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The solvation and redox behaviour of mixed ligand copper(II) complexes of acetylacetonate and aromatic diimines in ionic liquids

2014-01-01Journal article Restricted access
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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.accessioned2015-08-24T14:14:34Z
dc.date.available2015-08-24T14:14:34Z
dc.date.issued2014-01-01
dc.description.abstractThe behavior of two cationic copper complexes of acetylacetonate and 2,2'-bipyridine or 1,10-phenanthroline, [Cu(acac)(bipy)]Cl (1) and [Cu(acac)(phen)]Cl (2), in organic solvents and ionic liquids, was studied by spectroscopic and electrochemical techniques. Both complexes showed solvatochromism in ionic liquids although no correlation with solvent parameters could be obtained. By EPR spectroscopy rhombic spectra with well-resolved superhyperfine structure were obtained in most ionic liquids. The spin Hamiltonian parameters suggest a square pyramidal geometry with coordination of the ionic liquid anion. The redox properties of the complexes were investigated by cyclic voltammetry at a Pt electrode (d = 1 mm) in bmimBF(4) and bmimNTf(2) ionic liquids. Both complexes 1 and 2 are electrochemically reduced in these ionic media at more negative potentials than when using organic solvents. This is in agreement with the EPR characterization, which shows lower A(z) and higher g(z) values for the complexes dissolved in ionic liquids, than in organic solvents, due to higher electron density at the copper center. The anion basicity order obtained by EPR is NTf2-, N(CN)(2)(-), MeSO4- and Me2PO4-, which agrees with previous determinations. (C) 2013 Elsevier B.V. All rights reserved.por
dc.identifier.citationNUNES, Patrique; [et al] – The solvation and redox behaviour of mixed ligand copper(II) complexes of acetylacetonate and aromatic diimines in ionic liquids. Inorganica Chimica Acta. ISSN: 0020-1693. Vol. 409 (2014), pp. 465-471por
dc.identifier.doi10.1016/j.ica.2013.09.040
dc.identifier.issn0020-1693
dc.identifier.issn1873-3255
dc.identifier.urihttp://hdl.handle.net/10400.21/4964
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevier Science SApor
dc.subjectCationic copper complexespor
dc.subjectIonic liquidspor
dc.subjectEPRpor
dc.subjectCyclic voltammetrypor
dc.titleThe solvation and redox behaviour of mixed ligand copper(II) complexes of acetylacetonate and aromatic diimines in ionic liquidspor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage471por
oaire.citation.startPage465por
oaire.citation.titleInorganica Chimica Actapor
oaire.citation.volume409por
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
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relation.isAuthorOfPublication.latestForDiscovery11bddabb-dff8-451e-b427-0fda7734f7aa

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