Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/48423
Título: | Fluorescent phenanthroimidazoles functionalized with heterocyclic spacers: synthesis, optical chemosensory ability and two-photon absorption (TPA) properties |
Autor(es): | Ferreira, Rosa Cristina Moutinho Costa, Susana P. G. Gonçalves, Hugo Manuel Castro Belsley, M. Raposo, M. Manuela M. |
Data: | 7-Nov-2017 |
Editora: | Royal Society of Chemistry |
Revista: | New Journal of Chemistry |
Resumo(s): | Three series of fluorescent phenanthroimidazoles bearing heterocyclic spacers were synthesized in moderate to excellent yields and evaluated as optical chemosensors for ions as well as two-photon absorbing chromophores. Interaction of compounds 5-7 with anions and cations in acetonitrile and acetonitrile/H2O (95 : 5) showed them to be selective receptors for several anions (AcO-, CN- and F-) and cations (Fe3+, Cu2+ and Pd2+), with compound 7a being the most sensitive receptor for Fe3+ and Cu2+. On the other hand, compounds 5a, 7b and 7c were the most sensitive receptors for AcO-, CN- and F-. The binding stoichiometry between the receptors and the anions and cations was found to be 1 : 2 (ligand to anion/metal cation). The binding process was also followed by H-1 NMR titrations. The evaluation of the TPA properties of chosen phenanthroimidazoles 7a-c by the two-photon induced fluorescence method revealed that compound 7c, which contains a bithienyl spacer, exhibited the highest TPA cross-section (sigma(2)) value. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/48423 |
DOI: | 10.1039/c7nj02113e |
ISSN: | 1144-0546 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CDF - FAMO - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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New Journal of Chemistry, 2017, 41, 12866 - 12878.pdf Acesso restrito! | 3,77 MB | Adobe PDF | Ver/Abrir |