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The solvation and electrochemical behaviour of Copper acetylacetonate complexes in ionic liquids

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dc.contributor.authorNunes, Patrique
dc.contributor.authorNagy, Nora V.
dc.contributor.authorAlegria, Elisabete
dc.contributor.authorPombeiro, Armando
dc.contributor.authorCorreia, Isabel
dc.date.accessioned2015-08-24T14:11:14Z
dc.date.available2015-08-24T14:11:14Z
dc.date.issued2014
dc.description.abstractThe behavior of copper(II) complexes of pentane-2,4-dione and 1,1,1,5,5,5-hexafluoro-2,4-pentanedione, [Cu(acac)(2) (1) and [Cu(HFacac)(2)(H2O)] (2), in ionic liquids and molecular organic solvents, was studied by spectroscopic and electrochemical techniques. The electron paramagnetic resonance characterization (EPR) showed well-resolved spectra in most solvents. In general the EPR spectra of [Cu(acac)(2)] show higher g(z) values and lower hyperfine coupling constants, A(z), in ionic liquids than in organic solvents, in agreement with longer Cu-O bond lengths and higher electron charge in the copper ion in the ionic liquids, suggesting coordination of the ionic liquid anions. For [Cu(HFacac)(2)(H2O)] the opposite was observed suggesting that in ionic liquids there is no coordination of the anions and that the complex is tetrahedrically distorted. The redox properties of the Cu(II) complexes were investigated by cyclic voltammetry (CV) at a Pt electrode (d = 1 mm), in bmimBF(4) and bmimNTf(2) ionic liquids and, for comparative purposes, in neat organic solvents. The neutral copper(II) complexes undergo irreversible reductions to Cu(I) and Cu(0) species in both ILs and common organic solvents (CH2Cl2 or acetonitrile), but, in ILs, they are usually more easier to reduce (less cathodic reduction potential) than in the organic solvents. Moreover, 1 and 2 are easier to reduce in bmimNTf(2) than in bmimBF(4) ionic liquid. (C) 2013 Elsevier B.V. All rights reserved.por
dc.identifier.citationNUNES, Patrique; [et al] – The solvation and electrochemical behaviour of Copper acetylacetonate complexes in ionic liquids. Journal of Molecular Structure. ISSN: 0022-2860. Vol. 160 (2014), pp. 142-149por
dc.identifier.doi10.1016/j.molstruc.2013.12.025
dc.identifier.issn0022-2860
dc.identifier.issn1872-8014
dc.identifier.urihttp://hdl.handle.net/10400.21/4963
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevier Science BVpor
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S0020169313005252#
dc.subjectCopper complexespor
dc.subjectIonic liquidspor
dc.subjectEPRpor
dc.subjectSalvationpor
dc.subjectVoltammetrypor
dc.titleThe solvation and electrochemical behaviour of Copper acetylacetonate complexes in ionic liquidspor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage149por
oaire.citation.startPage142por
oaire.citation.titleJournal of Molecular Structurepor
oaire.citation.volume160por
person.familyNameNunes
person.familyNameAlegria
person.familyNamePombeiro
person.givenNamePatrique
person.givenNameElisabete
person.givenNameArmando
person.identifier863202
person.identifier.ciencia-id8C1F-851A-9F1C
person.identifier.ciencia-id8311-38FA-CEFB
person.identifier.orcid0000-0003-1693-1267
person.identifier.orcid0000-0003-4060-1057
person.identifier.orcid0000-0001-8323-888X
person.identifier.ridE-9945-2012
person.identifier.ridI-5945-2012
person.identifier.scopus-author-id56002785300
person.identifier.scopus-author-id8315848300
person.identifier.scopus-author-id7006067269
rcaap.rightsclosedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication11bddabb-dff8-451e-b427-0fda7734f7aa
relation.isAuthorOfPublication6d781c38-c45e-4159-b795-8c8675606160
relation.isAuthorOfPublication6d18ff2e-5c33-4010-b1e7-964c72349813
relation.isAuthorOfPublication.latestForDiscovery6d18ff2e-5c33-4010-b1e7-964c72349813

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