Reactivity of a Silsesquioxane Organofunctionalized with 4-Amino-5-Phenyl-4H-[1,2,4]-Triazole-3-thiol: Complementary Characterization and an Application to Chronoamperometric Detection of L-Dopamine

Autor(es)

Fernandes, Daniela Silvestrini ^[1] ; Maraldi, Vitor Alexandre ^[1] ; Dias Filho, Newton Luiz ^[2] ; do Carmo, Devaney R. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista Julio de Mesquita Filho UN, Dept Quim & Fis, Ave Brasil 56, BR-15385000 Ilha Solteira, SP - Brazil

^[2] Univ Estadual Paulista Julio de Mesquita Filho UN, Dept Engn Mecan, Ave Brasil 56, BR-15385000 Ilha Solteira, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: SILICON; v. 11, n. 2, p. 1131-1142, APR 2019.
• Citações Web of Science: 0

Resumo

This work describes the organofunctionalization and a complementary characterization and application of an octakis(3-chloropropyl)octasilsesquioxane (1) with 4-Amino-5-Phenyl-4H-{[}1,2,4]-Triazole-3-Thiol (2). The functionalized silsesquioxane (3) was characterized by nuclear magnetic resonance, X-ray diffraction, transmission electron microscopy and thermogravimetric analysis. After functionalized, the silsesquioxane can interact with copper chloride and subsequently with potassium hexacyanoferrate (III) (4). The hybrid composite formed (4) was characterized by FT-IR and diffuse reflectance. The compound 4 included into a work graphite paste electrode (20% w/w) was examined for chronoamperometric determination of L-Dopamine. The modified graphite paste electrode with compound 4 showed a linear response from 2.5 x 10(-5) at 4.0 x 10(-4) mol L-1. The modified graphite paste electrode with 4 showed a detection limit of 2.08 x 10(-4) mol L-1 with a relative standard deviation of +/- 2% (n = 3) and amperometric sensitivity of 0.136 A mol L-1. (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: 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