Al2O3 coated with 3-n-propyl-1-azonia-4-azabicyclo[2.2.2]octane silsesquioxane chloride and its use for immobilization of cobalt(II) tetrasulfonated phthalocyanine in oxalic acid electrooxidation

dc.creatorRamos, André R.
dc.creatorArguello, Jacqueline
dc.creatorMagosso, Hérica A.
dc.creatorGushikem, Yoshitaka
dc.date2008-01-01
dc.date2014-07-17T17:20:49Z
dc.date2015-11-26T11:56:44Z
dc.date2014-07-17T17:20:49Z
dc.date2015-11-26T11:56:44Z
dc.date.accessioned2018-03-28T20:59:39Z
dc.date.available2018-03-28T20:59:39Z
dc.identifierJournal of the Brazilian Chemical Society. Sociedade Brasileira de Química, v. 19, n. 4, p. 755-761, 2008.
dc.identifier0103-5053
dc.identifierS0103-50532008000400020
dc.identifier10.1590/S0103-50532008000400020
dc.identifierhttp://dx.doi.org/10.1590/S0103-50532008000400020
dc.identifierhttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532008000400020
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/25277
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/25277
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1238581
dc.descriptionA water-soluble polymer prepared by sol-gel process, 3-n-propyl-1-azonia-4-azabicyclo[2.2.2]octane silsesquioxane chloride, was adsorbed on alumina surface. This polymer-coated alumina was able to effectively immobilize cobalt(II) tetrasulfonated phthalocyanine complexes as counter ions. Cobalt phthalocyanine immobilized in this way is well and tightly adsorbed on Al2O3/3-n-propyl-1-azonia-4-azabicyclo[2.2.2]octane silsesquioxane chloride surface. Furthermore, when incorporated to a carbon paste electrode showed a good electrocatalytic response toward the acid oxalic oxidation, making it a suitable electrode material. A linear relationship (r = 0.998) between the current responses obtained by chronoamperometric measurements and the oxalic acid concentration in the range of 7.4 × 10-5 - 9.1 × 10-4 mol L-1 was observed. A detection limit of 18 µmol L-1 was also determined.
dc.descriptionUm polímero solúvel em água, preparado pelo método sol-gel e designado cloreto de 3-n-propil-1-azonia-4-azabiciclo[2.2.2]octano silsesquioxano, foi adsorvido sobre a superfície da alumina. Essa alumina recoberta com o polímero foi capaz de imobilizar efetivamente complexos de ftalocianina tetrassulfonada metalada com Co(II) como contra-íons. A ftalocianina de cobalto imobilizada dessa forma fica fortemente aderida sobre a superfície do cloreto de Al2O3/3-n-propil-1-azonia-4-azabiciclo[2.2.2]octano silsesquioxano. Além disso, quando incorporada a um eletrodo de pasta de carbono mostra uma boa resposta eletrocatalítica para a oxidação de ácido oxálico. Foi obtida uma relação linear (r = 0,998) para o gráfico de correntes de resposta obtidas por cronoamperometria e a concentração de ácido oxálico na faixa de 7.4 ×10-5 a 9.1 × 10-4 mol L-1. O limite de detecção determinado foi igual a 18 µmol L-1.
dc.description755
dc.description761
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageen
dc.publisherSociedade Brasileira de Química
dc.relationJournal of the Brazilian Chemical Society
dc.rightsaberto
dc.sourceSciELO
dc.subject3-n-propyl-1-azonia-4-azabicyclo[2.2.2]octanesilsesquioxane chloride
dc.subjectcobalt(II) tetrasulfonated phthalocyanine
dc.subjectoxalic acid electrocatalytic oxidation
dc.titleAl2O3 coated with 3-n-propyl-1-azonia-4-azabicyclo[2.2.2]octane silsesquioxane chloride and its use for immobilization of cobalt(II) tetrasulfonated phthalocyanine in oxalic acid electrooxidation
dc.typeArtículos de revistas


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