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Novel Isophthalohydrazide-cDB24C8 cryptand derivative for the selective recognition of fluoride ion: An experimental
Sankar Jyoti Bora1, Rakesh Dutta2, Dhruba Jyoti Kalita2
1Department of Chemistry, Dibrugarh University, Dibrugarh 786004, Assam, India.
Abstract:
A highly selective and sensitive novel Isophthalohydrazide-cDB24C8 cryptand derivative was developed for fluoride recognition at a very low concentration of 2.31 × 10-10 M. The binding was established by UV-Vis, fluorescence and 1H NMR titration. The receptor formed very strong H-bonded complex with fluoride, furnished a sharp new UV-Vis absorption peak at 280 nm which was also supported by the DFT-study. The fluorescence emission spectra showed large quenching up to 79.13% upon addition of fluoride.
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