Visible light-driven C–H arylation of heteroarenes with aryl diazonium salts in water catalyzed by a Z-scheme CuInS2/K-C3N4 heterojunction

Abstract

A CuInS₂ quantum dot-modified K-C₃N₄ Z-scheme heterojunction was designed and synthesized. The structure and composition of CuInS₂/K-C₃N₄ were well characterized. The arylation of heteroarenes with aryl diazonium salts driven by a heterogeneous CuInS₂/K-C₃N₄ catalytic system was established under visible light irradiation in water for the first time. A variety of arylated heteroarenes were synthesized in high yields with commendable functional group tolerance. The designed CuInS₂/K-C₃N₄ photocatalyst can be recycled and reused several times without significantly reducing its catalytic activity.