title: Colorimetric probes based on anthraimidazolediones for selective sensing of fluoride and cyanide ion via intramolecular charge transfer.
abstract: Probes based on anthra[1,2-d]imidazole-6,11-dione were designed and synthesized for selective ion sensing. Each probe acted as strong colorimetric sensors for fluoride and cyanide ions and exhibited intramolecular charge transfer (ICT) band, which showed significant red-shifts after addition of either the F(-) or CN(-) ion. One of the probes (2) showed selective colorimetric sensing for both cyanide and fluoride ions. In organic medium, 2 showed selective color change with fluoride and cyanide, whereas in aqueous organic medium it showed a ratiometric response selectively for cyanide ion.
authors: Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, India.
authors: Namita
authors: N
authors: Kumari
authors: Satadru
authors: S
authors: Jha
authors: Santanu
authors: S
authors: Bhattacharya
mesh_terms: D003124:Colorimetry / Q000379:methods*; D003486:Cyanides / Q000032:analysis* / Q000737:chemistry; D005456:Fluorescent Dyes / Q000138:chemical synthesis*; D005459:Fluorides / Q000032:analysis* / Q000737:chemistry; D007093:Imidazoles / Q000138:chemical synthesis*; D007477:Ions / Q000032:analysis / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D013050:Spectrometry, Fluorescence; D055672:Static Electricity
chemical_list: D003486:Cyanides; D005456:Fluorescent Dyes; D007093:Imidazoles; D007477:Ions; D005459:Fluorides