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  • Title: An easy prepared dual-channel chemosensor for selective and instant detection of fluoride based on double Schiff-base.
    Author: Leng YL, Zhang JH, Li Q, Zhang YM, Lin Q, Yao H, Wei TB.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2016 Oct 05; 167():116-121. PubMed ID: 27262660.
    Abstract:
    A colorimetric and fluorescent dual-channel fluoride chemosensor N,N'-bis (4-diethylaminosalicylidene) hydrazine (sensor S) bearing two imine groups has been designed and synthesized. This structurally simple probe displays rapid response and high selectivity for fluoride over other common anions (Cl(-), Br(-), I(-), AcO(-), H2PO4(-), HSO4(-), ClO4(-), CN(-) and SCN(-)) in a highly polar aqueous DMSO solution. Mechanism studies suggested that the sensor firstly combined with F(-) through hydrogen bonds and then experienced the deprotonation process at higher concentrations of F(-) anion to the two Ar-OH groups. The detection limit was 5.78×10(-7)M of F(-), which points to the high detection sensitivity. Test strips based on sensor S were fabricated, which could act as a convenient and efficient F(-) test kit to detect F(-) for "in-the-field" measurement.
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