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An investigation of photo- and pressure-induced effects in a pair of isostructural two-dimensional spin-crossover framework materials

hal.structure.identifierSchool of Chemistry
dc.contributor.authorSCIORTINO, Natasha F.
hal.structure.identifierSchool of Chemistry
dc.contributor.authorNEVILLE, Suzanne M.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDESPLANCHES, Cédric
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorLÉTARD, Jean-François
hal.structure.identifierInstituto de Ciencia Molecular [ICMol]
dc.contributor.authorMARTINEZ, Victor
hal.structure.identifierInstituto de Ciencia Molecular [ICMol]
dc.contributor.authorREAL, José Antonio
hal.structure.identifierSchool of Chemistry
dc.contributor.authorMOUBARAKI, Boujemaa
hal.structure.identifierSchool of Chemistry
dc.contributor.authorMURRAY, Keith S.
hal.structure.identifierSchool of Chemistry
dc.contributor.authorKEPERT, Cameron J.
dc.date.issued2014
dc.identifier.issn0947-6539
dc.description.abstractEnTwo new isostructural iron(II) spin-crossover (SCO) framework (SCOF) materials of the type [Fe(dpms)2 (NCX)2 ] (dpms=4,4'-dipyridylmethyl sulfide; X=S (SCOF-6(S)), X=Se (SCOF-6(Se))) have been synthesized. The 2D framework materials consist of undulating and interpenetrated rhomboid (4,4) nets. SCOF-6(S) displays an incomplete SCO transition with only approximately 30 % conversion of high-spin (HS) to low-spin iron(II) sites over the temperature range 300-4 K (T1/2 =75 K). In contrast, the NCSe(-) analogue, SCOF-6(Se), displays a complete SCO transition (T1/2 =135 K). Photomagnetic characterizations reveal quantitative light- induced excited spin-state trapping (LIESST) of metastable HS iron(II) sites at 10 K. The temperature at which the photoinduced stored information is erased is 58 and 50 K for SCOF-6(S) and SCOF-6(Se), respectively. Variable-pressure magnetic measurements were performed on SCOF-6(S), revealing that with increasing pressure both the T1/2 value and the extent of spin conversion are increased; with pressures exceeding 5.2 kbar a complete thermal transition is achieved. This study confirms that kinetic trapping effects are responsible for hindering a complete thermally induced spin transition in SCOF-6(S) at ambient pressure due to an interplay between close T1/2 and T(LIESST) values.
dc.language.isoen
dc.publisherWiley-VCH Verlag
dc.subject.enChalcogens
dc.subject.enCoordination polymers
dc.subject.enIron
dc.subject.enMagnetic properties
dc.subject.enSpin crossover
dc.title.enAn investigation of photo- and pressure-induced effects in a pair of isostructural two-dimensional spin-crossover framework materials
dc.typeArticle de revue
dc.identifier.doi10.1002/chem.201400367
dc.subject.halChimie/Matériaux
bordeaux.journalChemistry - A European Journal
bordeaux.page7448-7457
bordeaux.volume20
bordeaux.issue24
bordeaux.peerReviewedoui
hal.identifierhal-01003836
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01003836v1
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