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Chiral Supramolecular Nanotubes of Single-Chain Magnets.
Houard, Felix; Evrard, Quentin; Calvez, Guillaume; Suffren, Yan; Daiguebonne, Carole; Guillou, Olivier; Gendron, Frédéric; Le Guennic, Boris; Guizouarn, Thierry; Dorcet, Vincent; Mannini, Matteo; Bernot, Kevin.
Afiliação
  • Houard F; Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35000, Rennes, France.
  • Evrard Q; Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35000, Rennes, France.
  • Calvez G; Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35000, Rennes, France.
  • Suffren Y; Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35000, Rennes, France.
  • Daiguebonne C; Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35000, Rennes, France.
  • Guillou O; Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35000, Rennes, France.
  • Gendron F; Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35000, Rennes, France.
  • Le Guennic B; Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35000, Rennes, France.
  • Guizouarn T; Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35000, Rennes, France.
  • Dorcet V; Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35000, Rennes, France.
  • Mannini M; Laboratory for Molecular Magnetism (LA.M.M.), Dipartimento di Chimica "Ugo Schiff", Università degli Studi di Firenze, INSTM, UdR Firenze, Via della Lastruccia n. 3, Sesto Fiorentino (FI), 50019, Italy.
  • Bernot K; Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35000, Rennes, France.
Angew Chem Int Ed Engl ; 59(2): 780-784, 2020 Jan 07.
Artigo em Inglês | MEDLINE | ID: mdl-31682058
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 TbIII 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 (Hc =2400 Oe MR =2.09 µB at 0.5 K) for this class of compounds.

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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Idioma: Inglês Revista: Angew Chem Int Ed Engl Ano de publicação: 2020 Tipo de documento: Artigo País de afiliação: França