Abstract
A novel fluorescent turn-off sensor JM for hypochlorite was synthesized. JM showed a remarkable selectivity for ClO- over diverse competitive analytes, including reactive oxygen species (ROS), via deprotonation reaction. Detection limit for ClO- turned out to be 0.60 μM. Sensor JM successfully determined ClO- in natural water samples with satisfactory recovery. The sensing mechanism of JM to hypochlorite was demonstrated by fluorescent and UV-visible spectroscopy, ESI-mass, NMR titration and TD-DFT calculations.
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