Nitroxyl radical based conjugated microporous polymers as heterogeneous catalysts for selective aerobic alcohol oxidation

Abstract

Covalent anchoring of 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) on the scaffold of conjugated microporous polymers (CMPs) was achieved via cost-effective FeCl₃-catalyzed oxidative polymerization of dicarbazole functionalized TEMPO. These TEMPO-CMPs exhibit excellent catalytic performance for the aerobic oxidation of a wide variety of alcohols under metal-free conditions. In addition, the TEMPO-CMPs could be recycled at least 20 times with good retention of high catalytic activities.