علي ميري تنها

In this study, a magnetic nanocatalyst with the structure Fe₃O₄@SiO₂@CPTMS@(isatoic anhydride + aminotriazole)@Cu was designed an‎d synthesized. In this architecture, iron ferrite magnetic nanoparticles (Fe₃O₄) served as the core an‎d were coated with a silica shell (SiO₂) to enhance chemical stability an‎d provide an appropriate platform for surface functionalization. The silane coupling agent CPTMS was employed to introduce reactive functional groups onto the surface, followed by the immobilization of organic ligan‎ds, namely isatoic anhydride an‎d aminotriazole, which generated suitable complexation sites for copper ions. Finally, Cu(II) ions were anchored onto the functionalized surface, acting as the catalytically active centers. The synthesized nanocatalyst was thoroughly characterized using FT-IR, XRD, FE-SEM, EDX, VSM, BET, an‎d TGA analyses. The results revealed the formation of uniformly dispersed nanoparticles with an average size in the range of 40–295 nm. The nanocatalyst exhibited a saturation magnetization of approximately 17 emu g⁻¹, enabling its rapid an‎d efficient separation from the reaction medium using an external magnetic field. The specific surface area determined by the BET method was about 52.3 m² g⁻¹, indicating the preservation of a stable mesoporous structure with favorable permeability. The catalytic performance of the prepared nanocatalyst was eva‎luated in the [3+2] cycloaddition reaction between benzyl azide an‎d phenylacetylene for the synthesis of 1,2,3-triazole derivatives. The results demonstrated a high reaction yield of up to 94% under mild conditions, employing an aqueous–ethanolic solvent system. Moreover, the catalyst exhibited excellent recyclability an‎d could be reused for at least four consecutive cycles without a noticeable loss in catalytic activity. These findings indicate that the synthesized magnetic nanocatalyst combines high catalytic efficiency, chemical stability, an‎d magnetic recyclability, making it a green an‎d effective catalytic system for the synthesis of heterocyclic compounds.

نانوكاتاليست , نانو كاتاليست مغناطيسي , تري آزول ها , واكنش كليك

triazole , nanocatalyst , magnetic nanocatalyst , click reaction

ali miritanha

Shahrzad Javanshir