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Solvatomorphism‐induced 45 K hysteresis width in a spin‐crossover mononuclear compound

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
hal.structure.identifierLaboratoire de traitement des eaux et valorisation des déchets industriels [LTEVDI]
dc.contributor.authorDJEMEL, Abdelhak
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorSTEFÁNCZYK, Olaf
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMARCHIVIE, Mathieu
hal.structure.identifierInstitut de Physique de Rennes [IPR]
dc.contributor.authorTRZOP, Elzbieta
hal.structure.identifierInstitut de Physique de Rennes [IPR]
dc.contributor.authorCOLLET, Eric
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDESPLANCHES, Cédric
hal.structure.identifierLaboratoire de traitement des eaux et valorisation des déchets industriels [LTEVDI]
dc.contributor.authorDELIMI, Rachid
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCHASTANET, Guillaume
dc.date.issued2018-10-01
dc.identifier.issn0947-6539
dc.description.abstractEnSpin‐transition compounds are coordination complexes that can present two stable or metastable high‐spin and low‐spin states at a given temperature (thermal hysteresis). The width of the thermal hysteresis (difference between the maximum and minimum temperature between which the compound exhibits bi‐stability) depends on the interactions between the coordination complexes within the compound, and which may be modulated by the absence or presence of solvent within the structure. The new compound [Fe(3‐bpp)2][Au(CN)2]2 (1, 3‐bpp=2,6‐di‐(1H‐pyrazol‐3‐yl)pyridine) was synthesized and its properties were compared with those of the solvated compound [Fe(3‐bpp)2][Au(CN)2]2⋅2 H2O (1.H2O) already described. 1 has a two‐steps thermal hysteresis of 45 K, in contrast to the compound 1.H2O which exhibits a gradual conversion without hysteresis. This hysteretic transition is accompanied by a reversible reconstructive structural transition and twinning. This stepped behaviour is also observed in the photomagnetic properties despite the low efficiency of photoswitching. Single‐crystal photocrystallographic investigations confirm this low conversion, which we attributed to the high energy cost to form the high‐spin structure, whose symmetry differs from that of the low‐spin phase.
dc.description.sponsorshipEtude femtoseconde rayons X et optique de la dynamique ultrarapide de photocommutation de matériaux moléculaires magnétiques
dc.description.sponsorshipBistabilité magnétique dans de nouveaux systèmes moléculaires à base de ligands anioniques pontants
dc.language.isoen
dc.publisherWiley-VCH Verlag
dc.subject.enspin crossover
dc.subject.ensolvatomorphism
dc.subject.enphase transition
dc.subject.enhysteresis
dc.subject.enaurophilic interactions
dc.subject.encoordination chemistry
dc.title.enSolvatomorphism‐induced 45 K hysteresis width in a spin‐crossover mononuclear compound
dc.typeArticle de revue
dc.identifier.doi10.1002/chem.201802572
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
dc.subject.halChimie/Matériaux
bordeaux.journalChemistry - A European Journal
bordeaux.page14760-14767
bordeaux.volume24
bordeaux.issue55
bordeaux.peerReviewedoui
hal.identifierhal-01889070
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01889070v1
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