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  • Title: Intramolecular proton transfer through the adjoining π-conjugated system in Shiff base: application for colorimetric sensing of fluoride anion.
    Author: Yu X, Zhang P, Li Y, Zhen X, Geng L, Wang Y, Ma Z.
    Journal: Mater Sci Eng C Mater Biol Appl; 2014 Jul 01; 40():467-71. PubMed ID: 24857515.
    Abstract:
    In this paper, a new kind of phenol-based chemsensor L2 comprised of a Schiff base and azo groups was rationally designed and synthesized. It could selectively recognize fluoride anion among tested anions such as F(-), AcO(-), H2PO4(-), Cl(-), Br(-), and I(-) with obvious color changes from yellow to fuchsia. The intramolecular PT (proton transfer) in L1 and L2 was responsible for the sensing ability, which was certified by the (1)H NMR and Uv-vis experiments.
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