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Thermal Spin Crossover and LIESST Effect Observed in Complexes [Fe(L(Ch))2(NCX)2] [L(Ch) = 2,5-Di(2-Pyridyl)-1,3,4-Chalcadiazole; Ch = O, S, Se; X = S, Se, BH3].

hal.structure.identifierInstitut für Anorganische und Analytische Chemie
dc.contributor.authorKLINGELE, Julia
hal.structure.identifierInstitut für Anorganische und Analytische Chemie
dc.contributor.authorKAASE, Dominic
hal.structure.identifierInstitut für Anorganische und Analytische Chemie
dc.contributor.authorSCHMUCKER, Maximilian
hal.structure.identifierInstitut für Anorganische Chemie
dc.contributor.authorLAN, Yanhua
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.authorLÉTARD, Jean-François
dc.date.issued2013
dc.identifier.issn0020-1669
dc.description.abstractEnTwo new complexes belonging to the family [Fe(II)(L)2(NCX)2] have been synthesized and structurally characterized. Complexation of the ligand L(O) = 2,5-di(2-pyridyl)-1,3,4-oxadiazole results in the formation of two derivatives of [Fe(II)(L(O))2(NCS)2] (1) with the common s-trans and the rarely observed s-cis conformation. No thermal spin crossover (SCO) was observed for the amorphous bulk material of the mixture. Using the new ligand L(Se) = 2,5-di(2-pyridyl)-1,3,4-selenadiazole, compound [Fe(II)(L(Se))2(NCS)2]*1.4DCM*0.6MeOH (2*1.4DCM*0.6MeOH) was structurally characterized by single crystal X-ray diffraction. Bulk material of [Fe(II)(L(Se))2(NCS)2]*MeOH (2*MeOH) exhibits a thermally induced SCO with small hysteresis [T1/2(↓) = 91 K, T1/2(↑) = 96 K]. LIESST and reflectivity studies have been performed on the SCO complexes [Fe(II)(L(S))2(NCS)2], [Fe(II)(L(S))2(NCSe)2], [Fe(II)(L(S))2(NCBH3)2]*H2O [L(S) = 2,5-di(2-pyridyl)-1,3,4-thiadiazole], and 2*MeOH. All complexes belong to the T0 = 90 K line [T(LIESST) = T0 - 0.3T1/2]. [Fe(II)(L(S))2(NCS)2], that exhibits a two-stepped thermal SCO process, has been found to also exhibit two well-separated T(LIESST) temperatures [T(LIESST, 1) = 44 K; T(LIESST, 2) = 53 K].
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.subjectSpin crossover
dc.subjectLIESST
dc.subjectMolecular complexes
dc.title.enThermal Spin Crossover and LIESST Effect Observed in Complexes [Fe(L(Ch))2(NCX)2] [L(Ch) = 2,5-Di(2-Pyridyl)-1,3,4-Chalcadiazole; Ch = O, S, Se; X = S, Se, BH3].
dc.typeArticle de revue
dc.identifier.doi10.1021/ic400342m
dc.subject.halChimie/Matériaux
bordeaux.journalInorganic Chemistry
bordeaux.page6000-6010
bordeaux.volume52
bordeaux.issue10
bordeaux.peerReviewedoui
hal.identifierhal-00826380
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00826380v1
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