Inorganica Chimica Acta p. 7 - 11 (2018)
Update date:2022-08-11
Topics:
Li, Zheng
Wang, Shujun
Xiao, Liwei
Li, Xiaolong
Shao, Xiaona
Jing, Xuemin
Peng, Xiaoxia
Ren, Lilei
A novel colorimetric probe 2-hydroxy-1-naphthylaldehyde-2-quinoline acylhydra-zone (L) was synthesized and its structure was characterized by FT-IR, 1H NMR, 13C NMR and HRMS method. The sensing ability of the probe towards anions (F?, Cl?, Br?, I?, NO3?, AcO?, HSO4?, H2PO4?, ClO4?) was determined by colorimetric, UV–vis and NMR studies. The results showed that L had an efficient colorimetric sensing ability for fluoride ion by changing color from colorless to yellow. The probe L bound to F? in a 1:2 stoichiometric manner. Furthermore, the binding constant of the complex was 1.37 × 109 M?2 with the detection limit of 8.28 × 10?6 M. The recognition mechanism was attributed to the intermolecular proton transfer between the hydroxyl group of the probe L and the fluoride according to 1H NMR titration method.
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