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Type: Artigo de periódico
Title: Electroactive Properties of 1-propyl-3-methylimidazolium Ionic Liquid Covalently Bonded on Mesoporous Silica Surface: Development of an Electrochemical Sensor Probed for NADH, Dopamine and Uric Acid Detection
Author: Maroneze, CM
Rahim, A
Fattori, N
da Costa, LP
Sigoli, FA
Mazali, IO
Custodio, R
Gushikem, Y
Abstract: A hybrid organic-inorganic porous material was successfully prepared through chemical modification of a non-ordered mesoporous silica, obtained by the sol-gel process, with 1-propyl-3-methylimidazolium groups. The porous material was evaluated as a platform for the development of electrochemical sensors, here probed toward the electrooxidation of NADH (beta-nicotinamide adenine dinucleotide), uric acid (UA) and dopamine (DA). The presence of cationic imidazolium groups on the surface of the hybrid silica-based material allowed the electrochemical detection of these biomolecules without any other electron mediator or biomolecular recognition component. Such behavior highlights the potentiality of this material to be applied in the development of new electrochemical sensing devices. Theoretical calculations based on density functional theory emphasizes that the cationic character of imidazolium group provides better oxidation conditions if the solvent effect is minimized. (C) 2014 Elsevier Ltd. All rights reserved.
Subject: 1-propyl-3-methylimidazolium
mesoporous silica
electrochemical sensors
Uric acid
Country: Inglaterra
Editor: Pergamon-elsevier Science Ltd
Citation: Electrochimica Acta. Pergamon-elsevier Science Ltd, v. 123, n. 435, n. 440, 2014.
Rights: fechado
Identifier DOI: 10.1016/j.electacta.2014.01.071
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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