Synthesis and ion sensing properties of new colorimetric and fluorimetric chemosensors based on bithienyl-imidazo-anthraquinone chromophores

Rosa M. F. Batista, Elisabete Oliveira, Susana P. G. Costa, Carlos Lodeiro, M. Manuela M. Raposo

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Novel colorimetric receptors for fluoride ion sensing containing anthraquinone as a chromogenic signaling unit and imidazo-2,2′-bithiophene binding sites are reported. Well-defined color change was observed upon addition of fluoride ions to acetonitrile solutions of receptors 2. Compounds 2a-c, deprotonated after fluoride ion addition, were studied as metal ion chemosensors in the presence of Zn(II), Hg(II), and Cu(II) in acetonitrile solutions, especially compound 2a which displayed a marked change from pink to yellow-gold colors upon complexation.

Original languageEnglish
Pages (from-to)3201-3204
Number of pages4
JournalOrganic Letters
Issue number17
Publication statusPublished - 16 Aug 2007


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