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Using polymorphism to master the spin crossover mechanism in [Fe(PM-PeA)2(NCSe)2]

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorTAILLEUR, Élodie
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMARCHIVIE, Mathieu
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorNÉGRIER, Philippe
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDENUX, Dominique
hal.structure.identifierInstitut Européen de Chimie et Biologie [IECB]
dc.contributor.authorMASSIP, Stéphane
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorMONDIEIG, Denise
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCHASTANET, Guillaume
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGUIONNEAU, Philippe
dc.date.issued2019
dc.description.abstractEnIn the crystalline state, a given molecule can have very different physical properties depending on the molecular packing within the sample. Despite this, the spin crossover is by essence a molecular scale phenomenon, and polymorphism leads to large diversity in the spin-switch features. The comparison of the structural and physical properties of the spin crossover polymorphs can therefore give crucial information about the phenomenon itself. As revealed in this study, the investigated molecular iron(II) complex has two polymorphic forms, one showing a first order spin crossover with a large hysteresis centered at room temperature and the other one showing a fully reversible gradual spin crossover at a lower temperature. The distinction between the two polymorphs is subtle and lies in the molecular stacking with regard to the interatomic contacts of the H⋯H, which underlines the extreme sensitivity of this physical phenomenon in the crystalline stacking. Interestingly, provided that the rational design of the polymorphs can be controlled, the crystallization of these polymorphs could open up perspectives as it allows dissimilar spin crossover mechanisms to be chosen when starting from the same molecule.
dc.description.sponsorshipEtude femtoseconde rayons X et optique de la dynamique ultrarapide de photocommutation de matériaux moléculaires magnétiques - ANR-13-BS04-0002
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.title.enUsing polymorphism to master the spin crossover mechanism in [Fe(PM-PeA)2(NCSe)2]
dc.typeArticle de revue
dc.identifier.doi10.1039/C9CE01137D
dc.subject.halChimie/Matériaux
dc.subject.halChimie/Chimie de coordination
bordeaux.journalCrystEngComm
bordeaux.page6246-6251
bordeaux.volume21
bordeaux.issue41
bordeaux.peerReviewedoui
hal.identifierhal-02318101
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02318101v1
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