title: Silver nanoparticles supported over mesoporous alumina as an efficient nanocatalyst for N-alkylation of hetero (aromatic) amines and aromatic amines using alcohols as alkylating agent.
abstract: We have successfully embedded rhombohedral crystallites of silver nanoparticles (Ag-NPs) over mesoporous alumina (Ag@Al2O3) material for the first time. The Ag@Al2O3has been characterized by powder X-ray diffraction (PXRD), ultra high resolution transmission electron microscopy (UHR-TEM), scanning electron microscopy (SEM), N2adsorption/desorption isotherm, Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible absorption spectra (UV-Vis), and thermogravimetric analysis (TGA). The PXRD confirms the presence of the rhombohedral phase of Ag nanoparticles. The agglomeration of the silver nanoparticle having a dimension of 80-90nmhas been clearly observed from UHR-TEM images. This novel nanocatalyst showed excellent catalytic activity towards the N-alkylation of hetero (aromatic) amines and aromatic amines using alcohols as the alkylating agent. The catalyst is heterogeneous in nature and can be recovered and recycled more than five reaction cycles without any noticeable loss in its catalytic activity.
authors.affiliation: Department of Chemistry, Aliah University, Newtown, Kolkata 700156, West Bengal, India.
authors.forename: Priyanka
authors.initials: P
authors.lastname: Paul
authors.affiliation: Department of Material Science, Indian Association for the Cultivation of Science, Kolkata 700032, India.
authors.forename: Piyali
authors.initials: P
authors.lastname: Bhanja
authors.affiliation: Department of Chemistry, The University of Burdwan, Burdwan 713104, W.B., India.
authors.forename: Noor
authors.initials: N
authors.lastname: Salam
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 Material 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, Aliah University, Newtown, Kolkata 700156, West Bengal, India. Electronic address: mafizchem@gmail.com.
authors.forename: Seikh Mafiz
authors.initials: SM
authors.lastname: Alam
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: Alumina; Hetero (aromatic) amines; Mesoporous material; N-alkylation reaction; Silver nanoparticles