Iron oxide and pyrocatechol: a spectroscopy study of the reaction products

Detalhes bibliográficos
Autor(a) principal: Barreto,Wagner José
Data de Publicação: 2006
Outros Autores: Barreto,Sônia Regina Giancoli, Moreira,Ivanira, Kawano,Yoshio
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000600021
Resumo: The reaction of 1,2-dihydroxy-benzene (pyrocatechol) (C6H6O2) with iron oxide (Fe2O3) and sodium thiosulfate (Na2S2O3) in aqueous medium (pH 7) was investigated. Pyrocatechol suffers autoxidation and coordinates with Fe3+ in solution. The presence of S2O3(2-) in solution was fundamental to generate and stabilize the pyrocatechol oxidation products as o-semiquinones. This compound was isolated and its structure characterized using FT-IR, EPR and UV-Vis Spectroscopy as [CTA][Fe(SQ)2(Cat)]. A thermal mass loss mechanism was proposed based on Thermogravimetric Analysis (TG) to support the structural characterization.
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spelling Iron oxide and pyrocatechol: a spectroscopy study of the reaction productspyrocatecholiron oxidesodium thiosulfateThe reaction of 1,2-dihydroxy-benzene (pyrocatechol) (C6H6O2) with iron oxide (Fe2O3) and sodium thiosulfate (Na2S2O3) in aqueous medium (pH 7) was investigated. Pyrocatechol suffers autoxidation and coordinates with Fe3+ in solution. The presence of S2O3(2-) in solution was fundamental to generate and stabilize the pyrocatechol oxidation products as o-semiquinones. This compound was isolated and its structure characterized using FT-IR, EPR and UV-Vis Spectroscopy as [CTA][Fe(SQ)2(Cat)]. A thermal mass loss mechanism was proposed based on Thermogravimetric Analysis (TG) to support the structural characterization.Sociedade Brasileira de Química2006-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000600021Química Nova v.29 n.6 2006reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40422006000600021info:eu-repo/semantics/openAccessBarreto,Wagner JoséBarreto,Sônia Regina GiancoliMoreira,IvaniraKawano,Yoshioeng2011-09-06T00:00:00Zoai:scielo:S0100-40422006000600021Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2011-09-06T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Iron oxide and pyrocatechol: a spectroscopy study of the reaction products
title Iron oxide and pyrocatechol: a spectroscopy study of the reaction products
spellingShingle Iron oxide and pyrocatechol: a spectroscopy study of the reaction products
Barreto,Wagner José
pyrocatechol
iron oxide
sodium thiosulfate
title_short Iron oxide and pyrocatechol: a spectroscopy study of the reaction products
title_full Iron oxide and pyrocatechol: a spectroscopy study of the reaction products
title_fullStr Iron oxide and pyrocatechol: a spectroscopy study of the reaction products
title_full_unstemmed Iron oxide and pyrocatechol: a spectroscopy study of the reaction products
title_sort Iron oxide and pyrocatechol: a spectroscopy study of the reaction products
author Barreto,Wagner José
author_facet Barreto,Wagner José
Barreto,Sônia Regina Giancoli
Moreira,Ivanira
Kawano,Yoshio
author_role author
author2 Barreto,Sônia Regina Giancoli
Moreira,Ivanira
Kawano,Yoshio
author2_role author
author
author
dc.contributor.author.fl_str_mv Barreto,Wagner José
Barreto,Sônia Regina Giancoli
Moreira,Ivanira
Kawano,Yoshio
dc.subject.por.fl_str_mv pyrocatechol
iron oxide
sodium thiosulfate
topic pyrocatechol
iron oxide
sodium thiosulfate
description The reaction of 1,2-dihydroxy-benzene (pyrocatechol) (C6H6O2) with iron oxide (Fe2O3) and sodium thiosulfate (Na2S2O3) in aqueous medium (pH 7) was investigated. Pyrocatechol suffers autoxidation and coordinates with Fe3+ in solution. The presence of S2O3(2-) in solution was fundamental to generate and stabilize the pyrocatechol oxidation products as o-semiquinones. This compound was isolated and its structure characterized using FT-IR, EPR and UV-Vis Spectroscopy as [CTA][Fe(SQ)2(Cat)]. A thermal mass loss mechanism was proposed based on Thermogravimetric Analysis (TG) to support the structural characterization.
publishDate 2006
dc.date.none.fl_str_mv 2006-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000600021
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000600021
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0100-40422006000600021
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Química Nova v.29 n.6 2006
reponame:Química Nova (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Química Nova (Online)
collection Química Nova (Online)
repository.name.fl_str_mv Química Nova (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv quimicanova@sbq.org.br
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