Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/38109
Título: | Fast (hetero)aryl-benzothiazolium ethenes photoswitches activated by visible-light at room temperature |
Autor(es): | Coelho, Paulo J. Castro, M. Cidália R. Raposo, M. Manuela M. |
Palavras-chave: | Diarylethenes Photochromism Cis-trans isomerization Molecular switches Pyrrole Benzothiazole Synthesis Heterocycles |
Data: | Jun-2015 |
Editora: | Elsevier 1 |
Revista: | Dyes Pigments |
Citação: | Coelho, P. J., Castro, M. C. R., & Raposo, M. M. M. (2015). Fast (hetero) aryl-benzothiazolium ethenes photoswitches activated by visible-light at room temperature. Dyes and Pigments, 117, 163-169 |
Resumo(s): | A series of novel photochromic cationic stilbenes dyes bearing different aromatic systems were easily synthesized from (hetero)aromatic aldehydes. The photoisomerization of the double bond can be achieved through irradiation with ultraviolet or visible light, for few seconds, leading to the Z isomers that returns much faster to the initial state than common stilbenes. Benzothiazolium dyes with electron donating substituents exhibited very fast thermal back reactions (<1 s). Pyrrole-benzothiazolium dye showed a higher lifetime of the Z isomer, in different solvents, including water (0.45 - 7.1 min). This cationic diarylethene can be switched between the E-Z states using visible light, in few minutes at room temperature, with a noticeable change in the visible spectrum. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/38109 |
DOI: | 10.1016/j.dyepig.2015.02.015 |
ISSN: | 0143-7208 |
Versão da editora: | http://www.sciencedirect.com/science/article/pii/S0143720815000583 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Dyes Pigments 2015, 117 163-169.pdf Acesso restrito! | 740,16 kB | Adobe PDF | Ver/Abrir |