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Chiral Supramolecular Nanotubes of Single‐Chain Magnets
Author(s) -
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
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201913019
Subject(s) - supramolecular chemistry , remanence , materials science , magnet , ab initio , chain (unit) , anisotropy , crystallography , ab initio quantum chemistry methods , ising model , coercivity , condensed matter physics , single chain , relaxation (psychology) , isotropy , nanotechnology , magnetic field , chemistry , magnetization , physics , crystal structure , organic chemistry , quantum mechanics , molecule , psychology , social psychology , antibody , immunology , biology
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.