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Trinuclear CuII Structural isomers: coordination, magnetism, electrochemistry and catalytic activity towards the oxidation of alkanes

2015-07Journal article Restricted access
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dc.contributor.authorSutradhar, Manas
dc.contributor.authorMartins, Luisa
dc.contributor.authorGuedes Da Silva, M. Fátima C.
dc.contributor.authorMahmudov, Kamran
dc.contributor.authorLiu, Cai-Ming
dc.contributor.authorPombeiro, Armando
dc.date.accessioned2018-02-21T08:57:48Z
dc.date.available2018-02-21T08:57:48Z
dc.date.issued2015-07
dc.description.abstractThe reaction of the Schiff base (3,5-di-tert-butyl-2-hydroxybenzylidene)-2-hydroxybenzohydrazide (H3L) with copper(II) nitrate, acetate or metaborate has led to the isomeric complexes [Cu3(L)2(MeOH)4] (1), [Cu3(L)2(MeOH)2]·2MeOH (2) and [Cu3(L)2(MeOH)4] (3), respectively, in which the ligand L exhibits dianionic (HL2–, in 1) or trianionic (L3–, in 2 and 3) pentadentate 1κO,O′,N:2κN′,O″ chelation modes. Complexes 1–3 were characterized by elemental analysis, IR spectroscopy, single-crystal X-ray crystallography, electrochemical methods and variable-temperature magnetic susceptibility measurements, which indicated that the intratrimer antiferromagnetic coupling is strong in the three complexes and that there exists very weak ferromagnetic intermolecular interactions in 1 but weak antiferromagnetic intermolecular interactions in both 2 and 3. Electrochemical experiments showed that in complexes 1–3 the CuII ions can be reduced, in distinct steps, to CuI and Cu0. All the complexes act as efficient catalyst precursors under mild conditions for the peroxidative oxidation of cyclohexane to cyclohexyl hydroperoxide, cyclohexanol and cyclohexanone, leading to overall yields (based on the alkane) of up to 31 % (TON = 1.55 × 103) after 6 h in the presence of pyrazinecarboxylic acid.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMARTINS, Luísa M. D. R. S.; [et al] – Trinuclear CuII Structural isomers: coordination, magnetism, electrochemistry and catalytic activity towards the oxidation of alkanes. EurJIC. ISSN 1099-0682. (2015), pp. 3959-3969.pt_PT
dc.identifier.doi10.1002/ejic.201500440pt_PT
dc.identifier.issn1099-0682
dc.identifier.urihttp://hdl.handle.net/10400.21/8078
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherEurJICpt_PT
dc.relationMETAL CLUSTERS: STRUCTURAL ANALYSIS, APPLICATIONS IN CATALYSIS AND MOLECULAR MAGNETISM
dc.subjectN,O ligandspt_PT
dc.subjectCopperpt_PT
dc.subjectMagnetic propertiespt_PT
dc.subjectElectrochemistrypt_PT
dc.subjectOxidationpt_PT
dc.titleTrinuclear CuII Structural isomers: coordination, magnetism, electrochemistry and catalytic activity towards the oxidation of alkanespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleMETAL CLUSTERS: STRUCTURAL ANALYSIS, APPLICATIONS IN CATALYSIS AND MOLECULAR MAGNETISM
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PEst-OE%2FQUI%2FUI0100%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F86067%2F2012/PT
oaire.citation.endPage3969pt_PT
oaire.citation.startPage3959pt_PT
oaire.fundingStream3599-PPCDT
person.familyNameSutradhar
person.familyNameMartins
person.familyNameGuedes da Silva
person.familyNameMahmudov
person.familyNameLiu
person.familyNamePombeiro
person.givenNameManas
person.givenNameLuisa
person.givenNameM. Fátima C.
person.givenNameKamran
person.givenNameCai-Ming
person.givenNameArmando
person.identifier863180
person.identifier637885
person.identifier789079
person.identifier.ciencia-idD518-3A34-8E31
person.identifier.ciencia-idE218-E297-A4EA
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person.identifier.ciencia-id8311-38FA-CEFB
person.identifier.orcid0000-0003-3349-9154
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person.identifier.orcid0000-0003-4836-2409
person.identifier.orcid0000-0003-0743-6520
person.identifier.orcid0000-0001-7184-6693
person.identifier.orcid0000-0001-8323-888X
person.identifier.ridM-4089-2013
person.identifier.ridG-6210-2011
person.identifier.ridH-8274-2012
person.identifier.ridI-1409-2013
person.identifier.ridD-6937-2013
person.identifier.ridI-5945-2012
person.identifier.scopus-author-id14053084900
person.identifier.scopus-author-id8650947800
person.identifier.scopus-author-id6701761571
person.identifier.scopus-author-id24468352000
person.identifier.scopus-author-id7006067269
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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