Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/207314
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Platinum nanoparticles stabilized by N-heterocyclic thiones. Synthesis and catalytic activity in mono- and di-hydroboration of alkynes |
Autor: | Moraes, Leonardo C.; Figueiredo, Rute C.; Espinós, J.P. CSIC ORCID; Vattier, Florencia CSIC ORCID; Franconetti, Antonio; Jaime, Carlos; Lacroix, Bertrand CSIC ORCID; Rojo, Francisco Javier ; Lara, Patricia CSIC ORCID; Conejero, Salvador CSIC ORCID | Fecha de publicación: | 2020 | Editor: | Royal Society of Chemistry (UK) | Citación: | Nanoscale, 12:6821 (2020) | Resumen: | N-Heterocyclic Thiones (NHT) proved to be efficient ligands for the stabilization of small platinum nanoparticles (1.3–1.7 nm), synthesized by decomposition of [Pt(dba)2], under a H2 atmosphere, in the presence of variable sub-stoichiometric amounts of the NHT. Full characterization by means of TEM, HR-TEM, NMR, ICP, TGA and XPS have been carried out, providing information about the nature of the metal nanoparticles and the interaction of the NHT ligands to the metal surface. Importantly, DFT calculations indicate that some NHT ligands interact with the metal through the CvC double bond of the imidazole fragment in addition to the sulfur atom, thus providing additional stabilization to the nanoparticles. According to XPS, TGA and ICP techniques, the surface coverage by the ligand increases by decreasing the size of the substituents on the nitrogen atom. The platinum nanoparticles have been used as catalyst in the hydroboration of alkynes. The most active system is that with a less covered surface area lacking an interaction of the ligand by means of the CvC double bond. This catalyst hydroborates alkynes with excellent selectivities towards the monoborylated anti-Markovnikov product (vinyl-boronate) when one equiv. of borane is used. Very interestingly, aliphatic alkynes undergo a second hydroborylation process leading to the corresponding 1,1- and 1,2-diboroylated species with good selectivities towards the former | Versión del editor: | https://doi.org/10.1039/d0nr00251h | URI: | http://hdl.handle.net/10261/207314 | DOI: | 10.1039/d0nr00251h |
Aparece en las colecciones: | (IIQ) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
d0nr00251h.pdf | 3,77 MB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
17
checked on 12-may-2024
WEB OF SCIENCETM
Citations
16
checked on 21-feb-2024
Page view(s)
143
checked on 16-may-2024
Download(s)
131
checked on 16-may-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.