Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/33865
Título: | Fast and fully reversible photochromic performance of hybrid sol-gel films doped with a fused-naphthopyran |
Autor(es): | Coelho, Paulo J. Silva, Carlos J. R. Sousa, Céu M. Moreira, S. |
Data: | 2013 |
Editora: | Royal Society of Chemistry |
Revista: | Journal of Materials Chemistry C |
Resumo(s): | A new type of photochromic naphthopyran with a fused structure was embedded in an organic–inorganic amine–alcohol–silicate hybrid gel producing colourless, transparent and flexible photochromic films. Under UV-vis light these materials developed, in less than 30 s, intense yellow-orange colours that faded completely in the dark in 3 min. This behaviour contrasts with the usual performance of common naphthopyrans that always generate two coloured species which fade with different kinetics, leading to the formation of a residual colour that persists for several minutes/hours. The structural design of this new naphthopyran prevents the formation of the long-lived coloured species and therefore fully reversible photo-switchable materials can be easily obtained. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/33865 |
DOI: | 10.1039/c3tc31223b |
ISSN: | 2050-7488 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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P41_JMatChemC_2013.pdf Acesso restrito! | 402,24 kB | Adobe PDF | Ver/Abrir |