Experimental and Theoretical Study of the Reactivity of Gold Nanoparticles Towards Benzimidazole-2-ylidene Ligands.
María Rodríguez-CastilloGustavo Lugo-PreciadoDanielle LaurencinFrederik TielensArie van der LeeSébastien ClémentYannick GuariJosé M López-de-LuzuriagaMiguel MongeFrançoise RemacleSébastien RicheterPublished in: Chemistry (Weinheim an der Bergstrasse, Germany) (2016)
The reactivity of benzimidazol-2-ylidenes with respect to gold nanoparticles (AuNPs) has been investigated using a combined experimental and computational approach. First, the grafting of benzimidazol-2-ylidenes bearing benzyl groups on the nitrogen atoms is described, and comparisons are made with structurally similar N-heterocyclic carbenes (NHCs) bearing other N-groups. Similar reactivity was observed for all NHCs, with 1) the erosion of the AuNPs under the effect of the NHC and 2) the formation of bis(NHC) gold complexes. DFT calculations were performed to investigate the modes of grafting of such ligands, to determine adsorption energies, and to rationalize the spectroscopic data. Two types of computational models were developed to describe the grafting onto large or small AuNPs, with either periodic or cluster-type DFT calculations. Calculations of NMR parameters were performed on some of these models, and discussed in light of the experimental data.
Keyphrases
- density functional theory
- gold nanoparticles
- molecular docking
- molecular dynamics
- molecular dynamics simulations
- electronic health record
- big data
- reduced graphene oxide
- magnetic resonance
- high resolution
- monte carlo
- data analysis
- mass spectrometry
- solid state
- silver nanoparticles
- atomic force microscopy
- high speed