Supramolecular nanocapsules as two-fold stabilizers of outer-cavity sub-nanometric Ru NPs and inner-cavity ultra-small Ru clusters
| Autor: | Ernest Ubasart, Irene Mustieles Marin, Juan Manuel Asensio, Gabriel Mencia, Ángela M. López-Vinasco, Cristina García-Simón, Iker del Rosal, Romuald Poteau, Bruno Chaudret, Xavi Ribas |
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| Přispěvatelé: | Agencia Estatal de Investigación |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | © Nanoscale Horizons, 2022, vol. 2022, num. Advance Article Articles publicats (D-Q) Ubasart, Ernest Mustieles Marin, Irene Asensio, Juan Manuel Mencia, Gabriel López-Vinasco, Ángela M. García Simón, Cristina Rosal, Iker del Poteau, Romuald Chaudret, Bruno Ribas Salamaña, Xavi 2022 Supramolecular nanocapsules as two-fold stabilizers of outer-cavity sub-nanometric Ru NPs and inner-cavity ultra-small Ru clusters Nanoscale Horizons 2022 Advance Article DUGiDocs – Universitat de Girona instname Nanoscale Horizons |
| ISSN: | 2055-6764 |
| Popis: | The synthesis of metallic nanoparticles (MNP) with high surface area and controlled shape is of paramount importance to increase their catalytic performance. The detailed growing process of NP is mostly unknown and understanding the specific steps would pave the way for a rational synthesis of the desired MNP. Here we take advantage of the stabilization properties exerted by the tetragonal prismatic supramolecular nanocapsule 8·(BArF)8 to develop a synthetic methodology for sub-nanometric RuNP (0.6-0.7 nm). The catalytic properties of these sub-nanometric nanoparticles were tested on the hydrogenation of styrene, obtaining excellent selectivity for the hydrogenation of the alkene moiety. In addition, the encapsulation of [Ru5] clusters inside the nanocapsule is strikingly observed in most of the experimental conditions, as ascertained by HR-MS. Moreover, a thorough DFT study enlightens the nature of the [Ru5] clusters as tb-Ru5H2(η6-PhH)2(η6-pyz)3 (2) trapped by two arene moieties of the clip, or as tb-Ru5H2(η1-pyz)6(η6-pyz)3 (3) trapped between the two Zn-porphyrin units of the nanocapsule. Both options fulfill the Wade-Mingos counting rules, i.e. 72 CVEs for the closo tb. The trapped [Ru5] metallic clusters are proposed to be the first-grown seeds of subsequent formation of the subnanometric RuNP. Moreover, the double role of the nanocapsule in stabilising ∼0.7 nm NPs and also in hosting ultra-small Ru clusters, is unprecedented and may pave the way towards the synthesis of ultra-small metallic clusters for catalytic purposes This work was supported by grants from MINECO-Spain (PID2019-104498GB-I00 and EQC2018-004422-P) and Generalitat de Catalunya (2017SGR264) to X.R. E.U. thanks UdG for a PhD grant. CNRS, INSAT and UT3-UPS are also acknowledged for financial support. I.d.R. and R.P. thank the HPC CALcul en MIdi-Pyrénées (CALMIP, OLYMPE machine, grant P0611) for a very generous allocation of computer time on this project. IMM, JMA and BC thank ERC Advanced Grant (MONACAT 2015-694159) for financial support. X. R. also thanks ICREA-Acadèmia awards |
| Databáze: | OpenAIRE |
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