Biblioteca Digital do Instituto Politécnico de Bragança   Instituto Politécnico de Bragança

Biblioteca Digital do IPB >
Escola Superior Agrária >
Biologia e Biotecnologia >
BB - Artigos em Revistas Indexados ao ISI/Scopus >

Please use this identifier to cite or link to this item:

Título: Insights in the antioxidant activity of diarylamines from the 2,3-dimethylbenzo[b]thiophene through the redox profile
Autor: Abreu, Rui M.V.
Falcão, Soraia
Ferreira, Isabel C.F.R.
Queiroz, Maria João R.P.
Vilas-Boas, Miguel
Palavras-chave: Benzo[b]thiophene
Antioxidant properties
Electrochemical assays
Issue Date: 2009
Editora: Elsevier
Citação: Abreu, Rui M.V.; Falcão, Soraia; Ferreira, Isabel C.F.R.; Queiroz, Maria João R.P.; Vilas-Boas, Miguel (2009) - Insights in the antioxidant activity of diarylamines from the 2,3-dimethylbenzo[b]thiophene through the redox profile. Journal of Electroanalytical Chemistry. ISSN 1572-6657. 628:1-2, p. 43-47
Relatório da Série N.º: 628;
Resumo: Cyclic voltammetry was used to evaluate the antioxidant activity of 7-aryl or 7-heteroarylamino-2,3-dimethylbenzo[b]thiophenes previously synthesized by some of us, comparing their oxidation potentials with those of the well-known synthetic standards (BHA, BHT). Compounds with electron-donating groups on the arylamine moiety have lower Ep/2 than compounds with electron-withdrawing groups or electron-deficient rings (pyridines). The position of the methoxy group on the arylamine moiety also changes the oxidation potential: lower Ep/2 for the diarylamines with methoxy groups in the para position. Comparing the first peak potential with the ones of BHA and BHT, the diarylamine compounds show lower oxidation potential, and therefore higher reducing power. A reasonable inverse correlation was also observed between the Ep/2 values and the pEC50 values obtained in antioxidant activity chemical assays. It can be generalized that compounds with lower Ep/2 values have better antioxidant activity (DPPH assay) and higher reducing power.
ISSN: 1572-6657
Versão do Editor:
Appears in Collections:BB - Artigos em Revistas Indexados ao ISI/Scopus

Files in This Item:

File Description SizeFormat
diaril_electro_revised_January.pdf182,04 kBAdobe PDFView/Open
Insights in the antioxidant .pdf578,31 kBAdobe PDFView/Open

Please give feedback about this item
FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Logotipo do DeGóis 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


© Instituto Politécnico de Bragança - Biblioteca Digital - Feedback - Statistics
Promotores do RCAAP   Financiadores do RCAAP

Fundação para a Ciência e a Tecnologia Universidade do Minho   Governo Português Ministério da Educação e Ciência PO Sociedade do Conhecimento (POSC) Portal oficial da União Europeia