Article Dans Une Revue Journal of the American Chemical Society Année : 2024

Self-Assembled Tetranuclear Square Complex of Chromium(III) Bridged by Radical Pyrazine: A Molecular Model for Metal–Organic Magnets

Rosa Diego
Elizaveta A Suturina
Aaron Mailman

Résumé

The attractive electronic properties of metal-pyrazine materials electrical conductivity, magnetic order, and strong magnetic coupling can be tuned in a wide range depending on the metal employed, as well as its ligand-imposed redox environment. Using solvent-directed synthesis to control the dimensionality of such systems, a discrete tetranuclear chromium(III) complex, exhibiting a rare example of bridging radical pyrazine, has been prepared from chromium(II) triflate and neutral pyrazine. The strong antiferromagnetic interaction between CrIII (S = 3/2) and radical pyrazine (S = 1/2) spins, theoretically estimated at about −932 K, leads to a thermally isolated ST = 4 ground state, which remains the only populated state observable even at room temperature.

Fichier principal
Vignette du fichier
24, JACS, 46 HAL copie.pdf (2.95 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Licence

Dates et versions

hal-04675058 , version 1 (22-08-2024)

Licence

Identifiants

Citer

Dandan Lou, Nathan J Yutronkie, Itziar Oyarzabal, Long-Fei Wang, Abhijit Adak, et al.. Self-Assembled Tetranuclear Square Complex of Chromium(III) Bridged by Radical Pyrazine: A Molecular Model for Metal–Organic Magnets. Journal of the American Chemical Society, 2024, 146 (29), pp.19649 - 19653. ⟨10.1021/jacs.4c05756⟩. ⟨hal-04675058⟩
171 Consultations
321 Téléchargements

Altmetric

Partager

  • More