New routes to Cu(l)/Cu nanocatalysts for the multicomponent click synthesis of 1,2,3-triazoles
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Título: | New routes to Cu(l)/Cu nanocatalysts for the multicomponent click synthesis of 1,2,3-triazoles |
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Autor/es: | Abdulkin, Pavel | Moglie, Yanina | Knappett, Benjamin R. | Jefferson, David A. | Yus, Miguel | Alonso, Francisco | Wheatley, Andrew E.H. |
Grupo/s de investigación o GITE: | Nuevas Metodologías en Síntesis Orgánica |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Departamento de Química Orgánica |
Palabras clave: | Nanocatalysts | Synthesis |
Área/s de conocimiento: | Química Orgánica |
Fecha de publicación: | 5-nov-2012 |
Editor: | Royal Society of Chemistry |
Cita bibliográfica: | ABDULKIN, Pavel, et al. “New routes to Cu(l)/Cu nanocatalysts for the multicomponent click synthesis of 1,2,3-triazoles”. Nanoscale. Vol. 5, Issue 1 (2012). ISSN 2040-3364, pp. 342-350 |
Resumen: | An array of copper and copper–zinc based nanoparticles (NPs) have been fabricated employing a variety of polymeric capping agents. Analysis by TEM, XRPD and XPS suggests that by manipulating reagent, reductant and solvent conditions it is possible to achieve materials that are mono-/narrow disperse with mean particle sizes in the ≤10 nm regime. Oxidative stability in air is achieved for monometallic NPs using poly(methyl methacrylate) (PMMA) anti-agglomerant in conjunction with a variety of reducing conditions. In contrast, those encapsulated by either poly(1-vinylpyrrolidin-2-one) (PVP) or poly(4-vinylpyridine) (PVPy) rapidly show Cu2O formation, with all data suggesting progressive oxidation from Cu to Cu@Cu2O core–shell structure and finally Cu2O. Bimetallic copper–zinc systems, reveal metal segregation and the formation of Cu2O and ZnO. Catalysts have been screened in the synthesis of 1,2,3-triazoles through multicomponent azide–alkyne 1,3-dipolar cycloaddition. Whereas PMMA- and PVPy-coating results in reduced catalytic activity, those protected by PVP are highly active, with quantitative triazole syntheses achieved at room temperature and with catalyst loadings of 0.03 mol% metal for Cu and CuZn systems prepared using NaH2PO2, N2H4 or NaBH4 reductants. |
Patrocinador/es: | This work was generously supported by the Spanish Ministerio de Ciencia e Innovación (MICINN; CTQ2007-65218 and Consolider Ingenio 2010-CSD2007-00006), the Generalitat Valenciana (GV; PROMETEO/2009/039), and FEDER. Y. M. and B. R. K. thank the ISO of the Universidad de Alicante, the UK EPSRC and the University of Cambridge for grants. |
URI: | http://hdl.handle.net/10045/25657 |
ISSN: | 2040-3364 (Print) | 2040-3372 (Online) |
DOI: | 10.1039/C2NR32570E |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1039/C2NR32570E |
Aparece en las colecciones: | INV - MESO - Artículos de Revistas INV - SINTAS - Artículos de Revistas INV - MATCAT - Artículos de Revistas |
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New_routes_to_final.pdf | Versión final (acceso restringido) | 599,06 kB | Adobe PDF | Abrir Solicitar una copia |
New_routes_to.pdf | Versión revisada (acceso abierto) | 897,73 kB | Adobe PDF | Abrir Vista previa |
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