A new naphthalene-containing triazolophane for fluorescence sensing of mercury(II) ion

• Cyclic and acyclic naphthalene-containing triazoles were synthesized.
• Both receptors show distinctive fluorescent sensing to Hg(II).
• Cyclic receptor shows better sensitivity and selectivity than acyclic compound.
• The binding mechanism was investigated by 1H NMR spectrum and DFT calculation.

A new naphthalene-containing macrocyclic triazole (1) and its acyclic compared compound (2) have been synthesized and characterized. In acetonitrile and acetonitrile aqueous solutions, 1 and 2 showed good fluorescence sensing ability to Hg2+ over other metal ions, with 1 exhibiting better sensitivity and selectivity than 2 owing to its macrocyclic effect. 1H NMR titrations and DFT calculation results showed that the N atoms of triazole and O atoms of the ether groups in 1 and 2 participate in binding during complexation with Hg2+.

A new naphthalene-containing macrocyclic triazole and its acyclic compared compound for fluorescence recognition of Hg2+ are reported.Figure optionsDownload as PowerPoint slide