Large Orbital Magnetic Moment Measured in the [TpFe(III)(CN)3](-) Precursor of Photomagnetic Molecular Prussian Blue Analogues

Autor: Pierre Dechambenoit, Christophe Cartier dit Moulin, Philippe Sainctavit, Oana Bunǎu, Rodolphe Clérac, Dmitri Mitcov, Vivien Schuler, Edwige Otero, Corine Mathonière, Amélie Juhin, Sadaf Fatima Jafri, Marie-Anne Arrio, Philippe Ohresser, Evangelia S. Koumousi
Přispěvatelé: Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC), Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de recherche pour le développement [IRD] : UR206-Centre National de la Recherche Scientifique (CNRS), Centre de recherches Paul Pascal (CRPP), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Institut Parisien de Chimie Moléculaire (IPCM), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Région Aquitaine, the Institut Universitaire de France (IUF), GDR MCM2, ANR-10-BLAN-0712,SWITCH,Commutateur Photo-Magnétique Unimoléculaire(2010), ANR-09-BLAN-0175,AC-MAGnets,Association Contrôlée de Molécules-Aimants pour une nouvelle Génération de Matériaux magnétiques(2009), ANR-12-PDOC-0038,PhotoSCM,Synthèse et étude de chaines aimant photocommutables(2012), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de recherche pour le développement [IRD] : UR206-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université de Bordeaux (UB), Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2016
Předmět:
Zdroj: Inorganic Chemistry
Inorganic Chemistry, 2016, 55 (14), pp.6980-6987. ⟨10.1021/acs.inorgchem.6b00664⟩
Inorganic Chemistry, American Chemical Society, 2016, 55 (14), pp.6980-6987. ⟨10.1021/acs.inorgchem.6b00664⟩
ISSN: 0020-1669
1520-510X
DOI: 10.1021/acs.inorgchem.6b00664⟩
Popis: International audience; 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.
Databáze: OpenAIRE
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