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Elastic frustration triggering photoinduced hidden hysteresis and multistability in a two-dimensional photoswitchable Hofmann-like spin-Crossover metal–organic framework

hal.structure.identifierChimie, Electrochimie Moléculaires et Chimie Analytique [CEMCA]
dc.contributor.authorMILIN, Eric
hal.structure.identifierChimie, Electrochimie Moléculaires et Chimie Analytique [CEMCA]
dc.contributor.authorPATINEC, Véronique
hal.structure.identifierChimie, Electrochimie Moléculaires et Chimie Analytique [CEMCA]
dc.contributor.authorTRIKI, Smail
hal.structure.identifierCristallographie, Résonance Magnétique et Modélisations [CRM2]
dc.contributor.authorBENDEIF, El-Eulmi
hal.structure.identifierCristallographie, Résonance Magnétique et Modélisations [CRM2]
dc.contributor.authorPILLET, Sébastien
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMARCHIVIE, Mathieu
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCHASTANET, Guillaume
hal.structure.identifierGroupe d'Etude de la Matière Condensée [GEMAC]
dc.contributor.authorBOUKHEDDADEN, Kamel
dc.date.issued2016-11-21
dc.identifier.issn0020-1669
dc.description.abstractEnWe report a two-dimensional Hofmann-like spin-crossover (SCO) material, [Fe(trz-py)2{Pt(CN)4}]·3H2O, built from [FePt(CN)4] layers separated by interdigitated 4-(2-pyridyl)-1,2,4,4H-triazole (trz-py) ligands with two symmetrically inequivalent FeII sites. This compound exhibits an incomplete first-order spin transition at 153 K between fully high-spin (HS-HS) and intermediate high-spin low-spin (HS-LS) ordered states. At low temperature, it undergoes a bidirectional photoswitching to HS-HS and fully low-spin (LS-LS) states with green and near-IR light irradiation, respectively, with associated T(LIESST = Light-Induced Excited Spin-State Trapping) and T(reverse-LIESST) values of 52 and 85 K, respectively. Photomagnetic investigations show that the reverse-LIESST process, performed from either HS-HS or HS-LS states, enables access to a hidden stable LS-LS state, revealing the existence of a hidden thermal hysteresis. Crystallographic investigations allowed to identify that the strong metastability of the HS-LS state originates from the existence of a strong elastic frustration causing antiferroelastic interactions within the [FePt(CN)4] layers, through the rigid NC-Pt-CN bridges connecting the inequivalent FeII sites. The existence of the stable LS-LS state paves the way for a multidirectional photoswitching and allows potential applications for electronic devices based on ternary digits.
dc.description.sponsorshipBistabilité magnétique dans de nouveaux systèmes moléculaires à base de ligands anioniques pontants
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.title.enElastic frustration triggering photoinduced hidden hysteresis and multistability in a two-dimensional photoswitchable Hofmann-like spin-Crossover metal–organic framework
dc.typeArticle de revue
dc.identifier.doi10.1021/acs.inorgchem.6b01081
dc.subject.halChimie/Matériaux
bordeaux.journalInorganic Chemistry
bordeaux.page11652-11661
bordeaux.volume55
bordeaux.issue22
bordeaux.peerReviewedoui
hal.identifierhal-01407977
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01407977v1
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