A NBD-based selective colorimetric and fluorescent chemosensor for Hg2+
作者： Jin Hoon Kim , Jin Young Noh , In Hong Hwang , Jae Jun Lee , Cheal Kim
DOI: 10.1016/J.TETLET.2013.05.074
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摘要: Abstract A new NBD-based sensor bearing a dipicolylamine derivative, (2-pyridylmethyl)(2-quinolylmethyl)amine (1), was synthesized, and its chromogenic fluorogenic behaviors toward various metal ions were investigated in methanol solution. Chemosensor 1 selectively detected Hg2+ through color change from yellow to colorless. In addition, chemosensor exhibited highly Hg2+-selective ON–OFF fluorescence quenching behavior shown discriminate competing ions, particularly, such as Cu2+, Ag+, Pb2+. The binding mode of 1-Hg2+ found be 1:2 complex formation, based on Job plot 1H NMR titration.
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