Synthesis and ion sensing properties of new colorimetric and fluorimetric chemo...

• Author(s): Batista, Rosa M. F. ; Oliveira, Elisabete ; Costa, Susana P. G. ; Lodeiro, Carlos ; Raposo, M. Manuela M.
• Date: 2007
• Persistent ID: http://hdl.handle.net/1822/17793
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): Colorimetric and fluorimetric Chemosensors; Anion sensors; Cation sensors; Bithiophene; Anthraquinone; Bithienyl-Imidazo-anthraquinone; Synthesis; Heterocycles
• Document Type: Article
• Language: English

Description

Novel colorimetric receptors for fluoride ion sensing containing anthraquinone as chromogenic signalling unity and imidazo-2,2´-bithiophene binding sites are reported. Well defined color change was observed upon addition of fluoride ion 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 solution, specially compound 2a which displayed a marked change from pink to yellow-gold colors upon complexation.