Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/49045
Título: | Photolytic release of bioactive carboxylic acids from fused pyran conjugates |
Autor(es): | Conceição, Rafaela Hungerford, Graham Costa, Susana P. G. Gonçalves, M. Sameiro T. |
Palavras-chave: | Phototriggers Caging groups Neurotransmitters Coumarins Photolysis |
Data: | 2018 |
Editora: | Elsevier 1 |
Revista: | Dyes and Pigments |
Citação: | R . Conceição, G. Hungerford, S. P. G. Costa, M. S. T. Gonçalves, “Photolytic release of bioactive carboxylic acids from fused pyran conjugates”, Dyes Pigments, 2018, 148, 368-379. |
Resumo(s): | New ester cages bearing the coumarin (2H-benzopyran-2-one) skeleton with extended π-systems as phototriggers, for glycine and β-alanine, as models of carboxylic acid bifunctional molecules with biological relevance, were evaluated under photolysis conditions at 254, 300, 350 and 419 nm of irradiation in a RPR-100 photochemical reactor. The processes were followed by HPLC-UV detection and 1H NMR with collection of kinetic data. The results showed a correlation between the photolysis efficiency and the increasing extension of the conjugation for both glycine and β-alanine, showing that the 7-aminocoumarin afforded the best results at all wavelengths tested. From a study of the time-resolved fluorescence behaviour, these compounds were also found to exhibit more complex fluorescence decay kinetics. This was attributed to the presence of conjugated and non-conjugated coumarin species. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/49045 |
DOI: | 10.1016/j.dyepig.2017.09.023 |
ISSN: | 0143-7208 |
e-ISSN: | 1873-3743 |
Versão da editora: | https://doi.org/10.1016/j.dyepig.2017.09.023 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Photolytic release of bioactive carboxylic acids from fused pyran conjugates.pdf | 2,02 MB | Adobe PDF | Ver/Abrir |
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