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Spin crossover and solvate effects in 1D feII chain compounds containing bis(dipyridylamine)-linked triazine ligands

hal.structure.identifierSchool of Chemistry
dc.contributor.authorROSS, Tamsyn M.
hal.structure.identifierSchool of Chemistry
dc.contributor.authorMOUBARAKI, Boujemaa
hal.structure.identifierSchool of Chemistry
dc.contributor.authorTURNER, David R.
hal.structure.identifierX-ray Science Division [XSD]
dc.contributor.authorHALDER, Gregory J.
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.authorNEVILLE, Suzanne M.
hal.structure.identifierSchool of Physics
dc.contributor.authorCASHION, John D.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorLETARD, Jean-François
hal.structure.identifierSchool of Chemistry
dc.contributor.authorBATTEN, Stuart R.
hal.structure.identifierSchool of Chemistry
dc.contributor.authorMURRAY, Keith S.
dc.date.issued2011
dc.identifier.issn1434-1948
dc.description.abstractEnA series of 1D polymeric Fe<sup>II</sup> spin crossover (SCO) compounds of type <em>trans</em>-[Fe<sup>II</sup>(NCX)<sub>2</sub>(L)]<b>·</b>Solvent has been synthesised {L = DPPyT = 1-[4,6-bis(dipyridin-2-ylamino)-1,3,5-triazin-2-yl]pyridin-4(1<em>H</em>)-one for <b>1</b>–<b>4</b>; NCX = NCS<sup>–</sup> for <b>1</b> and <b>2</b>, NCSe<sup>–</sup> for <b>3</b> and <b>4</b>; Solvent = 2.5CH<sub>2</sub>Cl<sub>2</sub> for <b>1</b>, 2CHCl<sub>3</sub><b>·</b>0.5CH<sub>3</sub>OH for <b>2</b> and <b>4</b>, CH<sub>2</sub>Cl<sub>2</sub> for <b>3</b>; L = DPT (6-phenoxy-<em>N</em><sup>2</sup>,<em>N</em><sup>2</sup>,<em>N</em><sup>4</sup>,<em>N</em><sup>4</sup>-tetra-2-pyridinyl-1,3,5-triazine-2,4-diamine) for <b>5</b>; NCX = NCS<sup>–</sup> for <b>5</b>; Solvent = 2CH<sub>3</sub>OH<b>·</b>H<sub>2</sub>O for <b>5</b>; L = DQT {4-[4,6-bis(dipyridin-2-ylamino)-1,3,5-triazin-2-yloxy]phenol} for <b>6</b>–<b>8</b>; NCX<sup>–</sup> = NCS<sup>–</sup> for <b>6</b>; Solvent = 2CH<sub>2</sub>Cl<sub>2</sub> for <b>6</b>; NCX<sup>–</sup> = NCSe<sup>–</sup> for <b>7</b>; Solvent = CH<sub>2</sub>Cl<sub>2</sub><b>·</b>CH<sub>2</sub>ClCH<sub>2</sub>Cl for <b>7</b>; NCX<sup>–</sup> = NCSe<sup>–</sup> for <b>8</b>; Solvent = 1.5CH<sub>2</sub>Cl<sub>2</sub><b>·</b>0.5CH<sub>3</sub>OH for <b>8</b>}. Two mononuclear complexes, <em>trans</em>-[Fe<sup>II</sup>(NCS)<sub>2</sub>(DPT)<sub>2</sub>]<b>·</b>2CH<sub>3</sub>OH (<b>9</b>) and <em>trans</em>-[Fe<sup>II</sup>(NCSe)<sub>2</sub>(DPT)<sub>2</sub>]<b>·</b>2CH<sub>3</sub>OH (<b>10</b>), contained the L ligand in a terminal bidentate coordination mode. As well as variations made in the NCX<sup>–</sup> ligands, variations were also made in substituent groups on the <em>s</em>-triazine “core” of L to investigate their intermolecular/supramolecular role in crystal packing and, thus, their influence on SCO properties. All the complexes crystallised as solvates, and the influence of the latter on the magnetism and spin transitions was explored. A wide range of physical methods was employed, as a function of temperature, viz. crystallography, PXRD (synchrotron), susceptibilities, LIESST and Mössbauer effect, in order to probe magnetostructural correlations in these 1D families. New examples of half-crossovers, with ordered –LS–HS–LS–HS– intrachain states existing below <em>T</em><sub>1/2</sub>, have been observed and comparisons made to related one- or two-step systems. All the observed transitions are gradual and non-hysteretic, and brief comments are made in relation to recent theoretical models for cooperativity, developed elsewhere.
dc.language.isoen
dc.publisherWiley-VCH Verlag
dc.title.enSpin crossover and solvate effects in 1D feII chain compounds containing bis(dipyridylamine)-linked triazine ligands
dc.typeArticle de revue
dc.identifier.doi10.1002/ejic.201000876
dc.subject.halChimie/Matériaux
bordeaux.journalEuropean Journal of Inorganic Chemistry
bordeaux.page1395-1417
bordeaux.issue9
bordeaux.peerReviewedoui
hal.identifierhal-00577832
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00577832v1
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