- Turkish Journal of Chemistry
- Vol: 34 Issue: 5
- Convenient synthesis and anion recognition property of acylhydrazone-based molecular tweezer recepto...
Convenient synthesis and anion recognition property of acylhydrazone-based molecular tweezer receptors
Authors : Hai-xian Ren, Ming-gen Zhao, Ying-jin Wang
Pages : 731-737
Doi:10.3906/sag-1209-12
View : 10 | Download : 3
Publication Date : 9999-12-31
Article Type : Makaleler
Abstract :Three acylhydrazone-based compounds were designed as novel neutral sensors for anions, and synthesized by simple steps in good yields. Their anion recognition properties were studied by UV-vis and 1H-NMR spectroscopy. The results showed that the receptors 1, 2, and 3 all had a better selectivity for F- and CH3COO-, but no evident binding with Cl-, Br-, I-, NO3-, H2PO4-, or HSO4-. The results indicated that anion recognition was achieved via convergent hydrogen bond interactions from acylhydrazone functionality on the side arms. The UV-vis data indicated that a 1:1 stoichiometry complex was formed between compounds 1, 2, or 3 and anions. The binding and selectivity were also tuned by the change of the place of the nitro group attached to the phenyl. Moreover, receptor 3 can act as the colorimetric sensor for such anions as F- and CH3COO-, and the recognition mechanism and binding mode were discussed.Keywords : Anion recognition, molecular tweezer, acylhydrazone