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Cyanido-Bridged Fe(III)−Mn(III) Heterobimetallic Materials Built From Mn(III) Schiff Base Complexes and Di- or Tri-Cyanido Fe(III) Precursors

hal.structure.identifierCentre de recherches Paul Pascal [CRPP]
dc.contributor.authorSENAPATI, Tapas
hal.structure.identifierCentre de recherches Paul Pascal [CRPP]
dc.contributor.authorPICHON, Céline
hal.structure.identifierCentre de recherches Paul Pascal [CRPP]
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorABABEI, Rodica
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMATHONIÈRE, Corine
hal.structure.identifierMatériaux Moléculaires Magnétiques
hal.structure.identifierCentre de recherches Paul Pascal [CRPP]
dc.contributor.authorCLÉRAC, Rodolphe
dc.date.issued2012
dc.identifier.issn0020-1669
dc.description.abstractEnThe reaction of [FeIIIL(CN)3]− (L being bpca = bis(2- pyridylcarbonyl)amidate, pcq = 8-(pyridine 2-carboxamido)quinoline) or [FeIII(bpb)(CN)2]− (bpb = 1,2-bis(pyridine-2-carboxamido)benzenate) ferric complexes with MnIII salen type complexes afforded seven new bimetallic cyanido-bridged Mn(III)−Fe(III) systems: [Fe(pcq)(CN)3Mn(saltmen)- (CH3OH)]*CH3OH (1) , [Fe(bpca)(CN)3Mn(3-MeO- salen)- (OH2)]*CH3OH*H2O (2), [Fe(bpca)(CN)3Mn(salpen)] (3), [Fe(bpca)- (CN)3Mn(saltmen)] (4), [Fe(bpca)(CN)3Mn(5-Me-saltmen)]*2CHCl3 (5), [Fe(pcq)(CN)3Mn(5-Me-saltmen)]*2CH3OH*0.75H2O (6), and [Fe(bpb)- (CN)2Mn(saltmen)]*2CH3OH (7) (with saltmen2− = N,N′-(1,1,2,2- tetramethylethylene)bis(salicylideneiminato) dianion, salpen2− = N,N′- propylenebis(salicylideneiminato) dianion, salen2− = N,N′-ethylenebis- (salicylideneiminato) dianion). Single crystal X-ray diffraction studies were carried out for all these compounds indicating that compounds 1 and 2 are discrete dinuclear [Fe(III)−CN−Mn(III)] complexes while systems 3−7 are heterometallic chains with {−NC−Fe(III)−CN−Mn(III)} repeating units. These chains are connected through π−π and short contact interactions to form extended supramolecular networks. Investigation of the magnetic properties revealed the occurrence of antiferromagnetic Mn(III)***Fe(III) interactions in 1−4 while ferromagnetic Mn(III)***Fe(III) interactions were detected in 5−7. The nature of these Mn(III)***Fe(III) magnetic interactions mediated by a CN bridge appeared to be dependent on the Schiff base substituent. The packing is also strongly affected by the nature of the substituent and the presence of solvent molecules, resulting in additional antiferromagnetic interdinuclear/interchain interactions. Thus the crystal packing and the supramolecular interactions induce different magnetic properties for these systems. The dinuclear complexes 1 and 2, which possess a paramagnetic ST = 3/2 ground state, interact antiferromagnetically in their crystal packing. At high temperature, the complexes 3−7 exhibit a one-dimensional magnetic behavior, but at low temperature their magnetic properties are modulated by the supramolecular arrangement: a three-dimensional antiferromagnetic order with a metamagnetic behavior is observed for 3, 4, and 7, and Single-Chain Magnet properties are detected for 5 and 6.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.title.enCyanido-Bridged Fe(III)−Mn(III) Heterobimetallic Materials Built From Mn(III) Schiff Base Complexes and Di- or Tri-Cyanido Fe(III) Precursors
dc.typeArticle de revue
dc.identifier.doi10.1021/ic2027708
dc.subject.halChimie/Matériaux
bordeaux.journalInorganic Chemistry
bordeaux.page3796-3812
bordeaux.volume51
bordeaux.issue6
bordeaux.peerReviewedoui
hal.identifierhal-00681411
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00681411v1
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