Construction of Covalent‐Organic Frameworks (COFs) from Amorphous Covalent Organic Polymers via Linkage Replacement

作者：Yufeng Zhai, Guiyan Liu, Fenchun Jin, Yingying Zhang, Xuefang Gong, Zhuang Miao, Jin‐Heng Li, Mengyao Zhang, Yumeng Cui, Lingyan Zhang, Yu Liu, Huixin Zhang, Yanli Zhao, Yong‐Fei Zeng · 发表于：Angewandte Chemie International Edition · 年份：2019 · DOI：10.1002/anie.201911231 · 被引用次数：144 · 研究领域：Covalent Organic Framework Applications、Metal-Organic Frameworks: Synthesis and Applications、Advanced Photocatalysis Techniques

Covalent-organic frameworks (COFs) as porous crystalline materials show promising potential applications. However, developing facile strategies for the construction of COFs directly from amorphous covalent organic polymers (COPs) is still a great challenge. To this end, we report a novel approach for easy preparation of COFs from amorphous COPs through the linkage replacement under different types of reactions. Four COFs with high crystallinity and porosity were constructed via the linkage substitution of polyimide-linked COPs to imine-linked COFs as well as imine-linked COPs to polyimide-linked COFs. The realization of the linkage substitution would significantly expand the research scope of COFs.