On the interaction of encapsulated pH indicator species within a silica matrix produced by three sol–gel routes

Detalhes bibliográficos
Autor(a) principal: Rocha, Zenis N. da
Data de Publicação: 2011
Outros Autores: Capeletti, Larissa Brentano, Radtke, Cláudio, Santos, João Henrique Zimnoch dos, Moncada, Edwin, Pepe, Iuri Muniz
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://repositorio.ufba.br/ri/handle/ri/14579
Resumo: Texto completo: acesso restrito. p. 256–263
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spelling Rocha, Zenis N. daCapeletti, Larissa BrentanoRadtke, CláudioSantos, João Henrique Zimnoch dosMoncada, EdwinPepe, Iuri MunizRocha, Zenis N. daCapeletti, Larissa BrentanoRadtke, CláudioSantos, João Henrique Zimnoch dosMoncada, EdwinPepe, Iuri Muniz2014-02-13T11:49:05Z20110927-7757http://repositorio.ufba.br/ri/handle/ri/14579v. 392, n. 1Texto completo: acesso restrito. p. 256–263Solid acid–base sensors were prepared by encapsulating two pH indicators (brilliant yellow or acridine) within a silica matrix by the sol–gel method using three different routes: (1) non-hydrolytic, (2) acid catalyzed and (3) base catalyzed. The interactions of the silica-indicator with the resulting materials were then investigated by cyclic and differential pulse voltammetry. Complementary, ultraviolet–visible, photoacoustic spectroscopy was employed for the characterization of the interactions by monitoring the band shifts (bathochromic or hypsochromic, depending on the sol–gel route) between the neat pH indicators and those encapsulated within the silica network. Furthermore, X-ray photoelectron spectroscopy showed that the N 1s binding energy in brilliant yellow was shifted for the material resulting from the acid route. The electrochemical behavior and the pH indicator interactions with the silica network were dependent on the nature of the employed sol–gel route. For the sensors prepared with acridine, the interactions with the silica network took place through the nitrogen group from the pyridinic ring. For the brilliant yellow indicator, different behaviors were observed depending on the route, suggesting different processes during preparation or analysis. For the basic catalyzed and non-hydrolytic routes, it was not possible to assign a specific interaction. Nevertheless, it seemed that interactions might have taken place through the hydroxyl and/or sulphonic groups. Furthermore, for the brilliant yellow sensor prepared through the acid route, it was possible to show that the interaction probably or partially occurred through the azo groups.Submitted by Edileide Reis (leyde-landy@hotmail.com) on 2014-02-13T11:49:05Z No. of bitstreams: 1 Zenis Rocha.pdf: 702039 bytes, checksum: 28a2396b4c23f380be2313391561c1dc (MD5)Made available in DSpace on 2014-02-13T11:49:05Z (GMT). No. of bitstreams: 1 Zenis Rocha.pdf: 702039 bytes, checksum: 28a2396b4c23f380be2313391561c1dc (MD5) Previous issue date: 2011http://dx.doi.org/10.1016/j.colsurfa.2011.10.002reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAOn the interaction of encapsulated pH indicator species within a silica matrix produced by three sol–gel routesColloids and Surfaces A: Physicochemical and Engineering Aspectsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10000-01-01info:eu-repo/semantics/openAccessengORIGINALZenis Rocha.pdfZenis Rocha.pdfapplication/pdf702039https://repositorio.ufba.br/bitstream/ri/14579/1/Zenis%20Rocha.pdf28a2396b4c23f380be2313391561c1dcMD51LICENSElicense.txtlicense.txttext/plain1345https://repositorio.ufba.br/bitstream/ri/14579/2/license.txtff6eaa8b858ea317fded99f125f5fcd0MD52TEXTZenis Rocha.pdf.txtZenis Rocha.pdf.txtExtracted texttext/plain40830https://repositorio.ufba.br/bitstream/ri/14579/3/Zenis%20Rocha.pdf.txt28b0f5fd85c7214fec5dbe91e0e69123MD53ri/145792022-07-05 14:02:55.525oai:repositorio.ufba.br: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Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-07-05T17:02:55Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false
dc.title.pt_BR.fl_str_mv On the interaction of encapsulated pH indicator species within a silica matrix produced by three sol–gel routes
dc.title.alternative.pt_BR.fl_str_mv Colloids and Surfaces A: Physicochemical and Engineering Aspects
title On the interaction of encapsulated pH indicator species within a silica matrix produced by three sol–gel routes
spellingShingle On the interaction of encapsulated pH indicator species within a silica matrix produced by three sol–gel routes
Rocha, Zenis N. da
title_short On the interaction of encapsulated pH indicator species within a silica matrix produced by three sol–gel routes
title_full On the interaction of encapsulated pH indicator species within a silica matrix produced by three sol–gel routes
title_fullStr On the interaction of encapsulated pH indicator species within a silica matrix produced by three sol–gel routes
title_full_unstemmed On the interaction of encapsulated pH indicator species within a silica matrix produced by three sol–gel routes
title_sort On the interaction of encapsulated pH indicator species within a silica matrix produced by three sol–gel routes
author Rocha, Zenis N. da
author_facet Rocha, Zenis N. da
Capeletti, Larissa Brentano
Radtke, Cláudio
Santos, João Henrique Zimnoch dos
Moncada, Edwin
Pepe, Iuri Muniz
author_role author
author2 Capeletti, Larissa Brentano
Radtke, Cláudio
Santos, João Henrique Zimnoch dos
Moncada, Edwin
Pepe, Iuri Muniz
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Rocha, Zenis N. da
Capeletti, Larissa Brentano
Radtke, Cláudio
Santos, João Henrique Zimnoch dos
Moncada, Edwin
Pepe, Iuri Muniz
Rocha, Zenis N. da
Capeletti, Larissa Brentano
Radtke, Cláudio
Santos, João Henrique Zimnoch dos
Moncada, Edwin
Pepe, Iuri Muniz
description Texto completo: acesso restrito. p. 256–263
publishDate 2011
dc.date.issued.fl_str_mv 2011
dc.date.accessioned.fl_str_mv 2014-02-13T11:49:05Z
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://repositorio.ufba.br/ri/handle/ri/14579
dc.identifier.issn.none.fl_str_mv 0927-7757
dc.identifier.number.pt_BR.fl_str_mv v. 392, n. 1
identifier_str_mv 0927-7757
v. 392, n. 1
url http://repositorio.ufba.br/ri/handle/ri/14579
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.pt_BR.fl_str_mv http://dx.doi.org/10.1016/j.colsurfa.2011.10.002
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
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reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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