Electrosynthesis and electrochemical characterisation of phenazine polymers for application in biosensors
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/5017 https://doi.org/10.1016/j.electacta.2007.10.012 |
Resumo: | A comparative investigation has been undertaken of the electrosynthesis and electrochemical properties of three different electroactive polymers on carbon film electrode substrates: poly(neutral red) from the phenazine dye neutral red, and poly(methylene green) and poly(methylene blue), from the corresponding phenothiazine dyes. The formation of the radical cation at different potentials and the chemical structures of the monomers both influence the electropolymerisation process of the three polyaromatic dyes. Of the three, poly(neutral red) is shown to have the best adhesion at carbon film electrodes. The influence of the electrolyte and pH on film growth and on electrochemical properties was investigated. The formal potential decreased linearly with increase in pH, in the pH range from 1 to 7 for all three polymers. The modified electrodes were also characterised by electrochemical impedance spectroscopy. The bulk and interfacial characteristics of the two phenothiazine polymers were similar and oxygen-dependent, but different to those of the phenazine polymer, poly(neutral red), which were not significantly influenced by the presence of oxygen in solution. Perspectives for use in electrochemical biosensors are indicated. |
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Electrosynthesis and electrochemical characterisation of phenazine polymers for application in biosensorsPoly(neutral red)Poly(methylene green)Poly(methylene blue)ElectropolymerisationElectroactive polymersA comparative investigation has been undertaken of the electrosynthesis and electrochemical properties of three different electroactive polymers on carbon film electrode substrates: poly(neutral red) from the phenazine dye neutral red, and poly(methylene green) and poly(methylene blue), from the corresponding phenothiazine dyes. The formation of the radical cation at different potentials and the chemical structures of the monomers both influence the electropolymerisation process of the three polyaromatic dyes. Of the three, poly(neutral red) is shown to have the best adhesion at carbon film electrodes. The influence of the electrolyte and pH on film growth and on electrochemical properties was investigated. The formal potential decreased linearly with increase in pH, in the pH range from 1 to 7 for all three polymers. The modified electrodes were also characterised by electrochemical impedance spectroscopy. The bulk and interfacial characteristics of the two phenothiazine polymers were similar and oxygen-dependent, but different to those of the phenazine polymer, poly(neutral red), which were not significantly influenced by the presence of oxygen in solution. Perspectives for use in electrochemical biosensors are indicated.http://www.sciencedirect.com/science/article/B6TG0-4PWF0V7-2/1/e941cc45a7e6b84b17de569da173901b2008info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleaplication/PDFhttp://hdl.handle.net/10316/5017http://hdl.handle.net/10316/5017https://doi.org/10.1016/j.electacta.2007.10.012engElectrochimica Acta. 53:11 (2008) 3973-3982Barsan, Madalina M.Pinto, Edilson M.Brett, Christopher M. A.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2020-11-06T16:49:01Zoai:estudogeral.uc.pt:10316/5017Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:01:40.806135Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Electrosynthesis and electrochemical characterisation of phenazine polymers for application in biosensors |
title |
Electrosynthesis and electrochemical characterisation of phenazine polymers for application in biosensors |
spellingShingle |
Electrosynthesis and electrochemical characterisation of phenazine polymers for application in biosensors Barsan, Madalina M. Poly(neutral red) Poly(methylene green) Poly(methylene blue) Electropolymerisation Electroactive polymers |
title_short |
Electrosynthesis and electrochemical characterisation of phenazine polymers for application in biosensors |
title_full |
Electrosynthesis and electrochemical characterisation of phenazine polymers for application in biosensors |
title_fullStr |
Electrosynthesis and electrochemical characterisation of phenazine polymers for application in biosensors |
title_full_unstemmed |
Electrosynthesis and electrochemical characterisation of phenazine polymers for application in biosensors |
title_sort |
Electrosynthesis and electrochemical characterisation of phenazine polymers for application in biosensors |
author |
Barsan, Madalina M. |
author_facet |
Barsan, Madalina M. Pinto, Edilson M. Brett, Christopher M. A. |
author_role |
author |
author2 |
Pinto, Edilson M. Brett, Christopher M. A. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Barsan, Madalina M. Pinto, Edilson M. Brett, Christopher M. A. |
dc.subject.por.fl_str_mv |
Poly(neutral red) Poly(methylene green) Poly(methylene blue) Electropolymerisation Electroactive polymers |
topic |
Poly(neutral red) Poly(methylene green) Poly(methylene blue) Electropolymerisation Electroactive polymers |
description |
A comparative investigation has been undertaken of the electrosynthesis and electrochemical properties of three different electroactive polymers on carbon film electrode substrates: poly(neutral red) from the phenazine dye neutral red, and poly(methylene green) and poly(methylene blue), from the corresponding phenothiazine dyes. The formation of the radical cation at different potentials and the chemical structures of the monomers both influence the electropolymerisation process of the three polyaromatic dyes. Of the three, poly(neutral red) is shown to have the best adhesion at carbon film electrodes. The influence of the electrolyte and pH on film growth and on electrochemical properties was investigated. The formal potential decreased linearly with increase in pH, in the pH range from 1 to 7 for all three polymers. The modified electrodes were also characterised by electrochemical impedance spectroscopy. The bulk and interfacial characteristics of the two phenothiazine polymers were similar and oxygen-dependent, but different to those of the phenazine polymer, poly(neutral red), which were not significantly influenced by the presence of oxygen in solution. Perspectives for use in electrochemical biosensors are indicated. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10316/5017 http://hdl.handle.net/10316/5017 https://doi.org/10.1016/j.electacta.2007.10.012 |
url |
http://hdl.handle.net/10316/5017 https://doi.org/10.1016/j.electacta.2007.10.012 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Electrochimica Acta. 53:11 (2008) 3973-3982 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
aplication/PDF |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799133907452428288 |