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Unraveling the core-shell structure of ligand-capped Sn/SnOx nanoparticles by surface-enhanced nuclear magnetic resonance, Mössbauer, and X-ray absorption spectroscopies.

ACS nano

Protesescu L, Rossini AJ, Kriegner D, Valla M, de Kergommeaux A, Walter M, Kravchyk KV, Nachtegaal M, Stangl J, Malaman B, Reiss P, Lesage A, Emsley L, Copéret C, Kovalenko MV.
PMID: 24494636
ACS Nano. 2014 Mar 25;8(3):2639-48. doi: 10.1021/nn406344n. Epub 2014 Feb 04.

A particularly difficult challenge in the chemistry of nanomaterials is the detailed structural and chemical analysis of multicomponent nano-objects. This is especially true for the determination of spatially resolved information. In this study, we demonstrate that dynamic nuclear polarization...

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Protesescu L, Rossini AJ, Kriegner D, et al. Unraveling the core-shell structure of ligand-capped Sn/SnOx nanoparticles by surface-enhanced nuclear magnetic resonance, Mössbauer, and X-ray absorption spectroscopies. ACS Nano. 2014;8(3):2639-48doi: 10.1021/nn406344n.
Protesescu, L., Rossini, A. J., Kriegner, D., Valla, M., de Kergommeaux, A., Walter, M., Kravchyk, K. V., Nachtegaal, M., Stangl, J., Malaman, B., Reiss, P., Lesage, A., Emsley, L., Copéret, C., & Kovalenko, M. V. (2014). Unraveling the core-shell structure of ligand-capped Sn/SnOx nanoparticles by surface-enhanced nuclear magnetic resonance, Mössbauer, and X-ray absorption spectroscopies. ACS nano, 8(3), 2639-48. https://doi.org/10.1021/nn406344n
Protesescu, Loredana, et al. "Unraveling the core-shell structure of ligand-capped Sn/SnOx nanoparticles by surface-enhanced nuclear magnetic resonance, Mössbauer, and X-ray absorption spectroscopies." ACS nano vol. 8,3 (2014): 2639-48. doi: https://doi.org/10.1021/nn406344n
Protesescu L, Rossini AJ, Kriegner D, Valla M, de Kergommeaux A, Walter M, Kravchyk KV, Nachtegaal M, Stangl J, Malaman B, Reiss P, Lesage A, Emsley L, Copéret C, Kovalenko MV. Unraveling the core-shell structure of ligand-capped Sn/SnOx nanoparticles by surface-enhanced nuclear magnetic resonance, Mössbauer, and X-ray absorption spectroscopies. ACS Nano. 2014 Mar 25;8(3):2639-48. doi: 10.1021/nn406344n. Epub 2014 Feb 04. PMID: 24494636.
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Atomistic description of thiostannate-capped CdSe nanocrystals: retention of four-coordinate SnS4 motif and preservation of Cd-rich stoichiometry.

Journal of the American Chemical Society

Protesescu L, Nachtegaal M, Voznyy O, Borovinskaya O, Rossini AJ, Emsley L, Copéret C, Günther D, Sargent EH, Kovalenko MV.
PMID: 25597625
J Am Chem Soc. 2015 Feb 11;137(5):1862-74. doi: 10.1021/ja510862c. Epub 2015 Jan 29.

Colloidal semiconductor nanocrystals (NCs) are widely studied as building blocks for novel solid-state materials. Inorganic surface functionalization, used to displace native organic capping ligands from NC surfaces, has been a major enabler of electronic solid-state devices based on colloidal...

