Selective ultrasonic assisted synthesis of iron oxide mesoporous structures based on sulfonated melamine formaldehyde and survey of nanorod/sphere, sphere and core/shell on their catalysts properties for the Biginelli reaction

Magnetized melamine‐modified polyacrylonitrile (PAN@melamine/Fe3O4) organometallic nanomaterial: Preparation, characterization, and application as a multifunctional catalyst in the synthesis of bioactive dihydropyrano [2,3‐c]pyrazole and 2‐amino‐3‐cyano 4H‐pyran derivatives

“…the diffractogram of this nanocomposite showed several diffraction peaks, the peaks at 2ϴ = 13. 39 16.99 which was corresponded to the (1 0 0) crystal plane structure of the PAN.…”

“…[12,13] Due to the existence of several amino groups in the tris-triazine units, proper bandgap, chemical stability, nontoxicity, and hydrothermal stability, it can be considered as an applicable candidate to modify lots of material to generate efficient catalytic systems. [14][15][16] Incorporation of the magnetic nanomaterial into the organic, inorganic, or hybrid materials is a practical way to obtain retrievable and reusable nanocomposite catalyst with improved surface area. [17][18][19][20] Multicomponent reactions (MCRs) are significant methods to synthesize diverse complex heterocyclic compounds.…”