Magnetization Slow Dynamics in Ferrocenium Complexes - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Chemistry - A European Journal Année : 2019

Magnetization Slow Dynamics in Ferrocenium Complexes

Résumé

The single-molecule magnet (SMM) properties of a series of ferrocenium complexes, [Fe(h5-C5R5)2]+ (R=Me, Bn), are reported. In the presence of an applied dc field, the slow dynamics of the magnetization in [Fe(h5-C5Me5)2]BArF are revealed. Multireference quantum mechanical calculations show a large energy difference between the ground and first excited states, excluding the commonly invoked, thermally activated (Orbach-like) mechanism of relaxation. In contrast, a detailed analysis of the relaxation time highlights that both direct and Raman processes are responsible for the SMM properties. Similarly, the bulky ferrocenium complexes, [Fe(h5-C5Bn5)2]BF4 and [Fe(h5-C5Bn5)2]PF6, also exhibit magnetization slow dynamics, however an additional relaxation process is clearly detected for these analogous systems.

Dates et versions

hal-02301818 , version 1 (30-09-2019)

Identifiants

Citer

Mei Ding, Anne Hickey, Maren Pink, Joshua Telser, David Tierney, et al.. Magnetization Slow Dynamics in Ferrocenium Complexes. Chemistry - A European Journal, 2019, 25 (45), pp.10625-10632. ⟨10.1002/chem.201900799⟩. ⟨hal-02301818⟩

Collections

CNRS CRPP INC-CNRS
64 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More