Immobilization of ZIF-67 on C3N4 loaded with Fe3O4 as a novel efficient nanocatalyst for Biginelli reaction

A novel ternary magnetically composite, C3N4/Fe3O4 supported ZIF-67 (C3N4/Fe3O4/ZIF-67) was fabricated by a simple approach and its characterization was followed by various analyses. Firstly, C3N4 was synthesized and used as a support for loading Fe3O4. C3N4/Fe3O4 as a reactive support was modified with ZIF-67. The constructed hybrid nanomaterial was applied as a nanocatalyst in the formation of dihydropyrimidinone derivatives with high yields between 86 and 96% in the absence of solvent at 80 °C (10 mg catalyst loading within 20–45 min). Owing to the synergistic effect of acidic sites (ZIF-67) and basic sites (C3N4), C3N4/Fe3O4/ZIF-67 displayed exceptional catalytic activity. Moreover, C3N4/Fe3O4/ZIF-67 has exhibited recyclability for five runs.