A new pyrenyl-appended triazole for fluorescent recognition of Hg~(2+) ion in aqueous solution

摘要

A new pyrenyl-appended triazole for fluorescent sensing of Hg~(2+), 1, has been synthesized and characterized. Upon addition of Hg~(2+) to 1 in the acetonitrile aqueous solution, more than 80% of the initial fluorescence intensity of 1 was quenched, which allowed a selective and sensitive fluorescent detection of Hg(II) without any interference from other metal ions. ~1H NMR analysis revealed that the two sulfonamide and triazole groups of 1 played a critical role in the interactions with Hg~(2+) ion, which can be further proved by the density functional theory based theoretical calculation.