Show simple item record

Files in this item


Item metadata

dc.contributor.authorChoudhury, Prasun
dc.contributor.authorChattopadhyay, Shreyasi
dc.contributor.authorDe, Goutam
dc.contributor.authorBasu, Basudeb
dc.identifier.citationChoudhury , P , Chattopadhyay , S , De , G & Basu , B 2021 , ' Ni-rGO-zeolite nanocomposite : an efficient heterogeneous catalyst for one-pot synthesis of triazoles in water ' , Materials Advances , vol. Advance Article .
dc.identifier.otherPURE: 274092337
dc.identifier.otherPURE UUID: d76ba0bb-ee15-476f-9530-f9c4e3bac28b
dc.identifier.otherRIS: urn:103F659FD887EA12D746C40879861E85
dc.identifier.otherWOS: 000639036800001
dc.identifier.otherScopus: 85105883518
dc.descriptionFinancial support from SERB, New Delhi is gratefully acknowledged (Grant No EMR/2015/000549). PC and SC thanks UGC, New Delhi, for Senior Research Fellowship under UGC-NET.en
dc.description.abstractAn important group of pharmaceutical materials, 1,2,3-triazoles, has been synthesised using a Ni-based nanocomposite catalyst (Ni-rGO-zeolite) through azide alkyne cycloaddition (NiAAC). First, a GO-zeolite hybrid was prepared through protonation of a Na-Y-zeolite by H+ ions originating from the -COOH groups of GO. Subsequently the GO-zeolite was treated with Ni-acetate solvothermally in the presence of NaBH4 (reducing atmosphere). Under the solvothermal conditions a significant part of the incorporated Ni ions in the GO-zeolite were reduced to Ni(0) and simultaneously GO was transformed into rGO. The resulting ternary nanocomposite, Ni-rGO-zeolite, serves as a highly efficient heterogeneous catalyst, and shows excellent regioselectivity forming 1,4-disubstituted-1,2,3-triazoles as the sole product at a low loading of the nickel (similar to 2.6 mol% with respect to the substrate) with recyclability, and without any significant leaching of the metal. In addition, the Ni-rGO-zeolite exhibits enhanced efficiency under aqueous conditions, proficiency with varying substrates and overcomes some of the shortcomings of the previously reported limited number of Ni-based and other catalysts. The catalytic process is believed to involve the active Ni(0) species, which is stabilized by electron rich rGO that is supported on the microporous high-surface-area zeolite.
dc.relation.ispartofMaterials Advancesen
dc.rightsCopyright © 2021 The Author(s). Published by the Royal Society of Chemistry. article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.en
dc.subjectQD Chemistryen
dc.titleNi-rGO-zeolite nanocomposite : an efficient heterogeneous catalyst for one-pot synthesis of triazoles in wateren
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Chemistryen
dc.description.statusPeer revieweden

This item appears in the following Collection(s)

Show simple item record