Add time:08/19/2019         Source:sciencedirect.com

Nowadays compounds showing aggregation-induced emission enhancement (AIEE) are extensively studied due to their huge range of applications in material science. AIEE and the anion recognition ability of 2-hydroxyquinoline-3-carbaldehyde (1) were explored. Unique AIEE phenomenon is observed in CH3CN with water as the cosolvent and the highest emission was noted in the solvent volume ratio 2:8 (CH3CN: H2O). The compound is a selective time dependent turn on fluoride ion sensor in acetonitrile medium with a distinct color change from colorless to yellow, fabricating it as a visible sensor. Ion sensing ability was monitored through UV–vis, steady state emission, life time studies and 1H NMR spectroscopy. The limit of detection of fluoride ion is 4.09 × 10−6 M. Moreover the compound exhibited notable quenching of fluorescence intensity with bovine serum albumin. Thus small molecule like the quinoline motif can be used in extensive applications in the scientific research.

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