A magnetically recoverable heterogeneous Fe3O4@SiO2@BHA-Cu(II) nanocomposite was prepared by immobilizing a novel Cu(II) complex on the nanoparticles. The catalyst was characterized by FT-IR, TGA, VSM, TEM, FESEM, XRD, ICP, and EDX techniques. The catalytic activity of nanocatalysts in the synthesis of tetrazoles and polyhydroquinoline derivatives was investigated. This new and recyclable magnetic nanocatalyst has outstanding features such as short reaction time, high atom economy, easy work-up, mild reaction conditions, and excellent yields of the products.
