Heterogenization of Cobalt on Nanostructured Magnetic Covalent Triazine Framework: Effective Catalyst for Buchwald-Hartwig N-Arylation, Reduction, and Oxidation Reactions

The present study describes a methodology to heterogenize metallic Co nanoparticles (NPs) on hollow Fe 3 O 4 nanospheres, surface-functionalized with a porous covalent triazine framework, leading to a magnetically separable catalyst that exhibits efficient catalytic activity in hydrogenation, ligand-free Buchwald-Hartwig N-arylation, and oxidation reactions. Here, the presence of a nitrogen-enriched porous structure is expected to provide potential interactions with active centers through coordination (M←N), enable the isolation of the entrapped catalytically active Co NPs, and prevent the possibility of sintering during catalytic reactions, resulting in structurally stable catalytic sites, which makes them recyclable without any loss in activity.