Solvato Modulation of the Magnetic Memory in Isotopically Enriched Erbium Polyoxometallate - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Chemistry - A European Journal Année : 2021

Solvato Modulation of the Magnetic Memory in Isotopically Enriched Erbium Polyoxometallate

Résumé

Single-Molecule Magnet (SMM) property is by essence molecular, while commonly measured in solid crystalline state. Solvent crystallization molecules are usually neglected in the analysis and interpretation of solid-state properties. The solvation/desolvation process in the polyoxometalate(POM)-based Na [Er(W O ) ] ⋅ 35 H O SMM demonstrates that the dehydrated form relaxes more than 1000 times faster than the initial state, while the rehydration process allows the quasi complete recovering of the initial magnetic behaviour. This dehydration process is monitored by thermogravimetric analysis (TGA) and temperature-dependent X-ray powder diffraction, and rationalized by periodic quantum chemical calculations evidencing the tremendous role of the labile water molecules in the stability of the edifice. Ab-initio calculations highlight that sodium ions localization in the structure drive the magnetic responses. Isotopic enrichment with nuclear spin free ( Er, I=0) Er ions shows that the relaxation dynamics in the quantum regime depends on the nuclear spin.

Domaines

Chimie
Fichier principal
Vignette du fichier
Cador et al-2021-Solvato Modulation of the Magnetic Memory in Isotopically Enriched Erbium.pdf (1.94 Mo) Télécharger le fichier
Cador_chem202100953-sup-0001-misc_information.pdf (2.02 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03247461 , version 1 (15-06-2021)

Identifiants

Citer

Olivier Cador, Jessica Flores Gonzalez, Vincent Montigaud, Vincent Dorcet, Kevin Bernot, et al.. Solvato Modulation of the Magnetic Memory in Isotopically Enriched Erbium Polyoxometallate. Chemistry - A European Journal, 2021, 27 (39), pp.10160-10168. ⟨10.1002/chem.202100953⟩. ⟨hal-03247461⟩
74 Consultations
57 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More