Abstract
A new fluorogenic calix[4]arene containing one pendent N-dansylcarboxamide group has been synthesized. The ligand demonstrates selective optical recognition of Tl + and Hg 2+ in solvent extraction from aqueous solutions with high content of Na +. Complexation of Tl + and Hg 2+ produces contrasting changes in the fluorescence spectrum of this sensor. Partial cone is the dominant calixarene conformation in the complex with Tl +.
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