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Protesescu L, Nachtegaal M, Voznyy O, et al. Atomistic description of thiostannate-capped CdSe nanocrystals: retention of four-coordinate SnS4 motif and preservation of Cd-rich stoichiometry. J Am Chem Soc. 2015;137(5):1862-74doi: 10.1021/ja510862c.
Protesescu, L., Nachtegaal, M., Voznyy, O., Borovinskaya, O., Rossini, A. J., Emsley, L., Copéret, C., Günther, D., Sargent, E. H., & Kovalenko, M. V. (2015). Atomistic description of thiostannate-capped CdSe nanocrystals: retention of four-coordinate SnS4 motif and preservation of Cd-rich stoichiometry. Journal of the American Chemical Society, 137(5), 1862-74. https://doi.org/10.1021/ja510862c
Protesescu, Loredana, et al. "Atomistic description of thiostannate-capped CdSe nanocrystals: retention of four-coordinate SnS4 motif and preservation of Cd-rich stoichiometry." Journal of the American Chemical Society vol. 137,5 (2015): 1862-74. doi: https://doi.org/10.1021/ja510862c
Protesescu L, Nachtegaal M, Voznyy O, Borovinskaya O, Rossini AJ, Emsley L, Copéret C, Günther D, Sargent EH, Kovalenko MV. Atomistic description of thiostannate-capped CdSe nanocrystals: retention of four-coordinate SnS4 motif and preservation of Cd-rich stoichiometry. J Am Chem Soc. 2015 Feb 11;137(5):1862-74. doi: 10.1021/ja510862c. Epub 2015 Jan 29. PMID: 25597625; PMCID: PMC4525771.
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Enhanced photo-responsiveness in a photoswitchable system model: emergent hormetic catalysis.

Physical chemistry chemical physics : PCCP

Micheau JC, Coudret C.
PMID: 28474024
Phys Chem Chem Phys. 2017 May 24;19(20):12890-12897. doi: 10.1039/c7cp01470h.

Michaelis Menten catalysis by a T-photochromic system has been analyzed numerically. Using an appropriate set of rate constants and quantum yields, we have evidenced an enhanced photo-responsiveness at a medium light intensity: the plot of the initial rate vs....

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Micheau JC, Coudret C. Enhanced photo-responsiveness in a photoswitchable system model: emergent hormetic catalysis. Phys Chem Chem Phys. 2017;19(20):12890-12897doi: 10.1039/c7cp01470h.
Micheau, J. C., & Coudret, C. (2017). Enhanced photo-responsiveness in a photoswitchable system model: emergent hormetic catalysis. Physical chemistry chemical physics : PCCP, 19(20), 12890-12897. https://doi.org/10.1039/c7cp01470h
Micheau, J-C, and Coudret, C. "Enhanced photo-responsiveness in a photoswitchable system model: emergent hormetic catalysis." Physical chemistry chemical physics : PCCP vol. 19,20 (2017): 12890-12897. doi: https://doi.org/10.1039/c7cp01470h
Micheau JC, Coudret C. Enhanced photo-responsiveness in a photoswitchable system model: emergent hormetic catalysis. Phys Chem Chem Phys. 2017 May 24;19(20):12890-12897. doi: 10.1039/c7cp01470h. PMID: 28474024.
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Switching on the Metathesis Activity of Re Oxo Alkylidene Surface Sites through a Tailor-Made Silica-Alumina Support.

Angewandte Chemie (International ed. in English)

Valla M, Stadler D, Mougel V, Copéret C.
PMID: 26756446
Angew Chem Int Ed Engl. 2016 Jan 18;55(3):1124-7. doi: 10.1002/anie.201509390. Epub 2015 Dec 03.

Re oxo alkylidene surface species are putative active sites in classical heterogeneous Re-based alkene-metathesis catalysts. However, the lack of evidence for such species questions their existence and/or relevance as reaction intermediates. Using Re(O)(=CH-CH=CPh2)(OtBuF6)3(THF), the corresponding well-defined Re oxo alkylidene...

