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Type: Artigo de evento
Title: 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
Author: Ramos A.R.
Arguello J.
Magosso H.A.
Gushikem Y.
Abstract: A 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 Al 2O3/3-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. ©2008 Sociedade Brasileira de Química.
Rights: aberto
Identifier DOI: 
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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