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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
| Content Provider | Scilit |
|---|---|
| Author | Ramos, André R. Arguello, Jacqueline Magosso, Hérica A. Gushikem, Yoshitaka |
| Copyright Year | 2008 |
| Description | 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.Um 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 |
| Related Links | http://www.scielo.br/pdf/jbchs/v19n4/a20v19n4.pdf http://www.scielo.br/scielo.php?script=sci_pdf&pid=S0103-50532008000400020&lng=en&nrm=iso&tlng=en |
| Ending Page | 761 |
| Page Count | 7 |
| Starting Page | 755 |
| ISSN | 01035053 |
| e-ISSN | 16784790 |
| DOI | 10.1590/s0103-50532008000400020 |
| Journal | Journal of the Brazilian Chemical Society |
| Issue Number | 4 |
| Volume Number | 19 |
| Language | English |
| Publisher | FapUNIFESP (SciELO) |
| Publisher Date | 2008-01-01 |
| Access Restriction | Open |
| Subject Keyword | Journal of the Brazilian Chemical Society azabicyclo[2.2.2]octanesilsesquioxane Chloride Cobalt(ii) Tetrasulfonated Phthalocyanine Oxalic Acid Electrocatalytic Oxidation |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry |