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Valla M, Stadler D, Mougel V, et al. Switching on the Metathesis Activity of Re Oxo Alkylidene Surface Sites through a Tailor-Made Silica-Alumina Support. Angew Chem Int Ed Engl. 2015;55(3):1124-7doi: 10.1002/anie.201509390.
Valla, M., Stadler, D., Mougel, V., & Copéret, C. (2016). Switching on the Metathesis Activity of Re Oxo Alkylidene Surface Sites through a Tailor-Made Silica-Alumina Support. Angewandte Chemie (International ed. in English), 55(3), 1124-7. https://doi.org/10.1002/anie.201509390
Valla, Maxence, et al. "Switching on the Metathesis Activity of Re Oxo Alkylidene Surface Sites through a Tailor-Made Silica-Alumina Support." Angewandte Chemie (International ed. in English) vol. 55,3 (2016): 1124-7. doi: https://doi.org/10.1002/anie.201509390
Valla M, Stadler D, Mougel V, Copéret C. Switching on the Metathesis Activity of Re Oxo Alkylidene Surface Sites through a Tailor-Made Silica-Alumina Support. Angew Chem Int Ed Engl. 2016 Jan 18;55(3):1124-7. doi: 10.1002/anie.201509390. Epub 2015 Dec 03. PMID: 26756446.
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[Au5Mes5]: improved gram-scale synthesis and its use as a convenient precursor for halide-free supported gold nanoparticles.

Dalton transactions (Cambridge, England : 2003)

Siddiqi G, Mougel V, Copéret C.
PMID: 26200206
Dalton Trans. 2015 Aug 28;44(32):14349-53. doi: 10.1039/c5dt01432h.

A simple one-step and gram-scale synthesis of [Au5Mes5] from AuCl3 was developed, and this molecular precursor was used to generate Au nanoparticles on SiO2 and Al2O3. While [Au5Mes5] does not react with surface silanols and is only physisorbed, its...

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Siddiqi G, Mougel V, Copéret C. [Au5Mes5]: improved gram-scale synthesis and its use as a convenient precursor for halide-free supported gold nanoparticles. Dalton Trans. 2015;44(32):14349-53doi: 10.1039/c5dt01432h.
Siddiqi, G., Mougel, V., & Copéret, C. (2015). [Au5Mes5]: improved gram-scale synthesis and its use as a convenient precursor for halide-free supported gold nanoparticles. Dalton transactions (Cambridge, England : 2003), 44(32), 14349-53. https://doi.org/10.1039/c5dt01432h
Siddiqi, G, et al. "[Au5Mes5]: improved gram-scale synthesis and its use as a convenient precursor for halide-free supported gold nanoparticles." Dalton transactions (Cambridge, England : 2003) vol. 44,32 (2015): 14349-53. doi: https://doi.org/10.1039/c5dt01432h
Siddiqi G, Mougel V, Copéret C. [Au5Mes5]: improved gram-scale synthesis and its use as a convenient precursor for halide-free supported gold nanoparticles. Dalton Trans. 2015 Aug 28;44(32):14349-53. doi: 10.1039/c5dt01432h. PMID: 26200206.
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Silica-Supported Cu Nanoparticle Catalysts for Alkyne Semihydrogenation: Effect of Ligands on Rates and Selectivity.

Journal of the American Chemical Society

Fedorov A, Liu HJ, Lo HK, Copéret C.
PMID: 27998097
J Am Chem Soc. 2016 Dec 21;138(50):16502-16507. doi: 10.1021/jacs.6b10817. Epub 2016 Dec 07.

Narrowly dispersed, silica-supported Cu nanoparticles (ca. 2 nm) prepared via surface organometallic chemistry from a mesityl complex [Cu

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Fedorov A, Liu HJ, Lo HK, et al. Silica-Supported Cu Nanoparticle Catalysts for Alkyne Semihydrogenation: Effect of Ligands on Rates and Selectivity. J Am Chem Soc. 2016;138(50):16502-16507doi: 10.1021/jacs.6b10817.
Fedorov, A., Liu, H. J., Lo, H. K., & Copéret, C. (2016). Silica-Supported Cu Nanoparticle Catalysts for Alkyne Semihydrogenation: Effect of Ligands on Rates and Selectivity. Journal of the American Chemical Society, 138(50), 16502-16507. https://doi.org/10.1021/jacs.6b10817
Fedorov, Alexey, et al. "Silica-Supported Cu Nanoparticle Catalysts for Alkyne Semihydrogenation: Effect of Ligands on Rates and Selectivity." Journal of the American Chemical Society vol. 138,50 (2016): 16502-16507. doi: https://doi.org/10.1021/jacs.6b10817
Fedorov A, Liu HJ, Lo HK, Copéret C. Silica-Supported Cu Nanoparticle Catalysts for Alkyne Semihydrogenation: Effect of Ligands on Rates and Selectivity. J Am Chem Soc. 2016 Dec 21;138(50):16502-16507. doi: 10.1021/jacs.6b10817. Epub 2016 Dec 07. PMID: 27998097.
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Understanding the Lewis Acidity of Co(II) Sites on a Silica Surface.

