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hal.structure.identifierPostgraduate Department of Chemistry, Panskura Banamali College
dc.contributor.authorJANA, Narayan Ch.
hal.structure.identifierCICECO, Department of Chemistry
dc.contributor.authorBRANDÃO, Paula
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMATHONIÈRE, Corine
hal.structure.identifierPostgraduate Department of Chemistry, Panskura Banamali College
dc.contributor.authorPANJA, Anangamohan
dc.date.issued2018-04
dc.identifier.issn0277-5387
dc.description.abstractEnThe design of molecule-based systems with tuneable optical and/or magnetic properties has attracted considerable attention because of their potential applications in high-performance molecule-based electronic devices, switches, sensors and displays. In this regard, a large number of valence tautomeric tetraoxolene-bridged dinuclear cobalt complexes with tetradentate ancillary ligands have been reported, but none of these complexes contained a bidentate terminal ligand. In order to increase the scope in this field, the present report describes the synthesis, structures, electrochemical and magnetic studies of two dinuclear cobalt-tetraoxolene complexes, [Co2(dhbq)(bpy)4](PF6)3 (1(PF6)3) and [Co2(dhbq)(bpa)4](PF6)3·6H2O (2(PF6)3·6H2O), where H2dhbq is 2,5-dihydroxy-1,4-benzoquinone, with the bidentate terminal ligands 2,2′-bipyridine (bpy) and 2,2′-bipyridyl amine (bpa), respectively. An X-ray diffraction study reveals that the dianionic form of the redox active tetraoxolene ligand bridges the metal centers in these complexes, and one metal center is in the high spin cobalt(II) state while the other one is in the low spin cobalt(III) state. The present report will increase knowledge on the synthesis of such systems using bidentate terminal ligands. Variable temperature magnetic susceptibility measurements show no indication for valence tautomerism (VT) in either complex. Further attempts could be made to synthesize similar complexes from different solvents and/or using different counter ions to check whether such variations can bring VT in these systems.
dc.language.isoen
dc.publisherElsevier
dc.subject.en2
dc.subject.en5-Dihydroxy-1
dc.subject.en4-benzoquinonate ligand
dc.subject.enDinuclear cobalt(II)/cobalt(III) complexes
dc.subject.enCrystal structures
dc.subject.enCyclic voltammetry
dc.subject.enMagnetic study
dc.title.enSynthesis, structure and magnetic properties of dinuclear cobalt-tetraoxolene complexes with bidentate terminal ligands
dc.typeArticle de revue
dc.identifier.doi10.1016/j.poly.2017.12.038
dc.subject.halChimie/Matériaux
bordeaux.journalPolyhedron
bordeaux.page152-157
bordeaux.volume144
bordeaux.peerReviewedoui
hal.identifierhal-01728043
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01728043v1
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