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Journal articles
A supramolecular chain of dimeric Dy single molecule magnets decorated with azobenzene ligands
Abstract : We report on the synthesis, ab-initio calculations, magnetic and optical characterization of a Dy III-based dimeric compound named DyAZO. The dimers self-organize into a supramolecular chain decorated with photo-isomerizable azobenzene ligands. DyAZO displays a Single-Molecule Magnet (SMM) behavior. However, ab-initio calculations highlight a quite strong admixture of MJ states of the 6 H15/2 level of the Dy III ions, the presence of low-lying excited MJ states as well as an antiferromagnetic Dy-Dy dipolar coupling. This favors zero-field fast tunneling. Accordingly the Dy-doped analogue YDyAZO (5.5% Dy doping) displays an enhanced magnetic relaxation with an hysteresis that is observed at 0.5K. The influence on the magnetic properties of the decorating azobenzene ligand cis-to trans-isomerization has been tested both on solid samples and solutions of DyAZO and YDyAZO. This provides hints for the synthesis of future Dy-based photo-isomerizable molecules.
Cited literature [159 references]
https://hal-univ-rennes1.archives-ouvertes.fr/hal-02364866
Contributor : Laurent Jonchère <>
Submitted on : Monday, February 17, 2020 - 10:53:57 AM
Last modification on : Friday, July 10, 2020 - 4:03:16 PM
Long-term archiving on: : Monday, May 18, 2020 - 2:30:41 PM
Contributor : Laurent Jonchère <>
Submitted on : Monday, February 17, 2020 - 10:53:57 AM
Last modification on : Friday, July 10, 2020 - 4:03:16 PM
Long-term archiving on: : Monday, May 18, 2020 - 2:30:41 PM
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