Su Yan, Wan Yuejuan, Xu Hong, Otake Ken-Ichi, Tang Xiaohui, Huang Liangbin, Kitagawa Susumu, Gu Cheng
State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou 510640, P. R. China.
Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, P. R. China.
J Am Chem Soc. 2020 Aug 5;142(31):13316-13321. doi: 10.1021/jacs.0c05970. Epub 2020 Jul 22.
We report the synthesis of crystalline two-dimensional covalent organic frameworks (COFs) by connecting hydroxybenzene-aldehyde and acetonitrile building blocks to form cyano-substituted benzofuran linkages. Unlike the majority of COFs that were synthesized based on condensation reactions, the COFs in this report are crystallized from irreversible cascade reactions involving consecutive cyanide migration, ring-closure, and oxidation reactions. The irreversible property endows the COFs with high chemical stability in both acid and base and allows them to be postsynthetically modified to install predesigned functionality under harsh conditions. We highlight that the functionalized COFs serve as exceptional vehicles for superprotonic conductions.
我们报道了通过连接羟基苯甲醛和乙腈结构单元以形成氰基取代的苯并呋喃连接体来合成结晶二维共价有机框架（COF）。与大多数基于缩合反应合成的COF不同，本报告中的COF是通过涉及连续氰化物迁移、闭环和氧化反应的不可逆级联反应结晶而成。这种不可逆特性赋予了COF在酸和碱中都具有高化学稳定性，并使其能够在苛刻条件下进行后合成修饰以安装预先设计的功能。我们强调，功能化的COF是超质子传导的优异载体。
