Volume 2, Issue 5, September 2013, Page: 146-156
Influence of Natural Polysaccharides on the Redox Processes of CuTsPc Thin Films and Dopamine Sensing
Silio Lima de Moura, Bioelectrochemistry Laboratory, Federal University of Piauí, Teresina 64 049 550, Brazil; Electrodeposition and Corrosion Laboratory, University of Barcelona, Barcelona 08 028, Spain; Sensors and Biosensors Group, Autonomous University of Barcelona, Bellaterra 08 193, Spain
Carlos Maria Müller Jevenois, Electrodeposition and Corrosion Laboratory, University of Barcelona, Barcelona 08 028, Spain
Maria Isabel Pividori, Sensors and Biosensors Group, Autonomous University of Barcelona, Bellaterra 08 193, Spain
José Aroldo Viana dos Santos, Bioelectrochemistry Laboratory, Federal University of Piauí, Teresina 64 049 550, Brazil
Valtencir Zucolotto, Nanomedicine and Nanotoxicology Laboratory, University of São Paulo, São Carlos 13 560 970, Brazil
Ionara Nayana Gomes Passos, Bioelectrochemistry Laboratory, Federal University of Piauí, Teresina 64 049 550, Brazil
José Ribeiro dos Santos Júnior, Bioelectrochemistry Laboratory, Federal University of Piauí, Teresina 64 049 550, Brazil
Received: Aug. 8, 2013;       Published: Aug. 30, 2013
DOI: 10.11648/j.ijmsa.20130205.11      View  3060      Downloads  192
Abstract
Energy diagrams have been obtained for copper tetrasulfonated phthalocyanine (CuTsPc) from electrochemical and electronic absorption measurements in layer-by-layer (LbL) films with cashew (Anacardium occidentale L.) and angico branco (Anadenanthera colubrina) natural polysaccharides in the anionic layers. In this study, LbL films were produced with either copper tetrasulfonated phthalocyanine or polysaccharides (cashew or angico branco). Since CuTsPc and the gums are polyanions, the multilayer deposition was carried out in a tetralayer fashion, in which a conventional cationic polyelectrolyte, namely poly (allylamine hydrochloride) (PAH), was interposed between the polyanionic layers. An alternative for the simultaneous determination of electrochemical signals was using the deconvolution procedure. Mathematical deconvolution of the peaks followed Gaussian analysis. The presence of the gum led to increased adsorption of the phthalocyanine, and enhanced the UV-VIS absorption and electrochemical response of the films. Furthermore, modified electrodes based on polysaccharides/phthalocyanine films were able to detect dopamine at concentrations as low as 10-5mol/L.
Keywords
Natural Polymers, Copper Phthalocyanine, LbL Films, Mathematical Deconvolution, Dopamine
To cite this article
Silio Lima de Moura, Carlos Maria Müller Jevenois, Maria Isabel Pividori, José Aroldo Viana dos Santos, Valtencir Zucolotto, Ionara Nayana Gomes Passos, José Ribeiro dos Santos Júnior, Influence of Natural Polysaccharides on the Redox Processes of CuTsPc Thin Films and Dopamine Sensing, International Journal of Materials Science and Applications. Vol. 2, No. 5, 2013, pp. 146-156. doi: 10.11648/j.ijmsa.20130205.11
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