Synthesis of novel and room temperature-operable palladium complexes on graphene oxide: An efficient recyclable catalyst for Suzuki-Miyaura coupling reactions

Novel palladium complexes composed of palladium and a conjugated ligand (imine–aldehyde) were immobilized on graphene oxide. The developed catalyst was characterized by XPS, and TEM. The novel catalyst was proven to be highly efficient for the Suzuki-Miyaura coupling reaction of aryl halides (Br, Cl) with arylboronic acids under mild conditions with a low amount of catalyst (0.1 mol%). In particular, excellent yields could be also obtained at room temperature within 1 h for monosubstituted aryl bromide coupling. Furthermore, the novel catalyst could be reused at least ten times without significant loss of its catalytic activities.