PEDERSEN, Kasper S.; WOODRUFF, Daniel N.; SINGH, Saurabh Kumar; TRESSAUD, Alain; DURAND, Etienne; ATANASOV, Mihail; PERLEPE, Panagiota; OLLEFS, Katharina; WILHELM, Fabrice; MATHONIÈRE, Corine; NEESE, Frank; ROGALEV, Andrei; BENDIX, Jesper; CLÉRAC, Rodolphe

doi:10.1002/chem.201702894

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PEDERSEN, Kasper S.
Centre de Recherche Paul Pascal [CRPP]
DTU Chemical Engineering
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

WOODRUFF, Daniel N.
Department of Chemistry [Oxford]

SINGH, Saurabh Kumar
Max-Planck-Institut für Chemische Energiekonversion [MPI-CEC]

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Chemistry - A European Journal. 2017, vol. 23, p. pp. 11244-11248

Wiley-VCH Verlag

Résumé en anglais

Heavy 5d elements, like osmium, feature strong spin-orbit interactions which are at the origin of exotic physical behaviors. Revealing the full potential of, for example, novel osmium oxide materials (“osmates”) is however contingent upon a detailed understanding of the local single-ion properties. Herein, two molecular osmate analogues, [OsF6]2@ and [OsF6]@, are reported as model systems for Os4+ and Os5+ centers found in oxides. Using X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD) techniques, combined with state-of-the-art ab initio calculations, their ground state was elucidated; mirroring the osmium electronic structure in osmates. The realization of such molecular model systems provides a unique chemical playground to engineer materials exhibiting spin-orbit entangled phenomena.< Réduire

Mots clés en anglais

5d elements

ab initio calculations

magnetism

osmium

spin-orbit interaction

X-ray spectroscopy

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[OsF6]x-: Molecular Models for Spin-Orbit Entangled Phenomena

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