Soluble Platinum Nanoparticles Ligated by Long-Chain N-Heterocyclic Carbenes as Catalysts.
Luis Miguel Martínez-PrietoLena RakersAngela M López-VinascoIsrael CanoYannick CoppelKarine PhilippotFrank GloriusBruno ChaudretPiet W N M van LeeuwenPublished in: Chemistry (Weinheim an der Bergstrasse, Germany) (2017)
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.
Keyphrases
- high resolution
- solid state
- simultaneous determination
- mass spectrometry
- magnetic resonance
- liquid chromatography
- tandem mass spectrometry
- magnetic resonance imaging
- oxide nanoparticles
- high speed
- high resolution mass spectrometry
- living cells
- single molecule
- single cell
- dual energy
- fluorescent probe
- gas chromatography
- transition metal