Bifunctional metal–organic frameworks toward photocatalytic CO 2 reduction by post‐synthetic ligand exchange

Photocatalytic reduction of CO 2 to useful fuel has been identified as a promising strategy to address the energy and environmental issues. Development of well‐defined photocatalysts toward CO 2 reduction has attracted increasing interest to gain insight into the reactive mechanism. Herein, by post‐synthetic ligand exchange, a bifunctional Re‐based metal–organic framework (MOF) was successfully prepared. It not only serves as a photosensitizer but also acts as a catalyst for photochemical reduction of CO 2 . Furthermore, it is found that a Re‐based MOF containing 30% Re‐based ligands displays improved activity compared to MOF with 100% Re‐based ligands. This work provides clues to the design and synthesis of bifunctional MOFs toward photocatalytic CO 2 reduction.