Melanin-like units concentration effects in melanin-like/vanadium pentoxide hybrid compounds

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorArashiro, Everaldo-
Autor(es): dc.creatorZampronio, Elaine Cabrini-
Autor(es): dc.creatorBrunello, Carlos Alberto-
Autor(es): dc.creatorLassali, Tânia Aparecida Farias-
Autor(es): dc.creatorOliveira, Herenilton Paulino-
Autor(es): dc.creatorGraeff, Carlos Frederico de Oliveira-
Data de aceite: dc.date.accessioned2019-11-06T13:25:44Z-
Data de disponibilização: dc.date.available2019-11-06T13:25:44Z-
Data de envio: dc.date.issued2012-11-29-
Data de envio: dc.date.issued2012-11-29-
Data de envio: dc.date.issued2001-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/123456789/1891-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/555167-
Descrição: dc.descriptionAn intercalated material has been prepared consisting of a regular alternation of organic/inorganic layers. The films were obtained by reacting 3,4-dihydroxy-phenylalanine (dl-DOPA) with varying concentrations in a solution with freshly prepared HVO3, which suffered a oxidative polymerization/intercalation ‘in situ’ process, forming a green suspension, in which after de-hydration at room temperature produces a nanocomposite with a dark blue metallic color. Films (C8H9NO2)xV2O5•nH2O were characterized using FT–IR, ESR, powder X-ray diffraction, conductivity, and cyclic voltammetry. The X-ray diffractograms indicate that the lamellar structure of the V2O5 is preserved for low concentrations of melanin-likeunits (x<0.02), but the inter-planar space increases from 1.2 nm to ca. 1.5 nm. The FT–IR and ESR spectra confirm that the V2O5 structure is preserved, however the presence of melanin-likeunits induces the reduction of V(V) ions to V(IV) ions. The melanin insertion is observed to increase the stability and reproducibility of the electrochemical insertion/de-insertion of Li+. The incorporation of melanin-like structures increases the conductivity, followed by a decrease in its temperature activation energy.-
Idioma: dc.languageen-
Direitos: dc.rightsO Periódico International Journal of Inorganic Materials concede permissão para depósito do artigo no Repositório Institucional da UFOP. Número da licença: 3347780114015.-
Palavras-chave: dc.subjectVanadium pentoxide xerogel-
Palavras-chave: dc.subjectMelanin and nanocomposite-
Palavras-chave: dc.subjectIntercalation compounds-
Título: dc.titleMelanin-like units concentration effects in melanin-like/vanadium pentoxide hybrid compounds-
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