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  • Title: Amido-Schiff base derivatives as colorimetric fluoride sensor: Effect of nitro substitution on the sensitivity and color change.
    Author: Ghosh S, Alam MA, Ganguly A, Guchhait N.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2015; 149():869-74. PubMed ID: 26002437.
    Abstract:
    A series of Schiff bases synthesized by the condensation of benzohydrazide and -NO2 substituted benzaldehyde have been used as selective fluoride ion sensor. Test paper coated with these synthetic Schiff bases (test kits) can detect fluoride ion selectively with a drastic color change and detection can be achieved by just using the naked-eye without the help of any optical instrument. Interestingly, the position of -NO2 group in the amido Schiff bases has an effect on the sensitivity as well as on the change of color of species.
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