Effect of the medium composition on the current of steady state voltammograms of neutral and charged species in dimethylformamide/toluene mixtures
Autor(a) principal: | |
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Data de Publicação: | 1999 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | https://hdl.handle.net/1822/2232 |
Resumo: | Steady state voltammetric currents of both neutral and charged species obtained at microelectrodes are affected by the medium composition. Experiments carried out in N,N-dimethylformamide (DMF) and toluene/DMF mixtures for the reduction of diciano(fluoren-9-ylidene)methane and the methylviologen cation and for the oxidation of ferrocene, in the presence of different electrolyte concentrations indicate that both viscosity of the solution and mass transport by migration may have a strong effect on the measured limiting currents. These observations are particularly important in electroanalysis since the appropriate choice of the medium may substantially improve both the sensitivity and the detection limits of the electrochemical method. |
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Effect of the medium composition on the current of steady state voltammograms of neutral and charged species in dimethylformamide/toluene mixturesMicroelectrodesDiffusion coefficientViscosityMigrationScience & TechnologySteady state voltammetric currents of both neutral and charged species obtained at microelectrodes are affected by the medium composition. Experiments carried out in N,N-dimethylformamide (DMF) and toluene/DMF mixtures for the reduction of diciano(fluoren-9-ylidene)methane and the methylviologen cation and for the oxidation of ferrocene, in the presence of different electrolyte concentrations indicate that both viscosity of the solution and mass transport by migration may have a strong effect on the measured limiting currents. These observations are particularly important in electroanalysis since the appropriate choice of the medium may substantially improve both the sensitivity and the detection limits of the electrochemical method.This work has been supported by PRAXIS Programme / FEDER (Project PRAXIS/2/2.1/QUI/260/94.ElsevierUniversidade do MinhoBento, M. FátimaGeraldo, M. DulceMontenegro, M. I.1999-041999-04-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/2232engBento, M. F., Geraldo, M. D., & Montenegro, M. I. (1999). Effect of the medium composition on the current of steady state voltammograms of neutral and charged species in dimethylformamide/toluene mixtures. Analytica Chimica Acta, 385(1), 365-371. doi: https://doi.org/10.1016/S0003-2670(98)00698-90003-267010.1016/S0003-2670(98)00698-9info: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:RCAAP2023-07-21T12:42:54Zoai:repositorium.sdum.uminho.pt:1822/2232Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:40:15.144132Repositório 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 |
Effect of the medium composition on the current of steady state voltammograms of neutral and charged species in dimethylformamide/toluene mixtures |
title |
Effect of the medium composition on the current of steady state voltammograms of neutral and charged species in dimethylformamide/toluene mixtures |
spellingShingle |
Effect of the medium composition on the current of steady state voltammograms of neutral and charged species in dimethylformamide/toluene mixtures Bento, M. Fátima Microelectrodes Diffusion coefficient Viscosity Migration Science & Technology |
title_short |
Effect of the medium composition on the current of steady state voltammograms of neutral and charged species in dimethylformamide/toluene mixtures |
title_full |
Effect of the medium composition on the current of steady state voltammograms of neutral and charged species in dimethylformamide/toluene mixtures |
title_fullStr |
Effect of the medium composition on the current of steady state voltammograms of neutral and charged species in dimethylformamide/toluene mixtures |
title_full_unstemmed |
Effect of the medium composition on the current of steady state voltammograms of neutral and charged species in dimethylformamide/toluene mixtures |
title_sort |
Effect of the medium composition on the current of steady state voltammograms of neutral and charged species in dimethylformamide/toluene mixtures |
author |
Bento, M. Fátima |
author_facet |
Bento, M. Fátima Geraldo, M. Dulce Montenegro, M. I. |
author_role |
author |
author2 |
Geraldo, M. Dulce Montenegro, M. I. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Bento, M. Fátima Geraldo, M. Dulce Montenegro, M. I. |
dc.subject.por.fl_str_mv |
Microelectrodes Diffusion coefficient Viscosity Migration Science & Technology |
topic |
Microelectrodes Diffusion coefficient Viscosity Migration Science & Technology |
description |
Steady state voltammetric currents of both neutral and charged species obtained at microelectrodes are affected by the medium composition. Experiments carried out in N,N-dimethylformamide (DMF) and toluene/DMF mixtures for the reduction of diciano(fluoren-9-ylidene)methane and the methylviologen cation and for the oxidation of ferrocene, in the presence of different electrolyte concentrations indicate that both viscosity of the solution and mass transport by migration may have a strong effect on the measured limiting currents. These observations are particularly important in electroanalysis since the appropriate choice of the medium may substantially improve both the sensitivity and the detection limits of the electrochemical method. |
publishDate |
1999 |
dc.date.none.fl_str_mv |
1999-04 1999-04-01T00:00:00Z |
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 |
https://hdl.handle.net/1822/2232 |
url |
https://hdl.handle.net/1822/2232 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Bento, M. F., Geraldo, M. D., & Montenegro, M. I. (1999). Effect of the medium composition on the current of steady state voltammograms of neutral and charged species in dimethylformamide/toluene mixtures. Analytica Chimica Acta, 385(1), 365-371. doi: https://doi.org/10.1016/S0003-2670(98)00698-9 0003-2670 10.1016/S0003-2670(98)00698-9 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
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 |
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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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1799132947464323072 |