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dc.contributor.CRUESPUniversidade Estadual de Campinaspt_BR
dc.typeArtigo de periódicopt_BR
dc.titleChemical environment of copper aggregates embedded in polypyrrole films: The nature of the copper-polypyrrole interactionpt_BR
dc.contributor.authorWatanabe, Npt_BR
dc.contributor.authorMorais, Jpt_BR
dc.contributor.authorAlves, MCMpt_BR
unicamp.author.emailmaria@lnls.brpt_BR
unicamp.authorLab Nacl Luz Sincrotron, BR-13084971 Campinas, Brazil Univ Estadual Campinas, Inst Quim, BR-13083970 Campinas, SP, Brazil Univ Fed Rio Grande do Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazilpt_BR
dc.subject.wosX-ray-absorptionpt_BR
dc.subject.wosElectrocatalytic Oxidationpt_BR
dc.subject.wosElectrochemical Inclusionpt_BR
dc.subject.wosMagnetic-propertiespt_BR
dc.subject.wosMetallic Clusterspt_BR
dc.subject.wosCobalt Compoundspt_BR
dc.subject.wosRedox Processespt_BR
dc.subject.wosSpectroscopypt_BR
dc.subject.wosElectrodepositionpt_BR
dc.subject.wosComplexespt_BR
dc.description.abstractWe report on the structural and electronic properties of copper aggregates embedded in composite polypyrrole films studied by X-ray absorption techniques (XAS). Measurements at the Cu K edge during in situ reduction suggest that the reaction starts with the formation of the complex [-[(C(4)H(2)N)(3)CH(3)(CH(2))(11)OSO(3)(-)](y)Cu(2+)](n) (y = 4), in which the copper is bonded to oxygen atoms. The reduction of this complex leads to the synthesis of Cu metal aggregates in the film. Measurements at, the N K edge evidence that the incorporation of the metal in the polymer network does not disturb the electronic structure nor the environment of the nitrogen from the pyrrole unit. Measurements at the 0 K edge indicate that the metal/polymer interaction happens via hybridization of O 2p and Cu 3d orbitals, resulting in an enlace that has a quasi-covalent character. Scanning electron microscopy measurements show that dendritic-like copper aggregates are formed on the film surface.pt
dc.relation.ispartofJournal Of Physical Chemistry Bpt_BR
dc.relation.ispartofabbreviationJ. Phys. Chem. Bpt_BR
dc.publisher.cityWashingtonpt_BR
dc.publisher.countryEUApt_BR
dc.publisherAmer Chemical Socpt_BR
dc.date.issued2002pt_BR
dc.date.monthofcirculationOCT 31pt_BR
dc.identifier.citationJournal Of Physical Chemistry B. Amer Chemical Soc, v. 106, n. 43, n. 11102, n. 11107, 2002.pt_BR
dc.language.isoenpt_BR
dc.description.volume106pt_BR
dc.description.issuenumber43pt_BR
dc.description.firstpage11102pt_BR
dc.description.lastpage11107pt_BR
dc.rightsfechadopt_BR
dc.sourceWeb of Sciencept_BR
dc.identifier.issn1520-6106pt_BR
dc.identifier.wosidWOS:000178874100006pt_BR
dc.identifier.doi10.1021/jp013940upt_BR
dc.date.available2014-11-18T07:42:12Z
dc.date.available2015-11-26T16:52:38Z-
dc.date.accessioned2014-11-18T07:42:12Z
dc.date.accessioned2015-11-26T16:52:38Z-
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dc.description.provenanceMade available in DSpace on 2015-11-26T16:52:38Z (GMT). No. of bitstreams: 2 WOS000178874100006.pdf: 131423 bytes, checksum: b8364efbab4a9624efe9760e69caa924 (MD5) WOS000178874100006.pdf.txt: 30362 bytes, checksum: 8d71208c4422a2f47833cec2f108d5c4 (MD5) Previous issue date: 2002en
dc.identifier.urihttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/63011pt_BR
dc.identifier.urihttp://www.repositorio.unicamp.br/handle/REPOSIP/63011
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/63011-
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