Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/21921
Título: | Photoswitching in azo dyes bearing thienylpyrrole and benzothiozole heterocyclic systems |
Autor(es): | Coelho, Paulo J. Castro, M. Cidália R. Fonseca, A. Maurício C. Raposo, M. Manuela M. |
Palavras-chave: | Photochromism Heterocyclic azo dyes Benzothiazole Pyrrole Thiophene Photoswitching UV/vis spectroscopy |
Data: | 2012 |
Editora: | Elsevier 1 |
Revista: | Dyes and Pigments |
Resumo(s): | Visible light promotes the conversion of the E-isomer of benzothiazol-2-yl and benzothiazol-6-yl diazenes to the thermal unstable Z-isomer that reverts in few seconds to the initial form. The kinetics of the thermal Z / E process is strongly influenced by the linkage position of the N]N function to the benzothiazole heterocycle. Thienylpyrrole azo dyes functionalized with benzothiazol-6-yl groups are particularly interesting since they show an excellent compromise between the switching speed (rate constants: 0.068-0.12 s-1) and the amplitude of the absorbance variation (37-42%). |
Tipo: | Artigo |
Descrição: | Dedicated to the Centenary of the Portuguese Chemical Society |
URI: | https://hdl.handle.net/1822/21921 |
DOI: | 10.1016/j.dyepig.2011.06.019 |
ISSN: | 0143-7208 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Dyes Pigments 2- 2012.pdf | Documento principal | 284,33 kB | Adobe PDF | Ver/Abrir |