Li Xing, Yadav Priya, Loh Kian Ping
Department of Chemistry, National University of Singapore, Singapore 117543, Singapore.
Chem Soc Rev. 2020 Jul 21;49(14):4835-4866. doi: 10.1039/d0cs00236d.
Covalent organic frameworks (COFs) are constructed from the precise integration of small organic blocks into an extended, porous framework via covalent linkages. COFs can also be viewed as an organic solid consisting of a periodic array of one dimensional (1-D) channels. Although a wide range of applications have been envisioned for COFs, understanding the structure-property correlation at the level of chemical linkages, topology, pore size and functionality is needed to unlock the potential of these materials. Herein, we review some emerging applications of two-dimensional (2D) COFs in solid-state photoluminescence, stimuli-responsive COFs, gas storage, ion conduction and energy storage, and discuss the intricate design principles that enable these COFs to perform better than their building blocks or polymeric counterparts. Going beyond bulk 2D-COFs, molecular thin organic layers called COFene can be derived from the exfoliation of 2D COFs, generating new properties for applications in optoelectronic devices, catalysis and separation.
共价有机框架（COFs）是通过共价键将小的有机砌块精确整合到一个扩展的多孔框架中构建而成的。COFs也可以被看作是一种由一维（1-D）通道的周期性阵列组成的有机固体。尽管人们已经设想了COFs的广泛应用，但需要在化学键、拓扑结构、孔径和功能层面上理解结构-性能的相关性，以释放这些材料的潜力。在此，我们综述二维（2D）COFs在固态光致发光、刺激响应型COFs、气体存储、离子传导和能量存储方面的一些新兴应用，并讨论使这些COFs比其构建块或聚合物对应物表现更好的复杂设计原则。除了块状二维COFs之外，称为COFene的分子薄有机层可以从二维COFs的剥离中获得，从而产生用于光电器件、催化和分离应用的新特性。
