Dual Metalation in a Two-Dimensional Covalent Organic Framework for Photocatalytic C–N Cross-Coupling Reactions

Covalent organic frameworks (COFs) are promising hosts in heterogeneous catalysis. Herein, we report a dual metalation strategy in a single two-dimensional-COF TpBpy for performing a variety of C–N cross-coupling reactions. [Ir(ppy)2(CH3CN)2]PF6 [ppy = 2-phenylpyridine], containing two labile CH3CN groups, and NiCl2 are used as iridium and nickel-metal precursors, respectively, for postsynthetic decoration of the TpBpy COF. Moving from the traditional approach, we focus on the COF-backbone host for visible-light-mediated nickel-catalyzed C–N coupling reactions. The controlled metalation and recyclability without deactivation of both catalytic centers are unique with respect to previously reported coupling…

• DO
  Department of Science and Technology, Ministry of Science and Technology, India

  Awards: DST/TMD(EWO)/IC5-2018/01(C), DST/TM/EWO/MI/CCUS/17, DST/SJF/CSA-02/2016-2017
• CO
  Council of Scientific and Industrial Research, India
• SA
  Science and Engineering Research Board

  Awards: CRG/2019/001232, CRG/2018/000314