Abstract
Porphyrin based covalent organic polymers are excellent catalysts. Herein, a sp2 carbon linked porphyrin based organic polymer H2Pp-PDAN was designed and synthesized by co-condensation of porphyrin monomer containing flexible chains H2Pp with 1, 4-phenylenediacetonitrile PDAN. As photocatalysts, H2Pp-PDAN exhibited excellent photocatalytic performance for photocatalytic oxidative coupling of amines, and was successfully used for 15 consecutive reactions with no detectable reduction of the catalytic activity. H2Pp-PDAN showed good photocatalytic activity and excellent recyclability for photocatalytic oxidation of thioanisole to methyl phenyl sulfoxide. Mechanistic studies revealed that the photocatalytic oxidation of benzylamine coupling by H2Pp-PDAN proceeds via both energy transfer and electron transfer pathways.
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