A novel series of vanadium-sulfite polyoxometalates: synthesis, structural, and physical studies

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dc.contributor.authorMiras, H. N.en
dc.contributor.authorRaptis, R. G.en
dc.contributor.authorLalioti, N.en
dc.contributor.authorSigalas, M. P.en
dc.contributor.authorBaran, P.en
dc.contributor.authorKabanos, T. A.en
dc.date.accessioned2015-11-24T16:57:38Z
dc.date.available2015-11-24T16:57:38Z
dc.identifier.issn0947-6539-
dc.identifier.urihttps://olympias.lib.uoi.gr/jspui/handle/123456789/10601
dc.rightsDefault Licence-
dc.subjectdensity functional calculationsen
dc.subjectpolyoxometalatesen
dc.subjectstructure elucidationen
dc.subjectsulfitesen
dc.subjectvanadiumen
dc.subjectstate coordination chemistryen
dc.subjectstructure-reactivity relationshipsen
dc.subjectsecondary building unitsen
dc.subjectsolid-stateen
dc.subjectmagnetic-propertiesen
dc.subjectalkylammonium molybdatesen
dc.subjecthydrothermal synthesesen
dc.subjectself-organizationen
dc.subjectcrystal-structureen
dc.subjectsulfur-dioxideen
dc.titleA novel series of vanadium-sulfite polyoxometalates: synthesis, structural, and physical studiesen
heal.abstractReaction of NH4VO3 with sulfur dioxide affords the hexanuclear cluster (NH4)(2)(Et4N)[((VO)-O-IV)(6)(mu(4)-O)(2)(mu(3)-OH)(2)(mu(3)-SO3)(4)(H2O)(2)]Cl center dot H2O (1), and the decapentanuclear host-guest compound (Et4N)(5){Cl subset of[(VO)(15)(mu(3)-O)(18)(mu-O)(3)]}center dot 3H(2)O (2). Sequential addition of magnesium oxide to an acidic aqueous solution of NH4VO3 (pH approximate to 0) followed by (NH4)(2)SO3 resulted in the formation of either the non-oxo polymeric vanadium(IV) compound trans-(NH4)(2)[V-IV(OH)(2)(mu-SO3)(2)] (3) or the polymeric oxovanadium(IV) sulfite (NH4)[(VO)-O-IV-(SO3)(1.5)(H2O)]center dot 2.5 H2O (4) at pH values of 6 and 4, respectively. The decameric vanadium(v) compound {Na-4(mu-H2O)(8)(H2O)(6)} [Mg(H2O)(6)][V-10(V)(O)(8)(mu(6)-O)(2)(mu(3)-O)(14)]center dot 3H(2)O (5) was synthesised by treating an acidic aqueous solution of NH4VO3 with MgO and addition of NaOH to pH approximate to 6. All the compounds were characterised by single-crystal Xray structure analysis. The crystal structure of compound I revealed an unprecedented structural motif of a cubane unit [M-4(mu(4)-O)(2)(mu 3-OH)(2)] connected to two other metal atoms. Compound 3 comprises a rare example of a non-oxo vanadium(IV) species isolated from aqueous solution and in the presence of the reducing agent SO32-, while compound 4 represents a rare example of an open-framework species isolated at room temperature (20 degrees C). In addition to the synthesis and crystallographic studies, we report the IR and magnetic properties (for 1, 2 and 3) of these vanadium clusters as well as theoretical studies on compound 3.en
heal.accesscampus-
heal.fullTextAvailabilityTRUE-
heal.identifier.primaryDOI 10.1002/chem.200400203-
heal.identifier.secondary<Go to ISI>://000228412500004-
heal.identifier.secondaryhttp://onlinelibrary.wiley.com/store/10.1002/chem.200400203/asset/2295_ftp.pdf?v=1&t=h0dvuzfp&s=cac28920970d418377433c0a88642538c6c08088-
heal.journalNameChemistry-a European Journalen
heal.journalTypepeer reviewed-
heal.languageen-
heal.publicationDate2005-
heal.publisherWiley-VCH Verlagen
heal.recordProviderΠανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείαςel
heal.typejournalArticle-
heal.type.elΆρθρο Περιοδικούel
heal.type.enJournal articleen

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