Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/1024| Título: | Synthesis and reactivity of photochromic 2H-chromenes based on 3-carboxylated coumarins |
| Autor(es): | Cerqueira, N. M. F. S. A. 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. |
| Palavras-chave: | Photochromic Carboxylated coumarins 2H-chromenes Benzopyrans |
| Data: | 22-Set-2003 |
| Editora: | Wiley |
| Revista: | Helvetica Chimica Acta |
| Citação: | CERQUEIRA, Nuno. M. F. S. A. [et al.] - Synthesis and reactivity of photochromic 2H-chromenes based on 3-carboxylated coumarins. “Helvetica chimica acta” [Em linha]. 86:9 (2003) 3244-3253. [Consult. 8 Abr. 2005]. Disponível em: http://www3.interscience.wiley.com/cgi-bin/fulltext/105558796/PDFSTART. |
| Resumo(s): | 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. |
| Tipo: | Artigo |
| URI: | https://hdl.handle.net/1822/1024 |
| DOI: | 10.1002/hlca.200390264 |
| ISSN: | 0018-019X |
| Arbitragem científica: | yes |
| Acesso: | Acesso aberto |
| Aparece nas coleções: | CDQuim - Artigos (Papers) |