Inorganic chemistry

Estes DP, Cook AK, Lam E, Wong L, Copéret C.
PMID: 28671845
Inorg Chem. 2017 Jul 17;56(14):7731-7736. doi: 10.1021/acs.inorgchem.7b00443. Epub 2017 Jul 03.

Heterogeneous catalysts consisting of isolated transition-metal sites dispersed on the surface of metal oxide supports are commonly used in the chemical industry. Often their reactivity relies on the Lewis acidity of the active sites on the surface of the...

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Estes DP, Cook AK, Lam E, et al. Understanding the Lewis Acidity of Co(II) Sites on a Silica Surface. Inorg Chem. 2017;56(14):7731-7736doi: 10.1021/acs.inorgchem.7b00443.
Estes, D. P., Cook, A. K., Lam, E., Wong, L., & Copéret, C. (2017). Understanding the Lewis Acidity of Co(II) Sites on a Silica Surface. Inorganic chemistry, 56(14), 7731-7736. https://doi.org/10.1021/acs.inorgchem.7b00443
Estes, Deven P, et al. "Understanding the Lewis Acidity of Co(II) Sites on a Silica Surface." Inorganic chemistry vol. 56,14 (2017): 7731-7736. doi: https://doi.org/10.1021/acs.inorgchem.7b00443
Estes DP, Cook AK, Lam E, Wong L, Copéret C. Understanding the Lewis Acidity of Co(II) Sites on a Silica Surface. Inorg Chem. 2017 Jul 17;56(14):7731-7736. doi: 10.1021/acs.inorgchem.7b00443. Epub 2017 Jul 03. PMID: 28671845.
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Structure of Colloidal Quantum Dots from Dynamic Nuclear Polarization Surface Enhanced NMR Spectroscopy.

Journal of the American Chemical Society

Piveteau L, Ong TC, Rossini AJ, Emsley L, Copéret C, Kovalenko MV.
PMID: 26473384
J Am Chem Soc. 2015 Nov 04;137(43):13964-71. doi: 10.1021/jacs.5b09248. Epub 2015 Oct 23.

Understanding the chemistry of colloidal quantum dots (QDs) is primarily hampered by the lack of analytical methods to selectively and discriminately probe the QD core, QD surface and capping ligands. Here, we present a general concept for studying a...

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Piveteau L, Ong TC, Rossini AJ, et al. Structure of Colloidal Quantum Dots from Dynamic Nuclear Polarization Surface Enhanced NMR Spectroscopy. J Am Chem Soc. 2015;137(43):13964-71doi: 10.1021/jacs.5b09248.
Piveteau, L., Ong, T. C., Rossini, A. J., Emsley, L., Copéret, C., & Kovalenko, M. V. (2015). Structure of Colloidal Quantum Dots from Dynamic Nuclear Polarization Surface Enhanced NMR Spectroscopy. Journal of the American Chemical Society, 137(43), 13964-71. https://doi.org/10.1021/jacs.5b09248
Piveteau, Laura, et al. "Structure of Colloidal Quantum Dots from Dynamic Nuclear Polarization Surface Enhanced NMR Spectroscopy." Journal of the American Chemical Society vol. 137,43 (2015): 13964-71. doi: https://doi.org/10.1021/jacs.5b09248
Piveteau L, Ong TC, Rossini AJ, Emsley L, Copéret C, Kovalenko MV. Structure of Colloidal Quantum Dots from Dynamic Nuclear Polarization Surface Enhanced NMR Spectroscopy. J Am Chem Soc. 2015 Nov 04;137(43):13964-71. doi: 10.1021/jacs.5b09248. Epub 2015 Oct 23. PMID: 26473384.
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The Role of Proton Transfer in Heterogeneous Transformations of Hydrocarbons.

