Efficient one-pot synthesis of propargylamines catalysed by gold nanocrystals stabilized on montmorillonite

NCUIR > College of Electrical Engineering & Computer Science > Department of Electrical Engineering > journal & Dissertation > Item 987654321/107147

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/107147

Title:	Efficient one-pot synthesis of propargylamines catalysed by gold nanocrystals stabilized on montmorillonite
Authors:	戴帕克;Borah, Bibek Jyoti;Borah, Subrat Jyoti;Saikia, Kokil;Dutta, Dipak Kumar
Contributors:	資訊電機學院電機工程學系
Date:	2014-11-01
Issue Date:	2026-04-23 13:58:00 (UTC+8)
Publisher:	Royal Society of Chemistry
Abstract:	摘要： Size selective Au 0 -nanoparticles were generated in situ in the nanopores of modified montmorillonite. The modification of montmorillonite was carried out with HCl under controlled conditions for generating nanopores (less than 8 nm) in the matrix and these nanopores acted as "hosts" for the in situ generation of Au 0 -nanoparticles. The synthesis consisted of impregnation of the acid-activated montmorillonite with HAuCl 4 aqueous solution followed by reduction with NaBH 4 . The synthesised Au 0 -nanoparticles crystallized in the face centred cubic lattice were single crystals with a preferential growth direction along the (111) plane. A N 2 adsorption-desorption study revealed specific surface areas of 327-579 m 2 g −1 , large specific pore volumes ~0.7 cm 3 g −1 , and pore diameters of 0-10 nm of the support. TEM, FESEM and X-ray studies indicate that Au 0 -nanoparticles of 0-10 nm were evenly distributed on the support which then serves as an efficient green catalyst for the one-pot, three-component coupling of an aldehyde, an amine and an alkyne via C-H alkyne-activation to synthesize propargylamines with 82-94% yield and 100% selectivity under mild reaction conditions. The nanocatalysts can be recycled and reused several times without significant loss of their catalytic activity. Size selective Au 0 -nanoparticles were generated in situ in the nanopores of montmorillonite and applied in the one-pot, three-component coupling of an aldehyde, an amine and an alkyne to synthesize propargylamines. 出版日期： 2014-10-06 資源來源： Royal Society of Chemistry 識別號： ISSN: 2044-4753 識別號： EISSN: 2044-4761 識別號： DOI: 10.1039/c4cy00666f
Appears in Collections:	[Department of Electrical Engineering] journal & Dissertation

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	13	View/Open

社群 sharing

Loading...