title: Ag@polypyrrole: A highly efficient nanocatalyst for the N-alkylation of amines using alcohols.
abstract: We have synthesized Ag@polypyrrole nanomaterial by dispersing ultrafine silver nanoparticles (Ag NPs) over the organic polymer polypyrrole. The Ag@polypyrrole material has been characterized by powder X-ray diffraction (PXRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), electron paramagnetic resonance (EPR), Fourier transform infrared (FT-IR), ultraviolet-visible absorption (UV-vis) and atomic adsorption spectroscopy (AAS), and thermogravimetric analysis (TGA). The XRD pattern suggested the cubic crystalline phase of Ag NPs in Ag@polypyrrole. TEM image analysis revealed that silver nanoparticles are highly dispersed in the polymer matrix. The Ag@polypyrrole acts as an efficient and versatile heterogeneous nanocatalyst in the N-alkylation of amines using alcohols. The catalyst can be easily prepared, highly robust and reused several times without decrease in its catalytic activity.
authors.affiliation: Department of Chemistry, University of Kalyani, Kalyani, Nadia 741235, W.B., India.
authors.forename: Usha
authors.initials: U
authors.lastname: Mandi
authors.affiliation: Department of Materials Science, Indian Association for the Cultivation of Science, Kolkata 700032, India.
authors.forename: Sudipta K
authors.initials: SK
authors.lastname: Kundu
authors.affiliation: Department of Chemistry, University of Kalyani, Kalyani, Nadia 741235, W.B., India.
authors.forename: Noor
authors.initials: N
authors.lastname: Salam
authors.affiliation: Department of Materials Science, Indian Association for the Cultivation of Science, Kolkata 700032, India. Electronic address: msab@iacs.res.in.
authors.forename: Asim
authors.initials: A
authors.lastname: Bhaumik
authors.affiliation: Department of Chemistry, University of Kalyani, Kalyani, Nadia 741235, W.B., India. Electronic address: manir65@rediffmail.com.
authors.forename: Sk Manirul
authors.initials: SM
authors.lastname: Islam
keywords: Aromatic amines; N-alkylation reactions; Polypyrrole; Silver nanoparticles