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Spin-state ordering on one sub-lattice of a mononuclear iron(III) spin crossover complex exhibiting LIESST and TIESST

hal.structure.identifierSchool of Chemistry and Chemical Biology
dc.contributor.authorMURNAGHAN, Kevin D.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCARBONERA, Chiara
hal.structure.identifierInstitut de Physique de Rennes [IPR]
dc.contributor.authorTOUPET, Loïc
hal.structure.identifierSchool of Chemistry and Chemical Biology
dc.contributor.authorGRIFFIN, Michael
hal.structure.identifierInstitute of Condensed Matter and Nanosciences [MOST-Chemistry]
dc.contributor.authorDÎRTU, Marinela M.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDESPLANCHES, Cédric
hal.structure.identifierInstitute of Condensed Matter and Nanosciences [MOST-Chemistry]
dc.contributor.authorGARCIA, Yann
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.authorLÉTARD, Jean-François
hal.structure.identifierSchool of Chemistry and Chemical Biology
dc.contributor.authorMORGAN, Grace G.
dc.date.issued2014
dc.identifier.issn0947-6539
dc.description.abstractEnThe two-step spin crossover in mononuclear iron(III) complex [Fe(salpm)2 ]ClO4 ⋅0.5 EtOH (1) is shown to be accompanied by a structural phase transition as concluded from (57) Fe Mössbauer spectroscopy and single crystal X-ray diffraction, with spin-state ordering on just one of two sub-lattices in the intermediate magnetic and structural phase. The complex also exhibits thermal- and light-induced spin-state trapping (TIESST and LIESST), and relaxation from the LIESST and TIESST excited states occurs via the broken symmetry intermediate phase. Two relaxation events are evident in both experiments, that is, two T(LIESST) and two T(TIESST) values are recorded. The change in symmetry which accompanies the TIESST effect was followed in real time using single crystal diffraction. After flash freezing at 15 K the crystal was warmed to 40 K at which temperature superstructure reflections were observed to appear and disappear within a 10 000 s time range. In the frame of the international year of crystallography, these results illustrate how X-ray diffraction makes it possible to understand complex ordering phenomena.
dc.language.isoen
dc.publisherWiley-VCH Verlag
dc.subject.enBroken symmetry
dc.subject.enIron
dc.subject.enLIESST
dc.subject.enMagnetic properties
dc.subject.enTIESST
dc.title.enSpin-state ordering on one sub-lattice of a mononuclear iron(III) spin crossover complex exhibiting LIESST and TIESST
dc.typeArticle de revue
dc.identifier.doi10.1002/chem.201400286
dc.subject.halChimie/Matériaux
bordeaux.journalChemistry - A European Journal
bordeaux.page5613-5618
bordeaux.volume20
bordeaux.issue19
bordeaux.peerReviewedoui
hal.identifierhal-00989029
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00989029v1
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