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Silsesquioxane Modified with PAMAM Dendrimer and a Bimetallic Complex for Electrochemical Detection of Ascorbic Acid
Author(s) -
Silvestrini Fernandes Daniela,
Carmo Devaney Ribeiro
Publication year - 2021
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.202060228
Subject(s) - silsesquioxane , cyclic voltammetry , differential pulse voltammetry , ascorbic acid , chronoamperometry , dendrimer , chemistry , fourier transform infrared spectroscopy , redox , nuclear chemistry , electrochemistry , inorganic chemistry , polymer chemistry , electrode , organic chemistry , chemical engineering , engineering , polymer , food science
Octakis(3‐chloropropyl)octasilsesquioxane (S) was organofunctionalized with the PAMAM Dendrimer G.0 (SPD). After functionalization, silsesquioxane interacts with copper chloride and subsequently with potassium hexacyanoferrate (III) to produce the structure CuHSPD. The silsesquioxane functionalized with the PAMAM dendrimer (SPD) and the obtained novel hybrid composite (CuHSPD) were characterized by Fourier transform infrared spectroscopy (FT‐IR), scanning electron microscopy (SEM), and energy dispersive X‐ray spectroscopy (EDS). The CuHSP voltammogram showed two well‐defined redox pairs with E θ′ = 0.27 and 0.74 V, that are assigned to the Cu I /Cu II and Fe II (CN) 6 /Fe III (CN) 6 redox pairs, respectively. The graphite paste electrode containing CuHSPD allowed the electrocatalytic determination of ascorbic acid using various electrochemical techniques such as cyclic voltammetry, differential pulse voltammetry, and chronoamperometry.