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American Chemical Society, Organic Letters, 17(9), p. 3201-3204, 2007

DOI: 10.1021/ol071029b

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Synthesis and Ion Sensing Properties of New Colorimetric and Fluorimetric Chemosensors Based on Bithienyl-Imidazo-Anthraquinone Chromophores

Journal article published in 2007 by Rosa M. F. Batista, Elisabete Oliveira, Susana P. G. Costa ORCID, Carlos Lodeiro ORCID, M. Manuela M. Raposo ORCID, M. Manuela M. Raposo
This paper is available in a repository.
This paper is available in a repository.

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Abstract

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.