| Texto completo | |
| Autor(es): |
Do Carmo, D. R.
;
Silvestrini, D. R.
;
Barud, H. S.
;
Filho, N. L. Dias
;
Bicalho, U. O.
;
Soares, L. A.
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Nanomaterials; v. 2014, p. 11-pg., 2014-01-01. |
| Resumo | |
The octakis(3-chloropropyl)silsesquioxane (SS) was organofunctionalized with 4-amino-5- 4(pyridyl)-4H-1,2,4-triazole-3-thiol. The product formed (SA) was undergo another reactions in two steps, first with copper and so hexacyanoferrate (III) to form CuHSA. The organofunctionalized silsesquioxane was characterized by the following techniques: scanning electron microscopy (SEM), Fourier transform infrared (FTIR), nuclear magnetic resonance (NMR) in solid state, and thermogravimetric analysis in air and nitrogen atmosphere. The composite CuHSA was incorporated into a graphite paste electrode and the electrochemical behavior studies were conducted with cyclic voltammetry. The cyclic voltammogram of the modified graphite paste electrode with CuHSA showed one redox couple with formal potential E-theta' = 0.75V versus Ag/AgCl(sat) (KCl 1.0 mol L-1; v = 20 mV s(-1)) attributed to the redox process Fe-(II) (CN)(6)/Fe-(III)(CN)(6) of the binuclear complex formed. The redox couple presents an electrocatalytic response of sulfhydryl compounds such as n-acetylcysteine and l-cysteine. For determination of n-acetylcysteine and l-cysteine the modified graphite paste electrode showed a linear region in the concentration range of 2 to 20 m mol L-1. The modified electrode was chemically and electrochemically stable and showed good reproducibility. (AU) | |
| Processo FAPESP: | 12/05438-1 - Desenvolvimento de novos silsesquioxanos nanoestruturados híbridos organofuncionalizados: preparação, caracterização e suas aplicações como sensores de compostos e íons de interesse ambiental e biológico |
| Beneficiário: | Devaney Ribeiro Do Carmo |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 03/12882-6 - Dendrímeros de silsesquioxanos e octaamino poli(propileno) imina modificados com triclorotriazina: síntese, caracterização e aplicações |
| Beneficiário: | Devaney Ribeiro Do Carmo |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores |
| Processo FAPESP: | 12/11306-0 - Quantificação eletroquímica de analitos de interesse ambiental e biológico, empregando novos materiais preparados a partir de silsesquioxanos funcionalizados. |
| Beneficiário: | Daniela Silvestrini Fernandes |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |