English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/216700
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:

Title

Novel nickel nanoparticles stabilized by imidazolium-amidinate ligands for selective hydrogenation of alkynes

AuthorsLópez-Vinasco, Ángela M.; Martínez-Prieto, Luis Miguel ; Asensio, Juan M.; Lecante, Pierre; Chaudret, Bruno; Cámpora, Juan ; Leeuwen, P.W.N.M. van
Issue Date4-Dec-2019
PublisherRoyal Society of Chemistry (UK)
CitationCatalysis Science and Technology 10(2): 342- 350 (2020)
AbstractThe main challenge in the hydrogenation of alkynes into (E)- or (Z)-alkenes is to control the selective formation of the alkene, avoiding the over-reduction to the corresponding alkane. In addition, the preparation of recoverable and reusable catalysts is of high interest. In this work, we report novel nickel nanoparticles (Ni NPs) stabilized by three different imidazolium-amidinate ligands (ICy·(Ar)NCN; L1: Ar = p-tol, L2: Ar = p-anisyl and L3: Ar = p-ClC6H4). The as-prepared Ni NPs were fully characterized by (HR)-TEM, XRD, WASX, XPS and VSM. The nanocatalysts are active in the hydrogenation of various substrates. They present a remarkable selectivity in the hydrogenation of alkynes towards (Z)-alkenes, particularly in the hydrogenation of 3-hexyne into (Z)-3-hexene under mild reaction conditions (room temperature, 3% mol Ni and 1 bar H2). The catalytic behaviour of Ni NPs was influenced by the electron donor/acceptor groups (¿Me, ¿OMe, ¿Cl) in the N-aryl substituents of the amidinate moiety of the ligands. Due to the magnetic character of the Ni NPs, recycling experiments were successfully performed after decantation in the presence of an external magnet, which allowed us to recover and reuse these catalysts at least 3 times preserving both activity and chemoselectivity.
Publisher version (URL)http://dx.doi.org/10.1039/c9cy02172h
URIhttp://hdl.handle.net/10261/216700
DOIhttp://dx.doi.org/10.1039/c9cy02172h
ISSN2044-4753
E-ISSN2408-9834
Appears in Collections:(IIQ) Artículos
Files in This Item:
File Description SizeFormat 
c9cy02172h.pdf4,44 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.