Olefin‐Linked Covalent Organic Frameworks as Prospective Artificial Platforms for Efficient Photocatalysis

The development of semiconducting materials for photoredox catalysis holds great promise for sustainable utilization of solar energy. Olefin‐linked covalent organic frameworks (COFs), which are built by linking organic structs into crystalline frameworks through C=C bonds, have attracted tremendous attention in photocatalysis due to their saliant advantages such as extended π‐conjugation, permanent porosity, exceptional chemical stability, light‐harvesting and charge separation abilities. This review offers a comprehensive overview of recent new advances toward the development of olefin‐linked COFs and their uses artificial platforms for photocatalytic applications, like hydrogen evolution, carbon dioxide reduction and organic transformations. Structural design strategies, preparation methods and structure‐function relationships in various photoredox reactions are summarized, which is accompanied by various approaches to boost their catalytic performance. The challenges and future prospectives are further discussed.