Electroreduction of dipyridamole at mercury-coated platinum microelectrode

Detalhes bibliográficos
Autor(a) principal: Toledo,Renata A. de
Data de Publicação: 2004
Outros Autores: Castilho,Marilza, Mazo,Luiz Henrique
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of the Brazilian Chemical Society (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532004000300011
Resumo: The electroreduction of Dipyridamole (DIP) was studied in 0.10 mol L-1 phosphate buffer solution (pH 3.0) on a mercury coated platinum microelectrode (Hg-ME), employing cyclic, linear sweep voltammetry and polarography techniques. The similarity between Hg-ME voltammetric profile and the sigmoidal polarographic waves both with a diffusion limited current is showed. Experiments with a hanging mercury drop electrode (HMDE) were performed in parallel to confirm the results obtained with Hg-ME, which indicated that the reduction occurs in two irreversible steps involving two electrons and two protons each step. The limiting diffusion current, concerning the first step, allows estimating the diffusion coefficient for DIP as being equal to 2.04 x 10-5 cm² s-1.
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spelling Electroreduction of dipyridamole at mercury-coated platinum microelectrodedipyridamoleelectroreductionmercury-coated platinum microelectrodevoltammetryThe electroreduction of Dipyridamole (DIP) was studied in 0.10 mol L-1 phosphate buffer solution (pH 3.0) on a mercury coated platinum microelectrode (Hg-ME), employing cyclic, linear sweep voltammetry and polarography techniques. The similarity between Hg-ME voltammetric profile and the sigmoidal polarographic waves both with a diffusion limited current is showed. Experiments with a hanging mercury drop electrode (HMDE) were performed in parallel to confirm the results obtained with Hg-ME, which indicated that the reduction occurs in two irreversible steps involving two electrons and two protons each step. The limiting diffusion current, concerning the first step, allows estimating the diffusion coefficient for DIP as being equal to 2.04 x 10-5 cm² s-1.Sociedade Brasileira de Química2004-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532004000300011Journal of the Brazilian Chemical Society v.15 n.3 2004reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532004000300011info:eu-repo/semantics/openAccessToledo,Renata A. deCastilho,MarilzaMazo,Luiz Henriqueeng2004-06-16T00:00:00Zoai:scielo:S0103-50532004000300011Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2004-06-16T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Electroreduction of dipyridamole at mercury-coated platinum microelectrode
title Electroreduction of dipyridamole at mercury-coated platinum microelectrode
spellingShingle Electroreduction of dipyridamole at mercury-coated platinum microelectrode
Toledo,Renata A. de
dipyridamole
electroreduction
mercury-coated platinum microelectrode
voltammetry
title_short Electroreduction of dipyridamole at mercury-coated platinum microelectrode
title_full Electroreduction of dipyridamole at mercury-coated platinum microelectrode
title_fullStr Electroreduction of dipyridamole at mercury-coated platinum microelectrode
title_full_unstemmed Electroreduction of dipyridamole at mercury-coated platinum microelectrode
title_sort Electroreduction of dipyridamole at mercury-coated platinum microelectrode
author Toledo,Renata A. de
author_facet Toledo,Renata A. de
Castilho,Marilza
Mazo,Luiz Henrique
author_role author
author2 Castilho,Marilza
Mazo,Luiz Henrique
author2_role author
author
dc.contributor.author.fl_str_mv Toledo,Renata A. de
Castilho,Marilza
Mazo,Luiz Henrique
dc.subject.por.fl_str_mv dipyridamole
electroreduction
mercury-coated platinum microelectrode
voltammetry
topic dipyridamole
electroreduction
mercury-coated platinum microelectrode
voltammetry
description The electroreduction of Dipyridamole (DIP) was studied in 0.10 mol L-1 phosphate buffer solution (pH 3.0) on a mercury coated platinum microelectrode (Hg-ME), employing cyclic, linear sweep voltammetry and polarography techniques. The similarity between Hg-ME voltammetric profile and the sigmoidal polarographic waves both with a diffusion limited current is showed. Experiments with a hanging mercury drop electrode (HMDE) were performed in parallel to confirm the results obtained with Hg-ME, which indicated that the reduction occurs in two irreversible steps involving two electrons and two protons each step. The limiting diffusion current, concerning the first step, allows estimating the diffusion coefficient for DIP as being equal to 2.04 x 10-5 cm² s-1.
publishDate 2004
dc.date.none.fl_str_mv 2004-06-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532004000300011
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532004000300011
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50532004000300011
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Journal of the Brazilian Chemical Society v.15 n.3 2004
reponame:Journal of the Brazilian Chemical Society (Online)
instname:Sociedade Brasileira de Química (SBQ)
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instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Journal of the Brazilian Chemical Society (Online)
collection Journal of the Brazilian Chemical Society (Online)
repository.name.fl_str_mv Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv ||office@jbcs.sbq.org.br
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