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Synergistic Exploitation of the Superoxide Scavenger Properties of Reduced Graphene Oxide and a Trityl Organic Radical for the Impedimetric Sensing of Xanthine

AutorSeber, Gonca ; Muñoz Martín, José M. ; Sandoval, Stefania ; Rovira, Concepció ; Tobias, Gerard ; Mas Torrent, Marta ; Crivillers, Núria
Palabras claveReduced graphene oxide
Superoxide anion radical
Trityl radical
Xanthine sensor
Fecha de publicación23-ene-2018
EditorWiley-VCH
CitaciónAdvanced Materials Interfaces 5(2): 1701072 (2018)
ResumenThis work is based on synergetically exploiting the activity of graphene-based materials and trityl free radicals to sense xanthine (X) by their combined scavenging properties for superoxide anion radical (O2•−). For this, reduced graphene oxide (rGO) and rGO covalently functionalized with a perchlorotriphenylmethyl (PTM) radical derivative (rGO@PTM) are synthesized, characterized, and casted on an electrode surface to achieve a highly sensitive electrochemical recognition platform for xanthine determination. The electrochemical analysis is based on impedimetrically monitoring a radical-involved reaction on the graphene-based electrode surface after reacting with such O2•− derived from the xanthine/xanthine oxidase enzymatic system. The presented strategy yields to determine X at nm levels, decreasing the detection limit 100 times with respect to previously reported (bio)sensors.
Versión del editorhttp://dx.doi.org/10.1002/admi.201701072
URIhttp://hdl.handle.net/10261/161757
ISSN2196-7350
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