Enhanced Energy Transfer in A π‐Conjugated Covalent Organic Framework Facilitates Excited‐State Nickel Catalysis

Covalent organic frameworks (COFs) have received broad interest owing to their permanent porosity, high stability, and tunable functionalities. COFs with long-range π-conjugation photosensitizing building blocks been explored for sustainable photocatalysis. Herein, we report the first example of COF-based energy transfer Ni catalysis. A pyrene-based COF sp2 carbon-conjugation was synthesized used coordinate NiII centers through bipyridine moieties. Under light irradiation, enhanced in facilitated excitation catalyze borylation trifluoromethylation reactions aryl halides. The showed two orders magnitude higher efficiency these than its homogeneous control could be recovered reused without significant loss catalytic activity.