Synthesis and ion sensing properties of new colorimetric and fluorimetric chemosensors based on bithienyl-imidazo-anthraquinone chromophores.
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.
Batista
Rosa M F
RM
Centro de Química, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
Oliveira
Elisabete
E
Costa
Susana P G
SP
Lodeiro
Carlos
C
Raposo
M Manuela M
MM
D000097:Acetonitriles; D000880:Anthraquinones; D003124:Colorimetry; D005459:Fluorides / Q000032:analysis*; D005470:Fluorometry; D007477:Ions / Q000032:analysis*; D008670:Metals / Q000032:analysis*; D015336:Molecular Probe Techniques; D012996:Solutions
D000097:Acetonitriles; D000880:Anthraquinones; D007477:Ions; D008670:Metals; D012996:Solutions; D005459:Fluorides; C032159:acetonitrile