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One-Dimensional Thiocyanato-Bridged Fe(II) Spin Crossover Cooperative Polymer With Unusual FeN5S Coordination Sphere

hal.structure.identifierUniversité Mouloud Mammeri [Tizi Ouzou] [UMMTO]
hal.structure.identifierChimie, Electrochimie Moléculaires et Chimie Analytique [CEMCA]
dc.contributor.authorNEBBALI, Kahina
hal.structure.identifierChimie, Electrochimie Moléculaires et Chimie Analytique [CEMCA]
dc.contributor.authorMEKUIMEMBA, Cle Donacier
hal.structure.identifierChimie, Electrochimie Moléculaires et Chimie Analytique [CEMCA]
dc.contributor.authorCHARLES, Catherine
hal.structure.identifierUniversité Mouloud Mammeri [Tizi Ouzou] [UMMTO]
dc.contributor.authorYEFSAH, Said
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCHASTANET, Guillaume
hal.structure.identifierDepartamento de Química Inorgánica
dc.contributor.authorMOTA, Antonio J.
hal.structure.identifierDepartamento de Química Inorgánica
dc.contributor.authorCOLACIO, Enrique
hal.structure.identifierChimie, Electrochimie Moléculaires et Chimie Analytique [CEMCA]
dc.contributor.authorTRIKI, Smail
dc.date.issued2018
dc.identifier.issn0020-1669
dc.description.abstractEnWe present here a novel example of spin crossover phenomenon on a Fe(II) one-dimensional chain with unusual N5S coordination sphere. The [{Fe(tpc-OMe)(NCS)(μ-NCS)}n] (1) compound was prepared using the tridentate tpc-OMe ligand (tpc-OMe = tris(2-pyridyl)methoxymethane), FeCl2·4H2O, and the KSCN salt. Crystallographic investigations revealed that the Fe(II) ions are connected by a single bridging NCS– ligand (μ-κN:κS-SCN coordination mode) to afford a zigzag neutral chain running along the [010] direction, in which the thiocyanato bridging groups adopt a cis head-to-tail configuration. The (N5S) metal environment arises from one thiocyanato-κS and two thiocyanato-κN ligands and from three pyridine of the fac-tpc-OMe tripodal ligand. This compound presents a unique extension of Fe(II) binuclear complexes into linear chains built on similar tripodal ligands and bridging thiocyanate anions. Compound 1 shows a spin crossover (SCO) behavior which has been evidenced by magnetic, calorimetric, and structural investigations, revealing a sharp cooperative spin transition with a transition temperature of ca. 199 K. Temperature scan rate studies revealed a very narrow hysteresis loop (∼1 K wide). Photoswitching of this compound was also performed, evidencing a very fast relaxation process at low temperature. Among other factors, the linearity of the N-bound terminal thiocyanato ligand appears as the main structural characteristic at the origin of the presence of the SCO transition in compound 1 and in the two others Fe(II) previous systems involving thiocyanato-bridges and tripodal tris(2-pyridyl)methane ligands.
dc.description.sponsorshipBistabilité magnétique dans de nouveaux systèmes moléculaires à base de ligands anioniques pontants - ANR-12-BS07-0030
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.subject.enthiocyanato bridges
dc.subject.enFeN5S coordination sphere
dc.subject.enFe(II) spin crossover (SCO) coordination polymer
dc.subject.enSCO transition
dc.title.enOne-Dimensional Thiocyanato-Bridged Fe(II) Spin Crossover Cooperative Polymer With Unusual FeN5S Coordination Sphere
dc.typeArticle de revue
dc.identifier.doi10.1021/acs.inorgchem.8b02061
dc.subject.halChimie/Chimie de coordination
dc.subject.halChimie/Polymères
bordeaux.journalInorganic Chemistry
bordeaux.page12338–12346
bordeaux.volume57
bordeaux.issue19
bordeaux.peerReviewedoui
hal.identifierhal-01872926
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01872926v1
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