Silsesquioxane Modified with PAMAM Dendrimer and a Bimetallic Complex for Electrochemical Detection of Ascorbic Acid

Silsesquioxane Modified with PAMAM Dendrimer and a Bimetallic Complex for Electrochemical Detection of Ascorbic Acid

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...

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Bibliographic Details
Published in:Electroanalysis (New York, N.Y.) Vol. 33; no. 2; pp. 365 - 374
Main Authors: Silvestrini Fernandes, Daniela, Carmo, Devaney Ribeiro
Format: Journal Article
Language:English
Published: 01-02-2021
Subjects:
Ascorbic Acid
Organofunctionalization
PAMAM dendrimer
Silsesquioxane
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Summary: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 Eθ′= 0.27 and 0.74 V, that are assigned to the CuI/CuII and FeII(CN)6/FeIII(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.
ISSN:1040-0397
1521-4109
DOI:10.1002/elan.202060228