Phenol And Para-Substituted Phenols Electrochemical Oxidation Pathways
Autor(a) principal: | |
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Data de Publicação: | 2011 |
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/10316/20137 https://doi.org/10.1016/j.jelechem.2011.02.022 |
Resumo: | The electrochemical behaviour of phenol, catechol, hydroquinone, resorcinol, dopamine, and para-substituted phenolic compounds, 4-ethylphenol, tyrosine, and tyramine, was studied over a wide pH range using a glassy carbon electrode. The oxidation of phenol is pH dependent and irreversible, occurring in one step, and followed by hydrolyse in ortho- and para- positions, leading to two oxidation products, catechol and hydroquinone. The oxidation of phenol oxidation products, ortho-phenol and para-phenol, is reversible and pH dependent. The oxidation potential of parasubstituted phenols varies slightly due to their substituent group in position C4, and occurs in one oxidation step corresponding to the oxidation of phenol. The oxidation products of this group of para-substituted phenols are reversibly oxidised and adsorb on the electrode surface. |
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Phenol And Para-Substituted Phenols Electrochemical Oxidation PathwaysPhenolPara-substituted phenolsVoltammetryOxidationGlassy carbonThe electrochemical behaviour of phenol, catechol, hydroquinone, resorcinol, dopamine, and para-substituted phenolic compounds, 4-ethylphenol, tyrosine, and tyramine, was studied over a wide pH range using a glassy carbon electrode. The oxidation of phenol is pH dependent and irreversible, occurring in one step, and followed by hydrolyse in ortho- and para- positions, leading to two oxidation products, catechol and hydroquinone. The oxidation of phenol oxidation products, ortho-phenol and para-phenol, is reversible and pH dependent. The oxidation potential of parasubstituted phenols varies slightly due to their substituent group in position C4, and occurs in one oxidation step corresponding to the oxidation of phenol. The oxidation products of this group of para-substituted phenols are reversibly oxidised and adsorb on the electrode surface.Elsevier2011info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/20137http://hdl.handle.net/10316/20137https://doi.org/10.1016/j.jelechem.2011.02.022engENACHE, Adrian Enache; OLIVEIRA-BRETT, Ana Maria - Phenol and para-substituted phenols electrochemical oxidation pathways. "Journal of Electroanalytical Chemistry". ISSN 1572-6657. 655:1 (2011) 9-161572-6657http://www.sciencedirect.com/science/journal/15726657Enache, Teodor AdrianBrett, Ana Maria Oliveirainfo: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:RCAAP2020-05-25T13:17:28Zoai:estudogeral.uc.pt:10316/20137Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:01:47.849660Repositório 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 |
Phenol And Para-Substituted Phenols Electrochemical Oxidation Pathways |
title |
Phenol And Para-Substituted Phenols Electrochemical Oxidation Pathways |
spellingShingle |
Phenol And Para-Substituted Phenols Electrochemical Oxidation Pathways Enache, Teodor Adrian Phenol Para-substituted phenols Voltammetry Oxidation Glassy carbon |
title_short |
Phenol And Para-Substituted Phenols Electrochemical Oxidation Pathways |
title_full |
Phenol And Para-Substituted Phenols Electrochemical Oxidation Pathways |
title_fullStr |
Phenol And Para-Substituted Phenols Electrochemical Oxidation Pathways |
title_full_unstemmed |
Phenol And Para-Substituted Phenols Electrochemical Oxidation Pathways |
title_sort |
Phenol And Para-Substituted Phenols Electrochemical Oxidation Pathways |
author |
Enache, Teodor Adrian |
author_facet |
Enache, Teodor Adrian Brett, Ana Maria Oliveira |
author_role |
author |
author2 |
Brett, Ana Maria Oliveira |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Enache, Teodor Adrian Brett, Ana Maria Oliveira |
dc.subject.por.fl_str_mv |
Phenol Para-substituted phenols Voltammetry Oxidation Glassy carbon |
topic |
Phenol Para-substituted phenols Voltammetry Oxidation Glassy carbon |
description |
The electrochemical behaviour of phenol, catechol, hydroquinone, resorcinol, dopamine, and para-substituted phenolic compounds, 4-ethylphenol, tyrosine, and tyramine, was studied over a wide pH range using a glassy carbon electrode. The oxidation of phenol is pH dependent and irreversible, occurring in one step, and followed by hydrolyse in ortho- and para- positions, leading to two oxidation products, catechol and hydroquinone. The oxidation of phenol oxidation products, ortho-phenol and para-phenol, is reversible and pH dependent. The oxidation potential of parasubstituted phenols varies slightly due to their substituent group in position C4, and occurs in one oxidation step corresponding to the oxidation of phenol. The oxidation products of this group of para-substituted phenols are reversibly oxidised and adsorb on the electrode surface. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011 |
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/10316/20137 http://hdl.handle.net/10316/20137 https://doi.org/10.1016/j.jelechem.2011.02.022 |
url |
http://hdl.handle.net/10316/20137 https://doi.org/10.1016/j.jelechem.2011.02.022 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
ENACHE, Adrian Enache; OLIVEIRA-BRETT, Ana Maria - Phenol and para-substituted phenols electrochemical oxidation pathways. "Journal of Electroanalytical Chemistry". ISSN 1572-6657. 655:1 (2011) 9-16 1572-6657 http://www.sciencedirect.com/science/journal/15726657 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
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 |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
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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