Solid-state: Versus solution investigation of a luminescent chiral BINOL-derived bisphosphate single-molecule magnet
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).
Mots clés
Dichloromethane
Dichroism
Dysprosium compounds
Ligands
Luminescence
Magnets
Molecules
Nuclear magnetic resonance
One dimensional
Polymers
Computational investigation
Coordination Polymers
Crystal-field splitting
Electronic circular dichroism
Mononuclear structures
Optimized structures
Single-molecule magnet
Structural transformation
Stereochemistry
Fichier principal
Le Guennic_Pointillart_2021_Solid-state versus solution investigation of a luminescent chiral_Revised_DyL1solid_vs_solution_preproof.pdf (2.78 Mo)
Télécharger le fichier
| Origine | Fichiers produits par l'(les) auteur(s) |
|---|