A new NBD-based sensor bearing a dipicolylamine derivative, (2-pyridylmethyl)(2-quinolylmethyl)amine (1 ), was synthesized, and its chromogenic and fluorogenic behaviorstoward various metal ions were investigated in methanol solution. Chemosensor 1  selectively detected Hg2+ ions through color change from yellow to colorless. In addition, chemosensor 1  exhibited highly Hg2+-selective ON-OFF fluorescence quenching behavior and was shown to discriminate various competing metal ions, particularly, such as Cu2+, Ag+ and Pb2+. The binding mode of 1 -Hg2+ was found to be a 1:2 complex formation, based on Job plot and 1HNMR titration.

Selective colorimetric and fluorescent chemosensor for Hg<sup>2+</sup>

247th National Meeting (2014)

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Selective colorimetric and fluorescent chemosensor for Hg2+

Selective colorimetric and fluorescent chemosensor for Hg²⁺