Chimia

Estes DP, Copéret C.
PMID: 26507476
Chimia (Aarau). 2015;69(6):321-6. doi: 10.2533/chimia.2015.321.

Heterogeneous catalysis is essential for the transformation of light hydrocarbons into chemical feedstocks. Many of the catalysts that mediate these transformations consist of isolated metal ions on the surface of a metal oxide support, such as silica or alumina....

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Estes DP, Copéret C. The Role of Proton Transfer in Heterogeneous Transformations of Hydrocarbons. Chimia (Aarau). 2015;69(6):321-6doi: 10.2533/chimia.2015.321.
Estes, D. P., & Copéret, C. (2015). The Role of Proton Transfer in Heterogeneous Transformations of Hydrocarbons. Chimia, 69(6), 321-6. https://doi.org/10.2533/chimia.2015.321
Estes, Deven P, and Copéret, Christophe. "The Role of Proton Transfer in Heterogeneous Transformations of Hydrocarbons." Chimia vol. 69,6 (2015): 321-6. doi: https://doi.org/10.2533/chimia.2015.321
Estes DP, Copéret C. The Role of Proton Transfer in Heterogeneous Transformations of Hydrocarbons. Chimia (Aarau). 2015;69(6):321-6. doi: 10.2533/chimia.2015.321. PMID: 26507476.
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Proton transfers are key elementary steps in ethylene polymerization on isolated chromium(III) silicates.

Proceedings of the National Academy of Sciences of the United States of America

Delley MF, Núñez-Zarur F, Conley MP, Comas-Vives A, Siddiqi G, Norsic S, Monteil V, Safonova OV, Copéret C.
PMID: 25002479
Proc Natl Acad Sci U S A. 2014 Aug 12;111(32):11624-9. doi: 10.1073/pnas.1405314111. Epub 2014 Jul 07.

Mononuclear Cr(III) surface sites were synthesized from grafting [Cr(OSi(O(t)Bu)3)3(tetrahydrofurano)2] on silica partially dehydroxylated at 700 °C, followed by a thermal treatment under vacuum, and characterized by infrared, ultraviolet-visible, electron paramagnetic resonance (EPR), and X-ray absorption spectroscopy (XAS). These sites...

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Delley MF, Núñez-Zarur F, Conley MP, et al. Proton transfers are key elementary steps in ethylene polymerization on isolated chromium(III) silicates. Proc Natl Acad Sci U S A. 2014;111(32):11624-9doi: 10.1073/pnas.1405314111.
Delley, M. F., Núñez-Zarur, F., Conley, M. P., Comas-Vives, A., Siddiqi, G., Norsic, S., Monteil, V., Safonova, O. V., & Copéret, C. (2014). Proton transfers are key elementary steps in ethylene polymerization on isolated chromium(III) silicates. Proceedings of the National Academy of Sciences of the United States of America, 111(32), 11624-9. https://doi.org/10.1073/pnas.1405314111
Delley, Murielle F, et al. "Proton transfers are key elementary steps in ethylene polymerization on isolated chromium(III) silicates." Proceedings of the National Academy of Sciences of the United States of America vol. 111,32 (2014): 11624-9. doi: https://doi.org/10.1073/pnas.1405314111
Delley MF, Núñez-Zarur F, Conley MP, Comas-Vives A, Siddiqi G, Norsic S, Monteil V, Safonova OV, Copéret C. Proton transfers are key elementary steps in ethylene polymerization on isolated chromium(III) silicates. Proc Natl Acad Sci U S A. 2014 Aug 12;111(32):11624-9. doi: 10.1073/pnas.1405314111. Epub 2014 Jul 07. PMID: 25002479; PMCID: PMC4136591.
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Predictive morphology, stoichiometry and structure of surface species in supported Ru nanoparticles under H2 and CO atmospheres from combined experimental and DFT studies.

Physical chemistry chemical physics : PCCP

Comas-Vives A, Furman K, Gajan D, Akatay MC, Lesage A, Ribeiro FH, Copéret C.
PMID: 26686546
Phys Chem Chem Phys. 2016 Jan 21;18(3):1969-79. doi: 10.1039/c5cp06710c. Epub 2015 Dec 21.

