Abstract

The new Ligand was developed and characterized by different spectroscopic techniques such as NMR, mass spectrometry, single crystal XRD and photophysical studies. The ligand was shown colorimetric and turn-OFF behavior for Hg2+ and Cu2+ ions via PET and CHQF mechanisms respectively, whereas it shows turn-ON demeanor for Cd2+ metal ions among other metal ions through CHEF mechanism. It demonstrated good sensitivity toward Hg2+, Cu2+, and Cd2+ ions ca. 0.33 μM, 0.16 μM and 0.11 μM respectively, with a good binding constant in 100% aqueous medium. The binding of these metal ions with ligand was supported through NMR titration, mass spectrometry, electrochemical studies, and FT-IR spectroscopy. In-situ experiment appended with copper ion was supported for selective detection of cyanide ion among other anions and given 0.29 μM limit of detection for cyanide ion. The practical applications such as real water analysis and logic gate were successfully demonstrated with it.

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