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https://hdl.handle.net/1822/7903
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Campo DC | Valor | Idioma |
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dc.contributor.author | Coelho, Paulo J. | - |
dc.contributor.author | Carvalho, Luís H. Melo de | - |
dc.contributor.author | Fonseca, A. Maurício C. | - |
dc.contributor.author | Raposo, M. Manuela M. | - |
dc.date.accessioned | 2008-06-04T14:04:35Z | - |
dc.date.available | 2008-06-04T14:04:35Z | - |
dc.date.issued | 2006 | - |
dc.date.submitted | 2006 | - |
dc.identifier.citation | Coelho, P. J., Carvalho, L. M., Fonseca, A. M. C., & Raposo, M. M. M. (2006). Photochromic properties of thienylpyrrole azo dyes in solution. Tetrahedron Letters, 47(22), 3711-3714. doi: https://doi.org/10.1016/j.tetlet.2006.03.125 | eng |
dc.identifier.issn | 0040-4039 | eng |
dc.identifier.uri | https://hdl.handle.net/1822/7903 | - |
dc.description.abstract | The photochromic behaviour of thienylpyrrole azo dyes in THF solutions was studied for the first time. The photochromic properties are strongly dependent on the substitution pattern on the dyes. Nitro-substituted thienylpyrrole azo dyes are particularly interesting since they exhibit very fast colouration/decolouration processes. The activation energies of these compounds are among the lowest values reported for heterocyclic azo dyes. These compounds show aggregation phenomena in freshly prepared solutions of THF, which lead to variable photochromic behaviours. Only after 1–5 h the solutions reach equilibrium and then reproducible photochromic behaviour can be observed. | eng |
dc.description.sponsorship | Fundação para a Ciência e Tecnologia (FCT) | por |
dc.description.sponsorship | To FCT (Portugal’s Foundation for Science and Technology) and FEDER for financial support to the research units Centro de Química-Vila Real (POCTI-SFA-3-616) and Centro de Química-Universidade do Minho (POCTI/QUI/37816/2001). We also thank Dr. Kevin Yager (McGill University) for the helpful suggestions and the group of University of Minho is also grateful to Professor G. Kirsch (University of Metz). | - |
dc.language.iso | eng | eng |
dc.publisher | Elsevier 1 | eng |
dc.relation | info:eu-repo/grantAgreement/FCT/POCI/POCTI%2FQUI%2F37816%2F2001/PT | - |
dc.rights | openAccess | eng |
dc.subject | Photochromism | eng |
dc.subject | Heterocyclic azo dyes | eng |
dc.subject | Thienylpyrroles | eng |
dc.subject | Aggregation | eng |
dc.title | Photochromic properties of thienylpyrrole azo dyes in solution | eng |
dc.type | article | por |
dc.peerreviewed | yes | eng |
dc.relation.publisherversion | https://www.sciencedirect.com/science/article/pii/S0040403906006071 | - |
sdum.number | 22 | eng |
sdum.pagination | 3711-3714 | eng |
sdum.publicationstatus | published | eng |
sdum.volume | 47 | eng |
oaire.citationStartPage | 3711 | por |
oaire.citationEndPage | 3714 | por |
oaire.citationIssue | 22 | por |
oaire.citationVolume | 47 | por |
dc.identifier.doi | 10.1016/j.tetlet.2006.03.125 | por |
dc.subject.wos | Science & Technology | por |
sdum.journal | Tetrahedron Letters | por |
Aparece nas coleções: | CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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manuscript.pdf | Documento principal | 764,7 kB | Adobe PDF | Ver/Abrir |