Liancheng Hu, Yimin Cai, Xuwen Guo, Li Wang, Yongjie Jiang, Xiaowei Li, Ning Liu, Wen Feng, Lihua Yuan
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引用次数: 0
Abstract
Constructing functionalized covalent organic frameworks (COFs) through post‐functionalization constitutes one of the most important approaches to applications, but is frequently plagued by limited reaction types, tedious synthesis of different precursors, and time‐consuming screening of synthetic parameters for COFs. Moreover, their functions are difficult to change once the functionalities are covalently attached to COF skeletons. Herein, we report a macrocycle‐based supramolecular strategy for variable noncovalent post‐functionalization on the same COF platform like an interchangeable screwdriver. As a proof of concept, pillar[5]arene (P5A) with electron‐rich cavity is incorporated into COF as macrocycle host to anchor different electron‐deficient guests of various functions. Such a design allows tunable post‐functionalization of COF through host‐guest interactions for customized utilities, which has been demonstrated by using a series of guests including organic salts for iodine capture and cyano‐based ligands for metal ion separation. Removing the guests enables recycling of COF, consecutive reinstallation of different guests, and continuous use for implementing expected tasks. This work establishes a general noncovalent approach to on‐demand interchangeable post‐functionalization of COFs.
期刊介绍:
Angewandte Chemie, a journal of the German Chemical Society (GDCh), maintains a leading position among scholarly journals in general chemistry with an impressive Impact Factor of 16.6 (2022 Journal Citation Reports, Clarivate, 2023). Published weekly in a reader-friendly format, it features new articles almost every day. Established in 1887, Angewandte Chemie is a prominent chemistry journal, offering a dynamic blend of Review-type articles, Highlights, Communications, and Research Articles on a weekly basis, making it unique in the field.