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Soluble Platinum Nanoparticles Ligated by Long‐Chain N‐Heterocyclic Carbenes as Catalysts
Author(s) -
MartínezPrieto Luis M.,
Rakers Lena,
LópezVinasco Angela M.,
Cano Israel,
Coppel Yannick,
Philippot Karine,
Glorius Frank,
Chaudret Bruno,
van Leeuwen Piet W. N. M.
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201702288
Subject(s) - phenylacetylene , chemistry , catalysis , platinum nanoparticles , hydroboration , x ray photoelectron spectroscopy , platinum , nanoparticle , molecule , nuclear magnetic resonance spectroscopy , selectivity , polymer chemistry , stereochemistry , organic chemistry , chemical engineering , nanotechnology , materials science , engineering
Soluble platinum nanoparticles (Pt NPs) ligated by two different long‐chain N‐heterocyclic carbenes (LC‐IPr and LC‐IMe) were synthesized and fully characterized by TEM, high‐resolution TEM, wide‐angle X‐ray scattering (WAXS), X‐ray photoelectron spectroscopy (XPS), and solution NMR. The surface chemistry of these NPs (Pt@LC‐IPr and Pt@LC‐IMe) was investigated by FT‐IR and solid state NMR using CO as a probe molecule. A clear influence of the bulkiness of the N‐substituents on the size, surface state, and catalytic activity of these Pt NPs was observed. While Pt@LC‐IMe showed no activity in the hydroboration of phenylacetylene, Pt@LC‐IPr revealed good selectivity for the trans ‐isomer, which may be supported by a homogeneous species. This is the first example of hydroboration of acetylenes catalyzed by non‐supported Pt NPs.