Novel photochromic 2,2´-bithiophene azo dyes

Bibliographic Details
Main Author: Coelho, Paulo J.
Publication Date: 2009
Other Authors: Carvalho, Luís H. Melo de, Moura, João C. V. P., Raposo, M. Manuela M.
Format: Article
Language: eng
Source: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
Download full: https://hdl.handle.net/1822/10647
Summary: The photochromic behaviour of two series of 2,2’-bithiophene azo dyes in THF solutions was studied. The photochromic properties and colour constancy were strongly dependent on the substitution pattern of the dyes. Under visible irradiation (> 420 nm) while some dyes exhibited a significant change in the colour intensity others exhibited an almost stable absorption. The photokinetic parameters of these systems are described.
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spelling Novel photochromic 2,2´-bithiophene azo dyesPhotochromismHeterocyclic azo dyesSynthesisAzo couplingBithiopheneAzo dyesUV-Visible spectroscopyUV/vis spectroscopyScience & TechnologyThe photochromic behaviour of two series of 2,2’-bithiophene azo dyes in THF solutions was studied. The photochromic properties and colour constancy were strongly dependent on the substitution pattern of the dyes. Under visible irradiation (> 420 nm) while some dyes exhibited a significant change in the colour intensity others exhibited an almost stable absorption. The photokinetic parameters of these systems are described.Fundação para a Ciência e a Tecnologia (FCT)ElsevierUniversidade do MinhoCoelho, Paulo J.Carvalho, Luís H. Melo deMoura, João C. V. P.Raposo, M. Manuela M.2009-082009-08-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/10647eng"Dyes and Pigments". ISSN 0143-7208. 82:2 (Aug. 2009) 130-133.0143-720810.1016/j.dyepig.2008.12.005info:eu-repo/semantics/openAccessreponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiainstacron:RCAAP2025-04-12T04:35:52Zoai:repositorium.sdum.uminho.pt:1822/10647Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireinfo@rcaap.ptopendoar:https://opendoar.ac.uk/repository/71602025-05-28T15:27:43.979457Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiafalse
dc.title.none.fl_str_mv Novel photochromic 2,2´-bithiophene azo dyes
title Novel photochromic 2,2´-bithiophene azo dyes
spellingShingle Novel photochromic 2,2´-bithiophene azo dyes
Coelho, Paulo J.
Photochromism
Heterocyclic azo dyes
Synthesis
Azo coupling
Bithiophene
Azo dyes
UV-Visible spectroscopy
UV/vis spectroscopy
Science & Technology
title_short Novel photochromic 2,2´-bithiophene azo dyes
title_full Novel photochromic 2,2´-bithiophene azo dyes
title_fullStr Novel photochromic 2,2´-bithiophene azo dyes
title_full_unstemmed Novel photochromic 2,2´-bithiophene azo dyes
title_sort Novel photochromic 2,2´-bithiophene azo dyes
author Coelho, Paulo J.
author_facet Coelho, Paulo J.
Carvalho, Luís H. Melo de
Moura, João C. V. P.
Raposo, M. Manuela M.
author_role author
author2 Carvalho, Luís H. Melo de
Moura, João C. V. P.
Raposo, M. Manuela M.
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Coelho, Paulo J.
Carvalho, Luís H. Melo de
Moura, João C. V. P.
Raposo, M. Manuela M.
dc.subject.por.fl_str_mv Photochromism
Heterocyclic azo dyes
Synthesis
Azo coupling
Bithiophene
Azo dyes
UV-Visible spectroscopy
UV/vis spectroscopy
Science & Technology
topic Photochromism
Heterocyclic azo dyes
Synthesis
Azo coupling
Bithiophene
Azo dyes
UV-Visible spectroscopy
UV/vis spectroscopy
Science & Technology
description The photochromic behaviour of two series of 2,2’-bithiophene azo dyes in THF solutions was studied. The photochromic properties and colour constancy were strongly dependent on the substitution pattern of the dyes. Under visible irradiation (> 420 nm) while some dyes exhibited a significant change in the colour intensity others exhibited an almost stable absorption. The photokinetic parameters of these systems are described.
publishDate 2009
dc.date.none.fl_str_mv 2009-08
2009-08-01T00:00:00Z
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/1822/10647
url https://hdl.handle.net/1822/10647
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv "Dyes and Pigments". ISSN 0143-7208. 82:2 (Aug. 2009) 130-133.
0143-7208
10.1016/j.dyepig.2008.12.005
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:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron:RCAAP
instname_str FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron_str RCAAP
institution RCAAP
reponame_str Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
collection Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
repository.name.fl_str_mv Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
repository.mail.fl_str_mv info@rcaap.pt
_version_ 1833595331302916096

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