Dansyl-based fluorescent films prepared by chemical and electrochemical methods: cyclic voltammetry, afm and spectrofluorimetry characterization
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of the Brazilian Chemical Society (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532011000900025 |
Resumo: | Dansyl-based fluorescent films were prepared by two different methods. In one of them, the surface of an indium tin oxide (ITO) electrode was coated with a film of chitosan and the polymer subsequently derivatized with dansyl chloride, whilst in the second method a film of dansylglycine was electrochemically deposited on the ITO surface. Atomic force microscopy (AFM) was employed to map the surfaces of the films. Comparison of the morphological, photochemical and electrochemical properties of these films indicated that the dansylglycine film electrodeposited on ITO exhibited electrochemical response, emitted a higher level of fluorescence, presented greater surface roughness and larger relative surface area in comparison with its dansyl chloride-chitosan counterpart. This behavior can be attributed to the higher number of active sites present in the well-organized and rough structure of the electrodeposited film in comparison with the chemically produced films |
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Journal of the Brazilian Chemical Society (Online) |
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Dansyl-based fluorescent films prepared by chemical and electrochemical methods: cyclic voltammetry, afm and spectrofluorimetry characterizationfluorescent filmschitosandansyl derivativesatomic force microscopyDansyl-based fluorescent films were prepared by two different methods. In one of them, the surface of an indium tin oxide (ITO) electrode was coated with a film of chitosan and the polymer subsequently derivatized with dansyl chloride, whilst in the second method a film of dansylglycine was electrochemically deposited on the ITO surface. Atomic force microscopy (AFM) was employed to map the surfaces of the films. Comparison of the morphological, photochemical and electrochemical properties of these films indicated that the dansylglycine film electrodeposited on ITO exhibited electrochemical response, emitted a higher level of fluorescence, presented greater surface roughness and larger relative surface area in comparison with its dansyl chloride-chitosan counterpart. This behavior can be attributed to the higher number of active sites present in the well-organized and rough structure of the electrodeposited film in comparison with the chemically produced filmsSociedade Brasileira de Química2011-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532011000900025Journal of the Brazilian Chemical Society v.22 n.9 2011reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532011000900025info:eu-repo/semantics/openAccessSilva,Ana Julia CSilva Jr,José GinaldoAlves Jr,SeverinoTonholo,JosealdoRibeiro,Adriana Seng2011-09-20T00:00:00Zoai:scielo:S0103-50532011000900025Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2011-09-20T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Dansyl-based fluorescent films prepared by chemical and electrochemical methods: cyclic voltammetry, afm and spectrofluorimetry characterization |
title |
Dansyl-based fluorescent films prepared by chemical and electrochemical methods: cyclic voltammetry, afm and spectrofluorimetry characterization |
spellingShingle |
Dansyl-based fluorescent films prepared by chemical and electrochemical methods: cyclic voltammetry, afm and spectrofluorimetry characterization Silva,Ana Julia C fluorescent films chitosan dansyl derivatives atomic force microscopy |
title_short |
Dansyl-based fluorescent films prepared by chemical and electrochemical methods: cyclic voltammetry, afm and spectrofluorimetry characterization |
title_full |
Dansyl-based fluorescent films prepared by chemical and electrochemical methods: cyclic voltammetry, afm and spectrofluorimetry characterization |
title_fullStr |
Dansyl-based fluorescent films prepared by chemical and electrochemical methods: cyclic voltammetry, afm and spectrofluorimetry characterization |
title_full_unstemmed |
Dansyl-based fluorescent films prepared by chemical and electrochemical methods: cyclic voltammetry, afm and spectrofluorimetry characterization |
title_sort |
Dansyl-based fluorescent films prepared by chemical and electrochemical methods: cyclic voltammetry, afm and spectrofluorimetry characterization |
author |
Silva,Ana Julia C |
author_facet |
Silva,Ana Julia C Silva Jr,José Ginaldo Alves Jr,Severino Tonholo,Josealdo Ribeiro,Adriana S |
author_role |
author |
author2 |
Silva Jr,José Ginaldo Alves Jr,Severino Tonholo,Josealdo Ribeiro,Adriana S |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Silva,Ana Julia C Silva Jr,José Ginaldo Alves Jr,Severino Tonholo,Josealdo Ribeiro,Adriana S |
dc.subject.por.fl_str_mv |
fluorescent films chitosan dansyl derivatives atomic force microscopy |
topic |
fluorescent films chitosan dansyl derivatives atomic force microscopy |
description |
Dansyl-based fluorescent films were prepared by two different methods. In one of them, the surface of an indium tin oxide (ITO) electrode was coated with a film of chitosan and the polymer subsequently derivatized with dansyl chloride, whilst in the second method a film of dansylglycine was electrochemically deposited on the ITO surface. Atomic force microscopy (AFM) was employed to map the surfaces of the films. Comparison of the morphological, photochemical and electrochemical properties of these films indicated that the dansylglycine film electrodeposited on ITO exhibited electrochemical response, emitted a higher level of fluorescence, presented greater surface roughness and larger relative surface area in comparison with its dansyl chloride-chitosan counterpart. This behavior can be attributed to the higher number of active sites present in the well-organized and rough structure of the electrodeposited film in comparison with the chemically produced films |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-09-01 |
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=S0103-50532011000900025 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532011000900025 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-50532011000900025 |
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 |
Journal of the Brazilian Chemical Society v.22 n.9 2011 reponame:Journal of the Brazilian Chemical Society (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Journal of the Brazilian Chemical Society (Online) |
collection |
Journal of the Brazilian Chemical Society (Online) |
repository.name.fl_str_mv |
Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
||office@jbcs.sbq.org.br |
_version_ |
1750318172675768320 |