An Imidazo[1,2-a]pyridine Derivative That Enables Selective and Sequential Sensing of Cu2+ and CN

摘要

We report a triazole appended imidazopyridine based chemo- sensor (probe 1) for sequential detection of Cu2+ and CN-ions using fluorometry. Probe 1 is fluorescent in aqueous acetonitrile (H2O-CH3CN, 1:1, v/v) when common metal ions are present, but the fluorescence is quenched when Cu2+ is present. The binding mechanism, quantitative determination and the mode of interaction of Cu2+ with probe 1 are explained using fluorescence spectroscopy, electrospray ionization mass spectrometry and Density Functional Theory (DFT) calculations.