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Thermal- and light-induced spin crossover in a guest-dependent dinuclear iron(II) system

hal.structure.identifierSchool of Chemistry
dc.contributor.authorAMOORE, Jarrod J. M.
hal.structure.identifierSchool of Chemistry
dc.contributor.authorNEVILLE, Suzanne M.
hal.structure.identifierSchool of Chemistry
dc.contributor.authorMOUBARAKI, Boujemaa
hal.structure.identifierSchool of Chemistry
dc.contributor.authorIREMONGER, Simon S.
hal.structure.identifierSchool of Chemistry
dc.contributor.authorMURRAY, Keith S.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorLÉTARD, Jean-François
hal.structure.identifierSchool of Chemistry
dc.contributor.authorKEPERT, Cameron J.
dc.date.issued2010
dc.identifier.issn0947-6539
dc.description.abstractEnWe previously reported the dinuclear material [Fe(II) (2)(ddpp)(2)(NCS)(4)] x 4 CH(2)Cl(2) (1 x 4 CH(2)Cl(2); ddpp = 2,5-di(2',2''-dipyridylamino)pyridine) and its partially desolvated analogue (1 x CH(2)Cl(2)), which undergo two- and one-step spin-crossover (SCO) transitions, respectively. Here, we manipulate the type and degree of solvation in this system and find that either a one- or two-step spin transition can be specifically targeted. The chloroform clathrate 1 x 4 CHCl(3) undergoes a relatively abrupt one-step SCO, in which the two equivalent Fe(II) sites within the dinuclear molecule crossover simultaneously. Partial desolvation of 1 x 4 CHCl(3) to form 1 x 3 CHCl(3) and 1 x CHCl(3) occurs through single-crystal-to-single-crystal processes (monoclinic C2/c to P2(1)/n to P2(1)/n) in which the two equivalent Fe(II) sites become inequivalent sites within the dinuclear molecule of each phase. Both 1 x 3 CHCl(3) and 1 x CHCl(3) undergo one-step spin transitions, with the former having a significantly higher SCO temperature than 1 x 4 CHCl(3) and the latter, and each has a broader SCO transition than 1 x 4 CHCl(3), attributable to the overlap of two SCO steps in each case. Further magnetic manipulation can be carried out on these materials through reversibly resolvating the partially desolvated material with chloroform to produce the original one-step SCO, or with dichloromethane to produce a two-step SCO reminiscent of that seen for 1 x 4 CH(2)Cl(2). Furthermore, we investigate the light-induced excited spin state trapping (LIESST) effect on 1 x 4 CH(2)Cl(2) and 1 x CH(2)Cl(2) and observe partial LIESST activity for the former and no activity for the latter.
dc.language.isoen
dc.publisherWiley-VCH Verlag
dc.subject.enClathrates
dc.subject.enHost–guest systems
dc.subject.enIron
dc.subject.enMagnetic properties
dc.subject.enSpin crossover
dc.title.enThermal- and light-induced spin crossover in a guest-dependent dinuclear iron(II) system
dc.typeArticle de revue
dc.identifier.doi10.1002/chem.200901809
dc.subject.halChimie/Matériaux
bordeaux.journalChemistry - A European Journal
bordeaux.page1973-1982
bordeaux.volume16
bordeaux.issue6
bordeaux.peerReviewedoui
hal.identifierhal-00472222
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00472222v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Chemistry%20-%20A%20European%20Journal&rft.date=2010&rft.volume=16&rft.issue=6&rft.spage=1973-1982&rft.epage=1973-1982&rft.eissn=0947-6539&rft.issn=0947-6539&rft.au=AMOORE,%20Jarrod%20J.%20M.&NEVILLE,%20Suzanne%20M.&MOUBARAKI,%20Boujemaa&IREMONGER,%20Simon%20S.&MURRAY,%20Keith%20S.&rft.genre=article


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