The effect of the orientation of the Jahn-Teller distortion on the magnetic interactions of trinuclear mixed-valence Mn(II)/Mn(III) complexes

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dc.contributor.authorBikas, Rahman
dc.contributor.authorShahmoradi, Elaheh
dc.contributor.authorReinoso, Santiago
dc.contributor.authorEmami, Marzieh
dc.contributor.authorLezama, Luis
dc.contributor.authorSanchiz, Joaquín
dc.contributor.authorNoshiranzadeh, Nader
dc.contributor.departmentInstitute for Advanced Materials and Mathematics - INAMAT2en
dc.contributor.funderUniversidad Pública de Navarra / Nafarroako Unibertsitate Publikoaes
dc.date.accessioned2020-03-23T09:23:54Z
dc.date.available2020-08-27T23:00:23Z
dc.date.issued2019
dc.description.abstractTwo new trinuclear manganese complexes, [Mn3(L1)(μ-OCH3)2(N3)2]·CH3OH (1) and [Mn3(L2)(μ-OCH3)2(N3)2]·CH3OH (2), have been obtained from the reaction of Mn(OAc)2 4H2O, NaN3 and the preformed N6O4-donor H4L1 or H4L2 compartmental ligands, which are synthesized via Schiff base condensation of pentaethylenehexamine with 2-hydroxybenzaldehyde or 2-hydroxy-3-methoxybenzaldehye, respectively. Complexes 1 and 2 have been characterized by spectroscopic methods and single-crystal X-ray analysis. The structural studies indicate that both 1 and 2 are mixed-valence complexes containing angular Mn(III)-Mn(II)-Mn(III) cores in which the metal centers are connected to each other by phenoxido and methoxido bridging groups. The coordination environment around the manganese ions is analogous in both complexes, but for a change in the direction of the Jahn-Teller distortion around the external Mn(III) ions when going from 1 to 2, which is mainly attributed to the steric effect of different substituents on the phenyl rings of the ligands. The analysis of the magnetic susceptibility data indicates the presence of antiferromagnetic intramolecular coupling in both complexes, but the interaction in 1 was found to be nearly one order of magnitude weaker than that in 2. This fact is rationalized on the basis of the different orientation of the Jahn-Teller distortion, which modifies the magnetic exchange pathway through the phenoxido bridges from the equatorial-axial connection type observed in 1 to the axial-axial linkages displayed by 2.en
dc.description.sponsorshipThe authors are grateful to Imam Khomeini International University and the University of Zanjan for the financial support of this study. S.R. thanks Obra Social La Caixa, Fundación Caja Navarra and Universidad Pública de Navarra for a research contract in the framework of the program 'Captación del Talento'.en
dc.embargo.lift2020-08-27
dc.embargo.terms2020-08-27
dc.format.extent15 p.
dc.format.mimetypeapplication/pdfen
dc.identifier.doi10.1039/c9dt01652j
dc.identifier.issn1477-9226
dc.identifier.urihttps://academica-e.unavarra.es/handle/2454/36563
dc.language.isoengen
dc.publisherRoyal Society of Chemistryen
dc.relation.ispartofDalton Transactions, 2019, 48 (36), 13799-13812en
dc.relation.publisherversionhttps://doi.org/10.1039/c9dt01652j
dc.rights© The Royal Society of Chemistry 2019en
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.subjectJahn-Teller distortionen
dc.subjectMagnetic interactionsen
dc.subjectManganeseen
dc.titleThe effect of the orientation of the Jahn-Teller distortion on the magnetic interactions of trinuclear mixed-valence Mn(II)/Mn(III) complexesen
dc.typeinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/acceptedVersion
dspace.entity.typePublication
relation.isAuthorOfPublication46bbf241-764d-4c78-9667-4c307cf84092
relation.isAuthorOfPublication.latestForDiscovery46bbf241-764d-4c78-9667-4c307cf84092

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