Atividade eletrocatalítica de sistemas biomiméticos da enzima catalase

Detalhes bibliográficos
Autor(a) principal: Matos,Iorquirene de Oliveira
Data de Publicação: 2011
Outros Autores: Alves,Wendel A, Nascimento,Otaciro R
Tipo de documento: Artigo
Idioma: por
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422011000900019
Resumo: In this work, we describe the immobilization of the dinuclear compound [Cu2(apyhist)2Cl2](ClO4)2 (1) and its derived cations complexes, obtained in water solution or by deprotonation of the imidazolate moiety in the ligand leading to a cyclic tetranuclear species, in the Nafion® membrane on glass carbon electrode surface. After that, we studied the influence of the equilibrium in the electrocatalytic activity towards the reduction of H2O2 in the development of an amperometric sensor for the analytical determination of hydrogen peroxide. This strategy proved successful, and the electrochemical behaviour of the all complexes formed within the Nafion® coatings was characterized. We also provide evidence that its related cyclic tetranuclear imidazolate-bridged complex acts as a catalysts for the intramolecular, two-electron reduction of H2O2.
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spelling Atividade eletrocatalítica de sistemas biomiméticos da enzima catalaseenzymeless biosensorscopper(II) complexesbioinorganic chemistryIn this work, we describe the immobilization of the dinuclear compound [Cu2(apyhist)2Cl2](ClO4)2 (1) and its derived cations complexes, obtained in water solution or by deprotonation of the imidazolate moiety in the ligand leading to a cyclic tetranuclear species, in the Nafion® membrane on glass carbon electrode surface. After that, we studied the influence of the equilibrium in the electrocatalytic activity towards the reduction of H2O2 in the development of an amperometric sensor for the analytical determination of hydrogen peroxide. This strategy proved successful, and the electrochemical behaviour of the all complexes formed within the Nafion® coatings was characterized. We also provide evidence that its related cyclic tetranuclear imidazolate-bridged complex acts as a catalysts for the intramolecular, two-electron reduction of H2O2.Sociedade Brasileira de Química2011-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422011000900019Química Nova v.34 n.9 2011reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40422011000900019info:eu-repo/semantics/openAccessMatos,Iorquirene de OliveiraAlves,Wendel ANascimento,Otaciro Rpor2011-11-16T00:00:00Zoai:scielo:S0100-40422011000900019Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2011-11-16T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Atividade eletrocatalítica de sistemas biomiméticos da enzima catalase
title Atividade eletrocatalítica de sistemas biomiméticos da enzima catalase
spellingShingle Atividade eletrocatalítica de sistemas biomiméticos da enzima catalase
Matos,Iorquirene de Oliveira
enzymeless biosensors
copper(II) complexes
bioinorganic chemistry
title_short Atividade eletrocatalítica de sistemas biomiméticos da enzima catalase
title_full Atividade eletrocatalítica de sistemas biomiméticos da enzima catalase
title_fullStr Atividade eletrocatalítica de sistemas biomiméticos da enzima catalase
title_full_unstemmed Atividade eletrocatalítica de sistemas biomiméticos da enzima catalase
title_sort Atividade eletrocatalítica de sistemas biomiméticos da enzima catalase
author Matos,Iorquirene de Oliveira
author_facet Matos,Iorquirene de Oliveira
Alves,Wendel A
Nascimento,Otaciro R
author_role author
author2 Alves,Wendel A
Nascimento,Otaciro R
author2_role author
author
dc.contributor.author.fl_str_mv Matos,Iorquirene de Oliveira
Alves,Wendel A
Nascimento,Otaciro R
dc.subject.por.fl_str_mv enzymeless biosensors
copper(II) complexes
bioinorganic chemistry
topic enzymeless biosensors
copper(II) complexes
bioinorganic chemistry
description In this work, we describe the immobilization of the dinuclear compound [Cu2(apyhist)2Cl2](ClO4)2 (1) and its derived cations complexes, obtained in water solution or by deprotonation of the imidazolate moiety in the ligand leading to a cyclic tetranuclear species, in the Nafion® membrane on glass carbon electrode surface. After that, we studied the influence of the equilibrium in the electrocatalytic activity towards the reduction of H2O2 in the development of an amperometric sensor for the analytical determination of hydrogen peroxide. This strategy proved successful, and the electrochemical behaviour of the all complexes formed within the Nafion® coatings was characterized. We also provide evidence that its related cyclic tetranuclear imidazolate-bridged complex acts as a catalysts for the intramolecular, two-electron reduction of H2O2.
publishDate 2011
dc.date.none.fl_str_mv 2011-09-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422011000900019
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422011000900019
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv 10.1590/S0100-40422011000900019
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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 Química Nova v.34 n.9 2011
reponame:Química Nova (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Química Nova (Online)
collection Química Nova (Online)
repository.name.fl_str_mv Química Nova (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv quimicanova@sbq.org.br
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