Efficient Aliphatic C-H Oxidation and C=C Epoxidation Catalyzed by Porous Organic Polymer-Supported Single-Site Manganese Catalysts

Bioinspired manganese complexes have emerged over recent decades as attractive catalysts for a number of selective oxidation reactions. However, these catalysts still suffer from oxidative degradation. In the present study, we prepared a series of porous Mn-N-4 catalysts in which the catalytic units are embedded in the skeleton of porous organic polymers (POPs). These POPbased manganese catalysts demonstrated high reactivity in the oxidation of aliphatic C-H bonds and the asymmetric epoxidation of olefins. Furthermore, these catalysts could be readily recycled and reused due to their heterogeneous nature. Morphological characterization revealed that the Mn-N-4 complex was individually distributed over a porous polymer network. Remarkably, the nature of the single-site catalyst prevented oxidative degradation during the reaction. The present work has thus developed a successful approach for bioinspired single-site manganese catalysts in which the oxidation reaction is confined to a specific channel in an enzyme-like mode.

Automated summary

This study successfully developed bioinspired manganese catalysts using porous organic polymers (POPs) as scaffolds, which showed high reactivity in oxidation reactions and could be easily recycled and reused. The single-site nature of the catalyst prevented oxidative degradation during the reaction, making it a promising approach for selective oxidation reactions.