Photophysical Properties and Single-Molecule Magnet Behavior in Heterobimetallic 3d4 f Schiff Base Complexes - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue European Journal of Inorganic Chemistry Année : 2022

Photophysical Properties and Single-Molecule Magnet Behavior in Heterobimetallic 3d4 f Schiff Base Complexes

Résumé

Three new heterobimetallic Schiff base complexes of formula [(LZnCl)2Gd(H2O)](ZnCl4)0.5 (2), [(LZn(OH))(LZnCl)Sm(H2O)](ZnCl4)0.5 (3) and [(LZnCl0.5(OH)0.5)(LZnCl)Dy(H2O)](ZnCl4)0.5 (4) were designed from the reaction of the metallo-ligand ZnL (1) (H2L=N, N′-bis(3-methoxysalicylaldiimine)-1,3-propylene-2-ol) and lanthanide salt in a ratio 1 to 1. The crystallographic structures of 2–4 were resolved by single crystal X-ray diffraction. Light irradiation allowed the observation of a broad emission centered on the organic ligand which is exalted upon Zn(II) coordination. 1 is able to act as a metallo-organic chromophore for the sensitization of the Sm(III) luminescence. Finally the Dy(III) derivative displayed Single-Molecule Magnet (SMM) behavior with an opening of the hysteresis loop up to 5 K and a magnetic relaxation operating through Orbach, Raman and Quantum Tunneling of the Magnetization (QTM) at 0 Oe while under an applied magnetic field the QTM is efficiently cancelled. © 2022 Wiley-VCH GmbH.
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Dates et versions

hal-03830135 , version 1 (14-12-2022)

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F.Z. Chiboub Fellah, F. Pointillart, Thierry Guizouarn, T. Roisnel, N. Dege, et al.. Photophysical Properties and Single-Molecule Magnet Behavior in Heterobimetallic 3d4 f Schiff Base Complexes. European Journal of Inorganic Chemistry, 2022, 2022 (27), pp.e202200349. ⟨10.1002/ejic.202200349⟩. ⟨hal-03830135⟩
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