Synthesis, characterization and electrochemical properties of 5-aza[5]helicene-CH2O-CO-MWCNTs nanocomposite
| Autor: | Salvatore Leonardi, Francesca Fontana, Daniela Iannazzo, Giovanni Neri, Federica Melone |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
azahelicenes Analytical chemistry nanotubi di carbonio Bioengineering 02 engineering and technology 010402 general chemistry 01 natural sciences chemistry.chemical_compound azaeliceni Moiety General Materials Science epinephrine Electrical and Electronic Engineering 5-aza[5]helicene electrochemical sensing multi-walled carbon nanotubes sensori elettrochimici 5-aza[5]helicene nanocomposite carbon nanotubes electrochemical sensors epinephrine Nanocomposite carbon nanotubes nanocomposite Hydroquinone electrochemical sensors Mechanical Engineering Settore CHIM/07 - Fondamenti Chimici delle Tecnologie General Chemistry Buffer solution 021001 nanoscience & nanotechnology Ascorbic acid 0104 chemical sciences Thermogravimetry epinefrina chemistry Mechanics of Materials Linear sweep voltammetry Ferricyanide 0210 nano-technology Nuclear chemistry |
| Zdroj: | Nanotechnology. 28:135501 |
| ISSN: | 1361-6528 0957-4484 |
| DOI: | 10.1088/1361-6528/aa5e80 |
| Popis: | In this study, we report the preparation of a novel nanocomposite, 5-aza[5]helicene-CH2O-CO-MWCNTs, obtained by grafting the 5-aza[5]helicene moiety on the surface of multi-walled carbon nanotubes (MWCNTs). Thermogravimetry (TGA), Fourier transform-infrared spectroscopy (FTIR), ultraviolet (UV), and photoluminescence (PL) measurements provided evidence that the organic moiety is covalently grafted to the MWCNTs. The 5-aza[5]helicene-CH2O-CO-MWCNTs nanocomposite was utilized to fabricate modified commercial screen-printed carbon electrodes. Its electrochemical behavior was studied in neutral buffer solution in the presence of ferricyanide and hydroquinone (HQ). Finally, the electrochemical sensing of epinephrine in the presence of ascorbic acid by using the linear sweep voltammetry (LSV) technique was investigated. Results have demonstrated the enhanced electrocatalytic activity and excellent ability of the 5-aza[5]helicene-CH2O-CO-MWCNTs-modified electrode in the separation between the anodic peaks of epinephrine (EP) and ascorbic acid (AA), even in the presence of a high amount of AA, with a detection limit (S/N = 3) of 5 μmol l−1. |
| Databáze: | OpenAIRE |
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