Synthesis of a novel hybrid nanocomposite based on copper pentacyanonitrosylferrate and octa(aminopropyl)silsesquioxane and its behavior on L-cysteine electrooxidation
In this study, a novel silsesquioxane and copper pentacyanonitrosylferrate compound was prepared starting from octa(aminopropyl)silsesquioxane (CA) following a new synthesis route. The prepared composite (ACCuN) was characterized by spectroscopic techniques, such infrared (FTIR), Scanning Electron M...
| Autores: | , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2019 |
| País: | Brasil |
| Recursos: | Universidade Estadual Paulista (UNESP) |
| Repositorio: | Repositório Institucional da UNESP |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.unesp.br:11449/187844 |
| Acesso em linha: | http://dx.doi.org/10.1016/j.solidstatesciences.2019.105931 http://hdl.handle.net/11449/187844 |
| Access Level: | acceso abierto |
| Palavra-chave: | Chemical synthesis Electrochemical properties L-cysteine octa(aminopropyl)silsesquioxane Spectroscopic methods |
| Resumo: | In this study, a novel silsesquioxane and copper pentacyanonitrosylferrate compound was prepared starting from octa(aminopropyl)silsesquioxane (CA) following a new synthesis route. The prepared composite (ACCuN) was characterized by spectroscopic techniques, such infrared (FTIR), Scanning Electron Microscopy coupled with Energy X-Ray (SEM-EDS), Transmission Electron Microscopy (TEM), X-ray Diffraction (XRD), Diffuse Reflectance UV/Vis, Electronic Paramagnetic Resonance (EPR) and cyclic voltammetry (CV). The cyclic voltammograms of the modified graphite paste electrode with ACCuN presented a redox pair with a formal potential of (Eθ') = 0.73 V (vs Ag/AgCl(sat.)) assigned to the redox couple Fe(II)(CN)5NO/Fe(III)(CN)5NO, respectively (vs Ag/AgCl(sat.); KCl 1.0 mol L−1; pH = 7.0; v = 20 mV s−1). The nanocomposite ACCuN was sensitive to L-cysteine concentrations, with a linear response from 2.0 × 10−4 to 2.0 × 10−3 mol L−1, relative standard deviation of ±2% (n = 3), and limit of detection and amperometric sensitivity of 1.25 × 10−4 mol L−1 and 10.66 mA/mol L−1, respectively. |
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