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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
André R. Ramos [1] ; Jacqueline Arguello [2] ; Hérica A. Magosso [3] ; Yoshitaka Gushikem [4]
Total Authors: 4
Affiliation:
[1] Universidade Estadual de Campinas. Instituto de Química - Brasil
[2] Universidade Estadual de Campinas. Instituto de Química - Brasil
[3] Universidade Estadual de Campinas. Instituto de Química - Brasil
[4] Universidade Estadual de Campinas. Instituto de Química - Brasil
Total Affiliations: 4
Document type: Journal article
Source: Journal of the Brazilian Chemical Society; v. 19, n. 4, p. 755-761, 2008-00-00.
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 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. (AU)

FAPESP's process: 00/11103-5 - Porous materials: preparation, properties and applications
Grantee:Yoshitaka Gushikem
Support Opportunities: Research Projects - Thematic Grants