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Reversible Pressure-Magnetic Modulation in a Tetrathiafulvalene-Based Dyad Piezochromic Dysprosium Single-Molecule Magnet**

Lookup NU author(s): Professor Mike ProbertORCiD

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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0).


Abstract

© 2023 The Authors. Chemistry - A European Journal published by Wiley-VCH GmbH.The extreme sensitivity of trivalent lanthanide ions to crystal field variations led to the emergence of single-molecule magnetic switching under various stimuli. The use of pressure as an external stimulus instead of classic light irradiation, oxidation or any chemical reactions allows a fine tuning of the magnetic modulation. Here the well-known pure isotopically enriched [162Dy(tta)3(L)]⋅C6H14 (162Dy) Single-Molecule Magnet (SMM) (tta−=2-2-thenoyltrifluoroacetonate and L=4,5-bis(propylthio)-tetrathiafulvalene-2-(2-pyridyl)benzimidazole-methyl-2-pyridine) was experimentally investigated by single-crystal diffraction and squid magnetometry under high applied pressures. Both reversible piezochromic properties and pressure modulation of the slow magnetic relaxation behavior were demonstrated and supported by ab initio calculations. The magnetic study of the diluted sample [162Dy0.05Y0.95(tta)3(L)]⋅C6H14 (162Dy@Y) indicated that variations in the electronic structure have mainly intermolecular origin with weak intramolecular contribution. Quantitative magnetic interpretation concludes to a deterioration of the Orbach process for the benefit of both Raman and QTM mechanisms under applied pressure.


Publication metadata

Author(s): Pointillart F, Flores Gonzalez J, Douib H, Montigaud V, McMonagle CJ, Le Guennic B, Cador O, Pinkowicz D, Probert MR

Publication type: Article

Publication status: Published

Journal: Chemistry - A European Journal

Year: 2023

Issue: ePub ahead of Print

Online publication date: 08/05/2023

Acceptance date: 18/04/2023

Date deposited: 13/06/2023

ISSN (print): 0947-6539

ISSN (electronic): 1521-3765

Publisher: John Wiley and Sons Inc

URL: https://doi.org/10.1002/chem.202300445

DOI: 10.1002/chem.202300445


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