Search

Cooperation of transition metal catalysis with photocatalysis is an emerging powerful approach to achieve coupling reactions for the synthesis of important chemicals. Owing to their facilely modulated structures and properties via reticular chemistry, photoactive covalent organic frameworks (COFs) arise quickly in building metallaphotocatalytic platforms targeting more efficient and sustainable protocol. In this Minireview, we summarize the recent advances in COFs‐based (integrated) platforms to forge carbon‐carbon/heteroatom (C, B, N, O, P, and S, etc.) bonds via a variety of cross‐coupling reactions driven by light, with focuses on the engineering of COFs' backbone, as well as the organization mode of COFs and metal site promoted catalytic performance. We also highlight the essential role of the underlying electron/energy processes in metallated COFs platforms (M@COFs). Aiming to guide catalysts' design to achieve more efficient performance or currently challenging transformations, we give our perspectives in this under‐developed yet promising field. [ABSTRACT FROM AUTHOR]

The environmental distribution and bioaccumulation of anthropogenic halogenated aromatic pollutants cause severe health problems. Hydrodehalogenation is an effective route to remove these types of compounds, generating hydrogenated products and halide anions. Photocatalytic systems can provide highly reactive species to break carbon‐halogen bonds, leading to hydrodehalogenation under mild conditions with simple alcohols or amines instead of hazardous stoichiometric reagents. Here, we review significant advances in light‐driven hydrodehalogenation based on different types of photocatalysts for the transformation of halogenated aromatics. We detail the reaction pathways and product distributions. Challenges, key principles and strategies to improve dehalogenation efficiency are also discussed. A light in shining armor: Light‐driven hydrodehalogenation for transformation of halogenated aromatic contaminants. Photocatalytic system based on molecular photosensitizers, semiconductors, and plasmonic metal nanoparticles. Electron transfer‐ or hydrogen/hydride transfer‐induced activation of carbon‐halogen bonds. [ABSTRACT FROM AUTHOR]