Publications
| 2024 (2) | 2023 (5) | 2022 (3) | 2021 (5) |
| 2020 (3) | 2019 (12) | 2018 (5) | 2017 (3) |
| 2016 (4) | 2015 (2) | 2014 (4) | 2013 (7) |
| 2012 (7) | 2011 (1) | 2010 (2) | 2008 (1) |
2023 | Articles and Reviews
Phosphine-Enhanced Semi-Hydrogenation of Phenylacetylene by Cobalt Phosphide Nano-Urchins
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We report the positive effect of phosphine additives on the activity of cobalt phosphide nano-urchins for the semi-hydrogenation of phenylacetylene. While the nanocatalyst's activity was low under mild conditions (7 bar of H2, 100 °C), the addition of a catalytic amount of phosphine remarkably increased the conversion, e. g., from 13 % to 98 % in the case of PnBu3. A stereo-electronic map was proposed: the strongest effect was observed for low to moderately hindered phosphines, associated with strong electron donor abilities. |
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A. Ropp, R. F. André, S. Carenco, ChemPlusChem 2023, DOI 10.1002/cplu.202300469. |
From Ce(OH)3 to Nanoscaled CeO2: Identification and Crystal Structure of a Cerium Oxyhydroxide Intermediate Phase
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While the literature contains tens of protocols to prepare cerium oxide nanoparticles from Ce(III) precursors, there is still an open question regarding the time at which the cerium oxidation occurs and the role of hydroxide phases in this process. This article identifies an oxyhydroxide phase of Ce(IV) of the chemical formula CeO(OH)2 as a key intermediate and proposes a crystal structure for it. |
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R. F. André, G. Rousse, C. Sassoye, M. Avdeev, B. Lassalle-Kaiser, B. Baptiste and S. Carenco, Chem. Mater. 2023, DOI 10.1021/acs.chemmater.3c00486. |
Influence of the Cobalt Active Site Neighbors in NiCo Nanocatalysts for Phosphine-Assisted Silane Activation
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NiCo nanoparticles are active catalysts at room temperature for Si−H bond activation. We designed nanoparticles with a nickel core and a limited amount of cobalt surface sites to clarify which of the two metals was the active site and if the neighbouring atoms influenced the reaction efficiency. The trend in catalytic activity is consistent with cobalt being the active site, and it shows a higher activity when its immediate neighbours are cobalt atoms. |
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A. Ropp, S. Carenco, ChemCatChem 2023, DOI 10.1002/cctc.202300400. |
Phosphine-Catalyzed Activation of Phenylsilane for Benzaldehyde Reduction
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Here, we studied the organocatalyzed hydrosilylation of benzaldehyde with a phosphine, introduced at 10 mol %, and phenylsilane at room temperature. The best results of the screening over 13 phosphines and phosphites were obtained with linear trialkylphoshines (PMe3, PnBu3, POct3), indicating the importance of their nucleophilicity. The products of the hydrosilylation were identified, allowing a monitoring of the concentration in the different species. |
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R. F. André, A. Palazzolo, C. Poucin, F. Ribot, S. Carenco, ChemPlusChem 2023, doi 10.1002/cplu.202300038 |
Optical-Quality Thin Films with Tunable Thickness from Stable Colloidal Suspensions of Lanthanide Oxysulfide Nanoplates
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We developed here thin films of lanthanide oxysulfide, of optical quality by dip coating. As a model compound in the family of oxysulfides, (Gd,Ce)2O2S anisotropic nanoplates were used. The band gap of the materials was preserved through the deposition process. The thickness of the films was tuned in a broad range, from a few nanometers to 150 nm, using different concentrations of the colloidal suspensions and single-layer and multilayer deposition. Lastly, thermal treatment of the thin films was optimized to remove the stabilizing organic ligands of the nanoparticles while preserving their integrity. |
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L. Meyniel, C. Boissière, N. Krins, S. Carenco, Langmuir 2023, 39, 728-738, doi 10.1021/acs.langmuir.2c02026 |
