Experimental and Theoretical Study of the Reactivity of Gold Nanoparticles Towards Benzimidazole‐2‐ylidene Ligands |
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| Authors: | Dr. María Rodríguez‐Castillo Gustavo Lugo‐Preciado Dr. Danielle Laurencin Dr. Frederik Tielens Dr. Arie van der Lee Dr. Sébastien Clément Dr. Yannick Guari Dr. José M. López‐de‐Luzuriaga Dr. Miguel Monge Dr. Françoise Remacle Dr. Sébastien Richeter |
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| Affiliation: | 1. Institut Charles Gerhardt, UMR 5253 CNRS-ENSCM-UM, CC 1701, Université de Montpellier, Montpellier Cedex 05, France;2. Chemistry Department, B6c, University of Liège, Liège, Belgium;3. Sorbonne Université, UPMC Université Paris 06, UMR 7574, Laboratoire Chimie de la Matière Condensée de Paris, Collège de France, Paris Cedex 05, France;4. Institut Européen des Membranes, UMR 5635 CNRS-ENSCM-UM, Université de Montpellier, Montpellier Cedex 05, France;5. Departamento de Química, Grupo de Síntesis Química de la Rioja, UA-CSIC, Complejo Científico-Tecnológico, Universidad de La Rioja, Logro?o, Spain |
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| Abstract: | 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. |
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| Keywords: | carbenes DFT gold nanoparticles surface |
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