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  • Title: Indole-azadiene conjugate as a colorimetric and fluorometric probe for selective fluoride ion sensing.
    Author: Shiraishi Y, Maehara H, Hirai T.
    Journal: Org Biomol Chem; 2009 May 21; 7(10):2072-6. PubMed ID: 19421444.
    Abstract:
    An indole-azadiene conjugate (1), synthesized by facile one-step condensation, behaves as a highly selective probe for detection of fluoride ion both in colorimetric and fluorometric analyses. The probe 1 shows F(-)-selective color change from colorless to yellow and appearance of green fluorescence. 1H NMR analysis and ab initio calculation reveal that the F(-)-induced colorimetric and fluorometric responses of 1 are simply driven by hydrogen bonding interaction between the indolic NH protons and F(-).
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