A Versatile Method for Functionalization of Covalent Organic Frameworks via Suzuki–Miyaura Cross‐Coupling

Abstract Post‐synthetic modification (PSM) is a prevalent and powerful strategy to introduce desired functionalities into covalent organic frameworks (COFs) for functional products, expediting their applications vastly. Herein, we demonstrate a PSM strategy for functionalizing brominated COFs via the well‐developed Suzuki–Miyaura cross‐coupling. By this, a variety of functionalities were installed into COFs efficiently, while the crystallinity and porosity of COFs was well‐retained. As a proof‐of‐concept, BrCOF‐2 was modified with trifluoromethyl groups to produce a SF 6 adsorbent with remarkably enhanced properties. This facile and versatile approach opens a new door for the synthesis of functional COFs, and greatly expands the scope of their structural design aiming for various properties and applications.