Magnetically palladium catalyst stabilized by diaminoglyoxime-functionalized magnetic Fe3O4 nanoparticles as active and reusable catalyst for Suzuki coupling reactions

•A Pd supported on diaminoglyoxime (DAG)-functionalized Fe3O4 was reported.•Fe3O4/DAG/Pd show superior activity in the Suzuki reactions.•The products were produced in excellent yields under mild conditions.•Low palladium loading was used in the reaction.•The catalyst can be reused at least eight consecutive cycles.

A Pd supported on diaminoglyoxime (DAG)-functionalized Fe3O4 (Fe3O4/DAG/Pd) hybrid materials was fabricated for the first time. In this fabrication, DAG played an important role as a capping agent. The immobilized palladium catalyst was an efficient catalyst without added phosphine ligands for the Suzuki cross-coupling reaction of several aryl halides with phenylboronic acid in aqueous phase at room temperature. The yields of the products were in the range from 70% to 98%. The prepared heterogeneous nanocatalyst was characterized by XRD, XPS, EDS, FT-IR, ICP, FESEM, VSM and TEM. Interestingly, the novel catalyst could be recovered in a facile manner from the reaction mixture by applying an external magnet device and recycled eight times without any significant loss in activity.

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