A novel water‐dispersible and magnetically recyclable nickel nanoparticles for the one‐pot reduction‐Schiff base condensation of nitroarenes in pure water

Abstract

AbstractIn this work, a heterogeneous nanocatalyst called Ni‐Fe3O4@Pectin~PPA ~ Piconal was first synthesized, which was investigated as a bifunctional catalyst containing nickel functional groups. On the other hand, this Ni‐Fe3O4@Pectin~PPA ~ Piconal catalyst in aqueous solvents shows a very effective performance at ambient temperature for the nitroarene reduction reaction with sodium borohydride, for which NaBH4 is considered as a reducing agent. This is a novelty magnetic catalyst that was approved by various methods, including Fourier‐transform infrared spectroscopy (FT‐IR), X‐ray powder diffraction (XRD), Dynamic light scattering (DLS), Transmission electron microscopy (TEM), vibrating sample magnetometer (VSM), Inductively coupled plasma (ICP), Energy‐dispersive X‐ray spectroscopy (EDX), and Field emission scanning electron microscopy (FESEM) analyses. From the satisfactory results obtained from the reduction of nitrogen, this catalytic system is used for a one‐pot protocol containing a reduction‐Schiff base concentration of diverse nitroarenes. It was corroborated with the heterogeneous catalytic experiments on the one‐pot tandem synthesis of imines from nitroarenes and aldehydes. Finally, the novel Ni‐Fe3O4@Pectin~PPA ~ Piconal catalyst could function as a more economically desirable and environmentally amicable in the catalysis field. The favorable products are acquired in good to high performance in the attendance of Ni‐Fe3O4@Pectin~PPA ~ Piconal as a bifunctional catalyst. This catalyst can be recycled up to six steps without losing a sharp drop.