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Halogen substitution effects on N2O schiff base ligands in unprecedented abrupt Fe(II) spin crossover complexes

hal.structure.identifierSchool of Chemistry
dc.contributor.authorPHONSRI, Wasinee
hal.structure.identifierSchool of Chemistry
dc.contributor.authorMACEDO, David S.
hal.structure.identifierIITB-Monasch Research Academy
dc.contributor.authorVIGNESH, Kuduva R.
hal.structure.identifierDepartment of Chemistry [Mumbai]
dc.contributor.authorRAJARAMAN, Gopalan
hal.structure.identifierDepartment of Chemistry & MacDiarmid Institute for Advanced Materials and Nanotechnology
dc.contributor.authorDAVIES, Casey G.
hal.structure.identifierDepartment of Chemistry & MacDiarmid Institute for Advanced Materials and Nanotechnology
dc.contributor.authorJAMESON, Guy N. L.
hal.structure.identifierSchool of Chemistry
dc.contributor.authorMOUBARAKI, Boujemaa
hal.structure.identifierDepartment of Chemistry, MacDiarmid Institute for Advanced Materials and Nanotechnology
dc.contributor.authorWARD, Jas S.
hal.structure.identifierDepartment of Chemistry, MacDiarmid Institute for Advanced Materials and Nanotechnology
dc.contributor.authorKRUGER, Paul E.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCHASTANET, Guillaume
hal.structure.identifierSchool of Chemistry
dc.contributor.authorMURRAY, Keith S.
dc.date.issued2017-05-23
dc.identifier.issn0947-6539
dc.description.abstractEnA family of halogen-substituted Schiff base iron(II) complexes, [Fe(II) (qsal-X)2 ], (qsal-X=5-X-N-(8-quinolyl)salicylaldimines)) in which X=F (1), Cl (2), Br (3) or I (4) has been investigated in detail. Compound 1 shows a temperature invariant high spin state, whereas the others all show abrupt spin transitions, at or above room temperature, namely, 295 K (X=I) up to 342 K (X=Br), these being some of the highest T1/2 values obtained, to date, for Fe(II) N/O species. We have recently reported subtle symmetry breaking in [Fe(II) (qsal-Cl)2 ] 2 with two spin transition steps occurring at 308 and 316 K. A photomagnetic study reveals almost full HS conversion of [Fe(II) (qsal-I)2 ] 4 at low temperature (T(LIESST)=54 °K). The halogen substitution effects on the magnetic properties, as well as the crystal packing of the [Fe(II) (qsal-X)2 ] compounds and theoretical calculations, are discussed in depth, giving important knowledge for the design of new spin crossover materials. In comparison to the well known iron(III) analogues, [Fe(III) (qsal-X)2 ](+) , the two extra π-π and P4AE interactions found in [Fe(II) (qsal-X)2 ] compounds, are believed to be accountable for the spin transitions occurring at ambient temperatures.
dc.language.isoen
dc.publisherWiley-VCH Verlag
dc.subject.enSchiff base ligands
dc.subject.enhalogen bonding
dc.subject.enintermolecular interactions
dc.subject.eniron complexes
dc.subject.enspin crossover
dc.title.enHalogen substitution effects on N2O schiff base ligands in unprecedented abrupt Fe(II) spin crossover complexes
dc.typeArticle de revue
dc.identifier.doi10.1002/chem.201700232
dc.subject.halChimie/Matériaux
bordeaux.journalChemistry - A European Journal
bordeaux.page7052-7065
bordeaux.volume23
bordeaux.issue29
bordeaux.peerReviewedoui
hal.identifierhal-01537646
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01537646v1
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