Palladium Catalysis for Aerobic Oxidation Systems Using Robust Metal-Organic Framework.

Described here is a new and viable approach to achieve Pd catalysis for aerobic oxidation systems (AOSs) by circumventing problems associated with both the oxidation and the catalysis through an all-in-one strategy, employing a robust metal-organic framework (MOF). The rational assembly of a Pd catalyst, phenanthroline ligand, and Cu species (electron-transfer mediator) into a MOF facilitates the fast regeneration of the Pd active species, through an enhanced electron transfer from in situ generated Pd to Cu , and then Cu to O , trapped in the framework, thus leading to a 10 times higher turnover number than that of the homogeneous counterpart for Pd-catalyzed desulfitative oxidative coupling reactions. Moreover, the MOF catalyst can be reused five times without losing activity. This work provides the first exploration of using a MOF as a promising platform for the development of Pd catalysis for AOSs with high efficiency, low catalyst loading, and reusability.