Further understanding of the chemisorption properties towards CO and H2 on silica-supported Ru nanoparticles is crucial in order to rationalize their high activity towards methanation, Fischer Tropsch and Water Gas Shift reactions. Ru nanoparticles having the same chemisorption properties...

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Comas-Vives A, Furman K, Gajan D, et al. Predictive morphology, stoichiometry and structure of surface species in supported Ru nanoparticles under H2 and CO atmospheres from combined experimental and DFT studies. Phys Chem Chem Phys. 2015;18(3):1969-79doi: 10.1039/c5cp06710c.
Comas-Vives, A., Furman, K., Gajan, D., Akatay, M. C., Lesage, A., Ribeiro, F. H., & Copéret, C. (2016). Predictive morphology, stoichiometry and structure of surface species in supported Ru nanoparticles under H2 and CO atmospheres from combined experimental and DFT studies. Physical chemistry chemical physics : PCCP, 18(3), 1969-79. https://doi.org/10.1039/c5cp06710c
Comas-Vives, Aleix, et al. "Predictive morphology, stoichiometry and structure of surface species in supported Ru nanoparticles under H2 and CO atmospheres from combined experimental and DFT studies." Physical chemistry chemical physics : PCCP vol. 18,3 (2016): 1969-79. doi: https://doi.org/10.1039/c5cp06710c
Comas-Vives A, Furman K, Gajan D, Akatay MC, Lesage A, Ribeiro FH, Copéret C. Predictive morphology, stoichiometry and structure of surface species in supported Ru nanoparticles under H2 and CO atmospheres from combined experimental and DFT studies. Phys Chem Chem Phys. 2016 Jan 21;18(3):1969-79. doi: 10.1039/c5cp06710c. Epub 2015 Dec 21. PMID: 26686546.
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Terahertz Time-Domain Spectroscopy of Thermoresponsive Polymers in Aqueous Solution.

The journal of physical chemistry. B

Serin G, Nguyen HH, Marty JD, Micheau JC, Gernigon V, Mingotaud AF, Bajon D, Soulet T, Massenot S, Coudret C.
PMID: 27490372
J Phys Chem B. 2016 Sep 15;120(36):9778-87. doi: 10.1021/acs.jpcb.6b06859. Epub 2016 Sep 02.

The behavior of highly concentrated aqueous solutions of two thermoresponsive polymers poly(N-isopropylacrylamide) (PNIPAm) and poly(N-vinylcaprolactam) (PVCL) have been investigated by terahertz time-domain spectroscopy (THz-TDS). Measurements have been performed for concentrations up to 20 wt %, over a frequency range...

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Serin G, Nguyen HH, Marty JD, et al. Terahertz Time-Domain Spectroscopy of Thermoresponsive Polymers in Aqueous Solution. J Phys Chem B. 2016;120(36):9778-87doi: 10.1021/acs.jpcb.6b06859.
Serin, G., Nguyen, H. H., Marty, J. D., Micheau, J. C., Gernigon, V., Mingotaud, A. F., Bajon, D., Soulet, T., Massenot, S., & Coudret, C. (2016). Terahertz Time-Domain Spectroscopy of Thermoresponsive Polymers in Aqueous Solution. The journal of physical chemistry. B, 120(36), 9778-87. https://doi.org/10.1021/acs.jpcb.6b06859
Serin, Guillaume, et al. "Terahertz Time-Domain Spectroscopy of Thermoresponsive Polymers in Aqueous Solution." The journal of physical chemistry. B vol. 120,36 (2016): 9778-87. doi: https://doi.org/10.1021/acs.jpcb.6b06859
Serin G, Nguyen HH, Marty JD, Micheau JC, Gernigon V, Mingotaud AF, Bajon D, Soulet T, Massenot S, Coudret C. Terahertz Time-Domain Spectroscopy of Thermoresponsive Polymers in Aqueous Solution. J Phys Chem B. 2016 Sep 15;120(36):9778-87. doi: 10.1021/acs.jpcb.6b06859. Epub 2016 Sep 02. PMID: 27490372.
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