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چکیده
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In this work, surface of magnetic MCM-41 nanoparticles were modified by 3- aminopropyltriemtoxysilane and further 1-methyl imidazole anchored on its surface using cyanuric chloride as linker. Then, palladium nanoparticles were immobilized on the its surface (Pd-imi-CC@MCM‐41/Fe3O4) and further was studied as magnetically recyclable nanocatalyst in carbon-carbon coupling reactions between wide range of aryl halides with butyl acrylate, methyl acrylate, acrylonitrile, phenylboronic acid, and 3,4- diflorophenylboronic acid under phosphine-free ligand and air atmosphere. This catalyst has advantages of both Fe3O4 nanoparticles and mesoporous MCM-41. Catalyst structure was characterized using SEM, EDS, WDX, N2 adsorption–desorption isotherms, XRD, TGA, FT-IR, and AAS techniques. All products from carbon-carbon coupling reaction were obtained with excellent yields and high TON and TOF values, which were indicate the high efficiency and catalytic activity of this catalyst. This catalyst was shows a good selectivity in C-C coupling reactions. Heterogeneity and stability of Pd-imi-CC@MCM‐ 41/Fe3O4 was studied by AAS technique, leaching test and poisoning test.
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