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Polymeric Fe(II) spin cross over compounds : XAS structural results

hal.structure.identifierLaboratoire de Physique des Milieux Denses [LPMD]
hal.structure.identifierLaboratoire pour l'utilisation du rayonnement électromagnétique [LURE]
dc.contributor.authorMICHALOWICZ, Alain
hal.structure.identifierLaboratoire de Physique des Milieux Denses [LPMD]
dc.contributor.authorMOSCOVICI, Jacques
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorKAHN, Olivier
dc.date.issued1997-04
dc.identifier.issn1155-4339
dc.description.abstractEnFe(II) triazole derivatives are spin cross-over compounds with various Tc (-30->+150 °C), large thermal hysteresis (dTc à peu près égal à 50 K) and an important thermochromic effect. These promising properties, which are already used in experimental imaging and memory devices, are probably due to their polymeric structures. We have studied these structures by EXAFS and X-Ray diffraction (in spite of the important long distance disorder observed). The key result of this study is the alignment of a long chain of Fe(II) ions in the Low Spin (LS) state of the polymeric species, proved by the presence of a characteristic double Fe-Fe distance multiple scattering EXAFS signal (analysed by FEFF code). New results have been obtained recently on new members of the Fe(II) triazole familly and nickel glyoxime model compounds presenting similar dependence of the multiple-scattering signal amplitude were performed in order to explain the apparent vanishing of the alignment in the High Spin (HS) state.
dc.language.isoen
dc.publisherEDP Sciences
dc.subject.enPolymer
dc.subject.enFe(II)
dc.subject.enSpin crossover
dc.subject.enXAS
dc.title.enPolymeric Fe(II) spin cross over compounds : XAS structural results
dc.typeArticle de revue
dc.identifier.doi10.1051/jp4/1997124
dc.subject.halChimie/Matériaux
bordeaux.journalJournal de Physique IV Proceedings
bordeaux.page633-635
bordeaux.volume7
bordeaux.issueC2
bordeaux.peerReviewedoui
hal.identifierhal-00336362
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00336362v1
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