Synthesis and characterization of Ag@Carbon core-shell spheres as a novel catalyst for room temperature N-arylation reaction

Seyedeh Mozhgan Seyed-Talebi, Iraj Kazeminezhad, Manijeh Nematpour

Index: 10.1016/j.jcat.2018.02.029

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Abstract

The Ag@Carbon core-shell spheres were synthesized using a green, cheap, and easy process. The products were characterized by XRD, FESEM, TEM, MAP, EDX, Raman, and FT-IR analysis. The synthesis of a novel class of trichloro-1-nitroprop-1-en-2-amine via our Ag@Carbon spheres as a new Ag-catalyzed multicomponent reaction of nitroalkane-trichloroacetonitrile adduct and aryl halides in good yields under mild reaction conditions is reported. The catalytic activity of core-shell spheres was determined by changing the solvent and catalyst. The effect of solvent was investigated by performing the model reaction in the presence of catalyst in various conditions with DMF, DMSO, Toluene, THF, acetone and acetonitrile solvents. Among them, acetonitrile was found to be the best solvent in terms of the reaction time and yield of desired product. A comprehensive catalytic analysis of Ag@Carbon with Ag nanoparticles and carbon spheres as references and commercial AgI, AgBr, AgNO3, and Ag2SO4 as Ag based catalysts has been performed.