A Silsesquioxane Organically Modified with 4-Amino-5-(4-pyridyl)-4H-1,2,4-triazole-3-thiol: Thermal Behavior and Its Electrochemical Detection of Sulfhydryl Compounds
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
03/12/2014
03/12/2014
01/01/2014
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Resumo |
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Processo FAPESP: 12/05438-1 Processo FAPESP: 03/12882-6 Processo FAPESP: 12/11306-0 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. |
Formato |
11 |
Identificador |
http://dx.doi.org/10.1155/2014/695954 Journal Of Nanomaterials. New York: Hindawi Publishing Corporation, 11 p., 2014. 1687-4110 http://hdl.handle.net/11449/113653 10.1155/2014/695954 WOS:000339234200001 WOS000339234200001.pdf |
Idioma(s) |
eng |
Publicador |
Hindawi Publishing Corporation |
Relação |
Journal of Nanomaterials |
Direitos |
openAccess |
Tipo |
info:eu-repo/semantics/article |