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Temperature- and pressure-induced switching of the molecular spin state of an orthorhombic iron(II) spin-crossover salt

hal.structure.identifierInstitut de Chimie Moléculaire et des Matériaux d'Orsay [ICMMO]
dc.contributor.authorTISSOT, Antoine
hal.structure.identifierDepartment of Chemistry
hal.structure.identifierLaboratoire de chimie de coordination [LCC]
dc.contributor.authorSHEPHERD, Helena
hal.structure.identifierInstitut de Physique de Rennes [IPR]
dc.contributor.authorTOUPET, Loic
hal.structure.identifierInstitut de Physique de Rennes [IPR]
dc.contributor.authorCOLLET, Eric
hal.structure.identifierInstitut de Chimie Moléculaire et des Matériaux d'Orsay [ICMMO]
dc.contributor.authorSAINTON, Joëlle
hal.structure.identifierLaboratoire de chimie de coordination [LCC]
dc.contributor.authorMOLNÁR, Gábor
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGUIONNEAU, Philippe
hal.structure.identifierInstitut de Chimie Moléculaire et des Matériaux d'Orsay [ICMMO]
dc.contributor.authorBOILLOT, Marie-Laure
dc.date.issued2013
dc.identifier.issn1434-1948
dc.description.abstractEnThe [(TPA)FeIII(TCC)]+ complex [TPA = tris(2-pyridylmethyl)amine, TCC2- = 3,4,5,6-tetrachlorocatecholate dianion] forms a molecular solid with the SbF6- anion, which exhibits an incomplete S = 1/2 ↔ S = 5/2 thermal spin-crossover process centered at 250 K. Single-crystal X-ray diffraction, Raman spectroscopy, and magnetic measurements of this orthorhombic polymorph were performed to delineate the spin-state thermo- and piezoswitching in relation to the structural and elastic properties. Indeed, a pressure-induced spin crossover (centered at P1/2 ≈ 1.65 kbar, T = 294 K) concomitant with unit-cell contraction was observed by applying a hydrostatic pressure to the single crystal. Under ambient conditions, the piezo-induced transition, like that induced thermally, is relatively gradual, which probably reflects a similar mechanism in response to both stimuli. Except for a 47 K shift, the spin-crossover curves of the isostructural SbF6- and PF6- salts compare well. They are discussed with respect to structural anisotropy and pressure effects.
dc.language.isoen
dc.publisherWiley-VCH Verlag
dc.subject.enIron
dc.subject.enSpin crossover
dc.subject.enRaman spectroscopy
dc.subject.enX-ray diffraction
dc.title.enTemperature- and pressure-induced switching of the molecular spin state of an orthorhombic iron(II) spin-crossover salt
dc.typeArticle de revue
dc.identifier.doi10.1002/ejic.201201059
dc.subject.halChimie/Matériaux
bordeaux.journalEuropean Journal of Inorganic Chemistry
bordeaux.page1001-1008
bordeaux.volume2013
bordeaux.issue5-6
bordeaux.peerReviewedoui
hal.identifierhal-00795611
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00795611v1
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