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A new fluorescein-based probe is found to be sensitive and selective for the detection of hypochlorite anion in aqueous buffer solution. The probe displays high water solubility, pH-independent fluorescence, and biocompatibility. A possible detection mechanism is that HOCl oxidizes the CN bond into aldehyde, resulting in bright emission. Results show that the probe has a 7.3 nM detection limit to...
A ratiometric sensor (QA) for detecting Zn2+ with high sensitivity and selectivity was reported. The fluorescence changes of sensor upon the addition of Zn2+ were attributed to the conjugation of internal charge transfer and fluorescence resonance energy transfer mechanisms. There is a good linear relationship between the fluorescence ratio I497nm/I420nm and the concentrations of Zn2+ ranging from...
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