Heterocyclic dicyanovinyl derivatives: synthesis and evaluation of the chemosensory ability in aqueous solution

doi:10.3390/ecsa-3-B001

Utilize este identificador para referenciar este registo: https://hdl.handle.net/1822/44653

Título:	Heterocyclic dicyanovinyl derivatives: synthesis and evaluation of the chemosensory ability in aqueous solution
Autor(es):	Ferreira, Rosa Cristina Moutinho Costa, Susana P. G. Raposo, M. Manuela M.
Palavras-chave:	Knoevenagel reaction Benzofuran Benzoindole Push-pull dicyanovinyl heterocyclic compounds Colorimetric sensors Aqueous media
Data:	2017
Editora:	MDPI
Citação:	Ferreira, R. C. M.; Costa, S. P. G.; Raposo, M. M. M. Heterocyclic dicyanovinyl derivatives: synthesis and evaluation of the chemosensory ability in aqueous solution. Proceedings of the 3rd Int. Electron. Conf. Sens. Appl., 2017, 1, 30. doi: 10.3390/ecsa-3-B001
Resumo(s):	Two novel dicyanovinyl derivatives 3a-b were synthesized in moderate to good yields through a Knoevenagel reaction of the corresponding aldehyde precursors and malononitrile. The photophysical properties of the new push-pull systems were studied by UV-vis and fluorescence spectroscopy in acetonitrile. The evaluation of the compounds as colorimetric chemosensors was carried out by performing spectrophotometric titrations in acetonitrile and acetonitrile/water in the presence of relevant organic and inorganic anions, and of alkaline, alkaline-earth and transition metal cations. The benzoindole derivative exhibited great selectivity for the cyanide anion over other anions in acetonitrile/water (8:2) solution showing a distinct color change from colorless to yellow.
Tipo:	Artigo em ata de conferência
URI:	https://hdl.handle.net/1822/44653
DOI:	10.3390/ecsa-3-B001
Versão da editora:	http://wsforum.org/conference/ecsa-3/paper/3758
Arbitragem científica:	yes
Acesso:	Acesso aberto
Aparece nas coleções:	CDQuim - Comunicações e Proceedings