Cu‐Doped UiO‐66‐NH ₂ Photocatalytic Cross‐Coupling of Arylamine C(sp ² )‐H with Phenothiazine N─H Bonds

Abstract Herein, the Cu‐UiO‐66‐NH 2 photocatalyst was successfully constructed by precisely anchoring Cu active centers to Zr 6 O 4 (OH) 4 secondary building units (SBUs) in UiO‐66‐NH 2 . Under mild reaction conditions, efficient C(sp 2 )─H/N─H cross‐coupling of phenothiazine with electron‐rich aniline was achieved without noble metal cocatalysts or organic photosensitizers. Experimental characterization results show that Cu doping can effectively suppress photogenerated carrier recombination. This not only broadens the visible light absorption range of UiO‐66‐NH 2 , but also improves charge separation efficiency, thus significantly enhancing photocatalytic performance. In addition, hot filtration tests, gram‐scale reactions and multiple cycle experiments confirmed that the catalyst has excellent scalability and stability.