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Article Dans Une Revue Chemistry Squared Année : 2022

Luminescent and Sublimable Binaphthyl-Based Field-Induced Lanthanide Single-Molecule Magnets

Marie Cordier
Claudia Lalli
Olivier Cador
Olivier Maury

Résumé

The association of the [Ln(hfac)3(H2O)2] metallic building blocks with the new ligand [1,1’-binaphthalene]-8,8’-diylbis(diphenylphosphine oxide) (L) led to the formation of three mononuclear complexes of formula [Ln(hfac)3(L)] (LnIII = Eu (1), Dy (2) and Yb (3)). The mononuclear character of the compounds is due to the bidentate coordination mode adopted by L to link the metal. L allows the observation of the characteristic visible 5D0 -> 7FJ (J = 0-4) EuIII- and near infrared 2F5/2 -> 2F7/2 YbIII- emissions while 2 is only weakly emissive due to the mismatch between the energy positions of the triplet excited state of the ligand and DyIII emissive state. The magnetic data reveal a field-induced Single-Molecule Magnet (SMM) behavior for 2 and 3 with an efficient suppression of the Quantum Tunneling of the Magnetization (QTM). The slow magnetic relaxation occurs through a Raman process while the Orbach contribution is discarded as confirmed by the correlation with the MJ states energy splitting provided by the luminescence spectrum of 3.

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hal-03798035 , version 1 (05-10-2022)

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Paternité - Pas d'utilisation commerciale

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Carlo Andrea Mattei, Thomas Delouche, Bertrand Lefeuvre, Marie Cordier, Claudia Lalli, et al.. Luminescent and Sublimable Binaphthyl-Based Field-Induced Lanthanide Single-Molecule Magnets. Chemistry Squared, 2022, 6, pp.1. ⟨10.28954/2022.csq.06.001⟩. ⟨hal-03798035⟩
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