Magnetocaloric effect in a high-spin ferromagnetic molecular cluster

Agapaki, Eleftheria ; Charkiolakis, Emmanouil K. ; Nichol, Gary S. ; Gracia, David ; Evangelisti, Marco ; Brechin, Euan K.

Resumen: The reaction of MnCl2·4H2O with HL ((1-methyl-1H-imidazol-2-yl)methanol) and pdH2 (1, 3 propanediol) in a basic MeCN solution results in the formation of a mixed-valence [Mn20] cationic cluster and two [MnIICl4] counter anions. The metallic skeleton of the cluster describes two geometrically equivalent mixed-valent, linked [MnIII6MnII4] supertetrahedra in which nearest-neighbor metal ions have a different oxidation state. Magnetic susceptibility, magnetization data and heat capacity measurements support evidence of predominant ferromagnetic correlations, leading to a s = 22 spin ground state for the [MnIII6MnII4] supertetrahedra, which are pair-linked by a weak antiferromagnetic coupling. The properties are discussed in the context of the magnetocaloric effect and the potential application of this compound in cryogenic refrigeration.

Idioma: Inglés

DOI: 10.3389/fchem.2024.1494609

Año: 2024

Publicado en: Frontiers in Chemistry 12 (2024), 1494609 [8 pp.]
ISSN: 2296-2646

Factor impacto JCR: 4.2 (2024)

Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 84 / 239 = 0.351 (2024) - Q2 - T2

Factor impacto CITESCORE: 8.4 - Chemistry (all) (Q1)

Factor impacto SCIMAGO: 0.83 - Chemistry (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E11-23R
Financiación: info:eu-repo/grantAgreement/ES/DGA-FSE/E12-23R-RASMIA
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2021-124734OB-C21

Tipo y forma: Article (Published version)