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13 results on '"Houard, Felix"'

2. Investigation and control of metallogel formation for the deposition of supramolecular nanotubes of single-chain magnets.

Author

Houard, Felix, Olivier, Andrea, Cucinotta, Giuseppe, Galangau, Olivier, Gautier, Marie, Camerel, Franck, Guizouarn, Thierry, Roisnel, Thierry, Le Guennic, Boris, Ozerov, Mykhaylo, Suffren, Yan, Calvez, Guillaume, Daiguebonne, Carole, Guillou, Olivier, Artzner, Franck, Mannini, Matteo, and Bernot, Kevin

Abstract

Metallogels are versatile and intriguing objects that can be used as media for the deposition of extended molecular architectures on surfaces. In this work, we investigate the thermodynamic and kinetics conditions that induce robust metallogel formation from supramolecular nanotubes of single-chain magnets (SCM). These latter are made of woven chains that alternate Tb and nitronyl-nitroxide radical building blocks. By tailoring the size of the alkyl chain grafted on the radical (NITPhOCn, with n = 6, 10, or 18) we show that long alkyl chains induce delicate gelation conditions but provide gels with improved stability against crystallization and enhanced deposition ability while preserving the overall SCM behaviour of the molecular nanotubes. [ABSTRACT FROM AUTHOR]

Published
2024
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5. A photochromic metallacycle with highly anisotropic Dy–F magnetic units.

Author

El Beyrouti, Nour, Houard, Felix, Cordier, Marie, Trzop, Elzbieta, Rigaut, Stéphane, Le Guennic, Boris, Bernot, Kevin, and Norel, Lucie

Subjects
*SINGLE molecule magnets, *MAGNETIC hysteresis, *SINGLE crystals, *PHOTOISOMERIZATION, *DYSPROSIUM
Abstract

A dinuclear metallacycle assembled from a bispyridyl dithienylethene linker and a highly anisotropic dysprosium based Single Molecule Magnet (SMM) shows magnetic hysteresis at 1.8 K together with photoisomerization in single crystals (SC). The impact of photoswitching on the SMM behavior is evidenced and related to the specific organization of the magnetic units. [ABSTRACT FROM AUTHOR]

Published
2023
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7. Single-chain magnet behavior in a finite linear hexanuclear molecule

Author

Houard, Felix, primary, Gendron, Frederic, additional, Suffren, Yan, additional, Guizouarn, Thierry, additional, Dorcet, Vincent, additional, Calvez, Guillaume, additional, Daiguebonne, Carole, additional, Guillou, Olivier, additional, Le Guennic, Boris, additional, Mannini, Matteo, additional, and Bernot, Kevin, additional

Published
2021
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10. Chiral Supramolecular Nanotubes of Single‐Chain Magnets

Author

Houard, Felix, primary, Evrard, Quentin, additional, Calvez, Guillaume, additional, Suffren, Yan, additional, Daiguebonne, Carole, additional, Guillou, Olivier, additional, Gendron, Frédéric, additional, Le Guennic, Boris, additional, Guizouarn, Thierry, additional, Dorcet, Vincent, additional, Mannini, Matteo, additional, and Bernot, Kevin, additional

Published
2020
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11. Self-assembly of a terbium(III) 1D coordination polymer on mica

Author

Evrard, Quentin, primary, Cucinotta, Giuseppe, additional, Houard, Felix, additional, Calvez, Guillaume, additional, Suffren, Yan, additional, Daiguebonne, Carole, additional, Guillou, Olivier, additional, Caneschi, Andrea, additional, Mannini, Matteo, additional, and Bernot, Kevin, additional

Published
2019
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12. Chiral Supramolecular Nanotubes of Single‐Chain Magnets

Author

Houard, Felix, primary, Evrard, Quentin, additional, Calvez, Guillaume, additional, Suffren, Yan, additional, Daiguebonne, Carole, additional, Guillou, Olivier, additional, Gendron, Frédéric, additional, Le Guennic, Boris, additional, Guizouarn, Thierry, additional, Dorcet, Vincent, additional, Mannini, Matteo, additional, and Bernot, Kevin, additional

Published
2019
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13. Chiral Supramolecular Nanotubes of Single-Chain Magnets.

Author

Houard F, Evrard Q, Calvez G, Suffren Y, Daiguebonne C, Guillou O, Gendron F, Le Guennic B, Guizouarn T, Dorcet V, Mannini M, and Bernot K

Abstract

We report a single-chain magnet (SCM) made of a terbium(III) building block and a nitronyl-nitroxide radical (NIT) functionalized with an aliphatic chain. This substitution is targeted to induce a long-range distortion of the polymeric chain and accordingly it gives rise to chains that are curled with almost 20 nm helical pitch. They self-organize as a chiral tubular superstructure made of 11 chains wound around each other. The supramolecular tubes have a 4.5 nm internal diameter. Overall, this forms a porous chiral network with almost 44 % porosity. Ab initio calculations highlight that each Tb III ion possesses high magnetic anisotropy. Indeed, notwithstanding the supramolecular arrangement each chain behaves as a SCM. Magnetic relaxation with both finite and infinite-size regimes is observed and confirms the validity of the Ising approximation. This is associated with quite strong coercive field and magnetic remanence (H c =2400 Oe M R =2.09 μ B at 0.5 K) for this class of compounds., (© 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)

Published
2020
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