] imine condensation reactions by the use of 1,3,5-triformylbenzene and 2,3,5,6-tetramethyl-1,4-phenylenediamine. The single-crystal structure of COF-904 is solved, and the locations of all non-hydrogen atoms are determined by 3D electron diffraction with a resolution up to 0.8 Å. These results not only broaden the strategy for achieving 3D COFs via interdigitation but also demonstrate that structurally complex extended frameworks can arise from simple molecules.
三维共价有机骨架（3D COFs）因其固有大量的开放位点和孔约束效应而受到极大关注。然而，通过生成由多个相对于彼此倾斜的二维层形成的缠结网络来构建 3D 框架仍然具有挑战性。在此，我们报道了首例通过互穿二维 hcb 网络构建 3D COF 的情况，称为 COF-904，该网络是通过使用 1,3,5-三醛基苯和 2,3,5,6-四甲基-1,4-苯二胺的[3+2]亚胺缩合反应形成的。COF-904 的单晶结构已被解析，所有非氢原子的位置均通过分辨率高达 0.8 Å 的三维电子衍射确定。这些结果不仅拓宽了通过互穿获得 3D COFs 的策略，还表明结构复杂的扩展框架可以源自简单的分子。
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