Metal‐Organic Cages: Synthetic Strategies and Photocatalytic Application

Abstract Metal‐organic cages (MOCs) are a class of compounds formed through the coordination of metal ions with organic ligands to create well‐defined and cage‐like structure. These unique structures offer versatile environments for catalyzing a wide range of chemical reactions. The catalytic capabilities of MOCs are significantly influenced by the nature of the metal ions, functional ligands, and the cage structure. Notably, the confined spaces within MOCs can lead to enhanced reaction efficiencies, particularly in processes such as light‐induced hydrogen generation and the photocatalytic reduction of CO₂. Furthermore, MOCs show great potential in photo‐organic synthesis due to the cage structure, which provides a confined environment and allows for encapsulating organic molecules, making them useful for improving the selectivity and efficiency of catalytic process. This review reports the development of MOCs for photocatalysis, focusing on the structural design and regulation strategy to build functional MOCs for photocatalytic hydrogen production, CO 2 reduction, organic transformation. Insights into the photocatalysis are discussed including the challenges and further research direction in MOC‐based photocatalysis.