Utilize este identificador para referenciar este registo: http://hdl.handle.net/1822/31835

TítuloNaphtyl-imidazo-anthraquinones as novel colorimetric and fluorimetric chemosensors for ion sensing
Autor(es)Batista, Rosa M. F.
Costa, Susana P. G.
Raposo, M. Manuela M.
Colorimetric and fluorimetric chemosensors
Aqueous media
Naked-eye detection
Fluoride, Cyanide
RevistaJournal of Photochemistry and Photobiology A: Chemistry
CitaçãoR.M.F. Batista et al., Journal of Photochemistry and Photobiology A: Chemistry 259 (2013) 33–40
Resumo(s)Novel colorimetric and fluorimetric chemosensors for F− and CN− containing anthraquinone and imidazole as signalling/binding sites have been synthesised and characterised. Upon addition of F−, CN− and OH− to acetonitrile solutions of compounds 1-2, a marked colour change from yellow to pink was observed and the fluorescence emission of 1 was switched “on”, whereas for 2 there was a fluorescence quenching. Considering recognition in organic aqueous mixture, it was found that selectivity for CN- was achieved for both receptors, with an easily detectable colour change from yellow to orange. Compounds 1-2 in their deprotonated form, after fluoride addition, were studied as metal ion chemosensors and displayed a drastic change from pink to yellow after metal ion complexation giving a yellow-pink-yellow, reversible colorimetric reaction and a “on-off-on” fluorescence in acetonitrile. The binding stoichiometry between the receptors and the anions and cations was found to be 1:1 and 2:1 respectively. The binding process was also followed by 1H NMR titrations which corroborated the previous findings.
Versão da editorahttp://www.sciencedirect.com/science/article/pii/S1010603013000890
Arbitragem científicayes
Aparece nas coleções:CDQuim - Artigos (Papers)

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
manuscript JPPA 2013.pdf4,58 MBAdobe PDFVer/Abrir

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu Currículo DeGóis