A Macrocycle‐Based Supramolecular Strategy for Interchangeable Screwdriver‐Like On‐Demand Post‐Functionalization of Covalent Organic Framework

IF 16.1 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
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.
基于大环的可互换螺丝刀式共价有机骨架随需随用后功能化的超分子策略
通过后功能化构建功能化共价有机框架(COFs)是最重要的应用途径之一,但经常受到反应类型有限、不同前体合成繁琐以及COFs合成参数筛选耗时等问题的困扰。此外,一旦它们的功能与COF骨架共价连接,它们的功能就很难改变。在此,我们报告了一种基于大环的超分子策略,用于在相同的COF平台上进行可变非共价后功能化,就像一个可互换的螺丝刀。作为概念验证,具有富电子空腔的柱状[5]芳烃(P5A)作为大环宿主被纳入COF中,以锚定不同功能的不同缺电子来宾。这样的设计可以通过主客体相互作用实现可调的COF后功能化,用于定制实用程序,这已经通过使用一系列客体来证明,包括用于碘捕获的有机盐和用于金属离子分离的氰基配体。移除客户端可以回收COF,连续重新安装不同的客户端,并持续用于实现预期的任务。这项工作建立了一种通用的非共价方法来实现COFs的按需可互换的后功能化。
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来源期刊
CiteScore
26.60
自引率
6.60%
发文量
3549
审稿时长
1.5 months
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.
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