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Article Dans Une Revue Inorganic Chemistry Frontiers Année : 2021

Solid-state: Versus solution investigation of a luminescent chiral BINOL-derived bisphosphate single-molecule magnet

François Riobé
G. Argouarch
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Olivier Maury
Claudia Lalli

Résumé

The enantiopure coordination polymer [Dy(hfac)3((S/R)-L)]n ([(S/R)-1]n) involving a BINOL-derived bisphosphate ligand (S/R)-L is reported. Paramagnetic NMR and computational investigations demonstrated the formation of mononuclear species [(S/R)-1] in CH2Cl2 solution and its optimized structure was determined. The experimental electronic circular dichroism signals of (S/R)-L were strongly enhanced after metal coordination [(S/R)-1]. Both polymeric and mononuclear structures displayed field-induced Single-Molecule Magnet (SMM) behaviour with similar multi-relaxation processes due to the retention of crystal-field splitting determined by CASSCF calculations, despite the strong structural transformation between the two media. The HOMO ? LUMO transition of the (S)-L ligand induced the classical Dy(iii) emission at 77 K that was correlated with the magnetic properties. [(S)-1]n is described as one-dimensional assembly of chiral luminescent Single-Ion Magnets (SIMs).
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Dates et versions

hal-03164556 , version 1 (30-03-2021)

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C.A. Mattei, V. Montigaud, Frédéric Gendron, S. Denis-Quanquin, V. Dorcet, et al.. Solid-state: Versus solution investigation of a luminescent chiral BINOL-derived bisphosphate single-molecule magnet. Inorganic Chemistry Frontiers, 2021, 8 (4), pp.947-962. ⟨10.1039/d0qi01192d⟩. ⟨hal-03164556⟩
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