| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 40476 | Applied Catalysis A: General | 2013 | 8 Pages |
Gold nanoparticles immobilized on lipoic acid functionalized SBA-15 (SBA-LAG) catalyst was synthesized via functionalization of SBA-15 with propylamine followed by tethering of lipoic acid and immobilization of gold nanoparticles. The structural and texctural characteristics of the catalyst have been determined by N2 adsorption–desorption and low-angle XRD. The successive attachment of spacers has been characterized by 13C CP-MAS NMR, FT-IR and TG-DTA. The size, shape, surface composition and oxidation state of gold nanoparticles have been determined by XRD, TEM and XPS techniques. SBA-LAG catalyst is found to be an efficient solid catalyst for producing good to excellent yields of propargylamines by condensing three-components such as (i) amine, (ii) aldehyde and (iii) alkyne in one-pot under solvent-free conditions.
Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (108 K)Download as PowerPoint slideHighlights► SBA-LAG is a new hexagonally ordered mesoporous heterogeneous catalyst. ► Lipoic acid spacer acts as anchoring point to SBA-15 and capping agent for AuNPs. ► SBA-LAG is a solvent-free and leaching-free catalyst. ► SBA-LAG is a highly efficient catalyst for propargylamines synthesis. ► SBA-LAG is a stable catalyst and minimizes diffusion limitations.
