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  • Title: Zinc(II) and PPi selective fluorescence OFF-ON-OFF functionality of a chemosensor in physiological conditions.
    Author: Ravikumar I, Ghosh P.
    Journal: Inorg Chem; 2011 May 16; 50(10):4229-31. PubMed ID: 21495707.
    Abstract:
    A fluorescent chemosensor based on a quinoline derivative, L(2) (OFF state), selectively senses Zn(2+) by effective chelate-enhanced fluorescence (ON state), which further shows selectivity toward PPi over competing anions like Pi, AMP, and ATP via fluorescence quenching (OFF state) in a 100% aqueous HEPES buffer (pH 7.4). A plausible mode for the selective binding of PPi to 1 has been demonstrated by quantum mechanical density functional theory calculations and high-resolution mass spectrometry analysis.
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