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Efficient Synthesis of Amides Over Cu–Fe Decorated Multiwalled Carbon Nanotubes and Mesoporous Carbon Catalysts

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A mixture of Cu (10%) and Fe (1 to 9%) was deposited on multiwalled carbon nanotubes (MWCNTs) and mesoporous carbon (MC). The catalytic activity was investigated in a reaction between carboxylic acids/esters and aromatic amines. The physico-chemical properties of the materials were characterized by different analytical techniques such as powder XRD (X-ray diffraction), BET (brunauer emmett teller) surface area, XPS (X-ray photoelectron spectroscopy), TPD-NH3 (thermal desorption spectroscopy), SEM-EDS (scanning electron microscopy—energy dispersive spectroscopy) and TEM (transmission electron microscopy). The catalytic activity was investigated in the synthesis of aliphatic and aromatic amides from aliphatic/aromatic carboxylic acids and esters with aniline/benzyl amine. The yields of the product/s were in the range 30 to 92% with 100% selectivity. The percentage yield of amides from esters was found to be less than that of corresponding acids. Cu along with 5% of Fe supported on MWCNTs was found to be a better catalyst than when supported on MC, with respect to the isolated yield of the product/s and recyclability. The catalytic activity of the materials had a good correlation with their surface acidity. A plausible reaction mechanism has been proposed.
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Keywords: Catalytic Activities; Cu–Fe Catalysts; Ester-Amide Exchange Reaction; Recyclability

Document Type: Research Article

Affiliations: 1: Centre for Incubation Innovation Research and Consultancy (CIIRC), Jyothy Institute of Technology Campus, Tataguni Off Kanakapura Road, Bengaluru 560082, Karnataka, India 2: Department of Chemistry, St. Joseph’s College P.G. Centre, 46, Langford Road, Shanthinagar, Bengaluru 560027, Karnataka, India

Publication date: February 1, 2020

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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