Detalhes bibliográficos
| Resumo: | New photochromic 2H-chromenes including a 3-carboxylated coumarin nucleus were synthesised from hydroxycoumarins, and, in one case, the corrresponding trimethoxysilylcarboxamide was prepared. The photochromic behaviour was studied under flash photolysis conditions. The introduction of electron-withdrawing substituents in this position of the coumarin nucleus led to a global and significant bathochromic shift in the spectra of the open forms and to an interesting intensification in the colorability. |
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| Autores principais: | Cerqueira, N. M. F. S. A. |
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| Outros Autores: | Rodrigues, Lígia M.; Campos, Ana M. F. Oliveira; Carvalho, Luís H. Melo de; Coelho, Paulo J.; Dubest, Roger; Aubard, Jean; Samat, André; Guglielmetti, Robert J. |
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| Assunto: | Photochromic Carboxylated coumarins 2H-chromenes Benzopyrans |
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| Ano: | 2003 |
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| País: | Portugal |
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| Tipo de documento: | artigo |
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| Tipo de acesso: | acesso aberto |
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| Instituição associada: | Universidade do Minho |
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| Idioma: | inglês |
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| Origem: | RepositóriUM - Universidade do Minho |
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