JAFRI, Sadaf Fatima; KOUMOUSI, Evangelia S; SAINCTAVIT, Philippe; JUHIN, Amélie; SCHULER, Vivien; BUNAU, Oana; MITCOV, Dmitri; DECHAMBENOIT, Pierre; MATHONIÈRE, Corine; CLÉRAC, Rodolphe; OTERO, Edwige; OHRESSER, Philippe; CARTIER DIT MOULIN, Christophe; ARRIO, Marie-Anne

doi:10.1021/acs.inorgchem.6b00664

Métadonnées

Licence d’utilisation du document

JAFRI, Sadaf Fatima
Institut de minéralogie, de physique des matériaux et de cosmochimie [IMPMC]

KOUMOUSI, Evangelia S
Centre de recherches Paul Pascal [CRPP]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

SAINCTAVIT, Philippe
Institut de minéralogie, de physique des matériaux et de cosmochimie [IMPMC]
Synchrotron SOLEIL [SSOLEIL]

Langue

Article de revue

Ce document a été publié dans

Inorganic Chemistry. 2016-07-18, vol. 55, n° 14, p. 6980-6987

American Chemical Society

Résumé en anglais

Photomagnetism in three-dimensional Co/Fe Prussian blue analogues is a complex phenomenon, whose detailed mechanism is not yet fully understood. Recently, researchers have been able to prepare molecular fragments of these networks using a building block synthetic approach from mononuclear precursors. The main objective in this strategy is to isolate the smallest units that show an intramolecular electron transfer to have a better understanding of the electronic processes. A prior requirement to the development of this kind of system is to understand to what extent electronic and magnetic properties are inherited from the corresponding precursors. In this work, we investigate the electronic and magnetic properties of the FeTp precursor (N(C4H9)4)[TpFe(III)(CN)3], (Tp being tris-pyrazolyl borate) of a recently reported binuclear cyanido-bridged Fe/Co complex. X-ray absorption spectroscopy and X-ray magnetic circular dichroism measurements at the Fe L2,3 edges (2p → 3d) supported by ligand field multiplet calculations have allowed to determine the spin and orbit magnetic moments. Inaccuracy of the spin sum rule in the case of low-spin Fe(III) ion was demonstrated. An exceptionally large value of the orbital magnetic moment is found (0.9 μB at T = 2 K and B = 6.5 T) that is likely to play an important role in the magnetic and photomagnetic properties of molecular Fe/Co Prussian blue analogues.< Réduire

DOI

http://dx.doi.org/10.1021/acs.inorgchem.6b00664

Project ANR

Commutateur Photo-Magnétique Unimoléculaire - ANR-10-BLAN-0712
Association Contrôlée de Molécules-Aimants pour une nouvelle Génération de Matériaux magnétiques
Synthèse et étude de chaines aimant photocommutables - ANR-12-PDOC-0038

Origine

Importé de hal

Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026