Abstract
A flexible chemosensor has been developed based on colorimetric and fluorescent dual modes using tetraphenylethylene-centered tetraaniline (TPE4A) for rapid and sensitive detection of hypochlorite anion. The fluorescent probe TPE4A exhibits a unique aggregation-induced emission (AIE) character which is proved by a blue shift of the fluorescent peak from 544 to 474 nm with the water equivalents increasing. With the addition of hypochlorite in solution, the absorbance of the probe changes and the responding fluorescence color can be observed to change from light green to purple. The detection limit of hypochlorite is 1.80 × 10−4 M in solution, and the visual detection limit is 1.27 µg/cm2 with the naked eye for the flexible paper-based chemosensor. The proposed flexible chemosensors show a good selectivity and sensitivity which has great potential for effective detection of hypochlorite anions without any spectroscopic instrumentation.
Highlights
Hypochlorite anion (ClO−) plays an essential role in biological organisms and environmental monitors, which is produced by H2O2 and chloride ions in activated neutrophils [1–5] but is a kind of disinfector which can kill the coronavirus [6–8]
Excessive hypochlorite could lead to diseases and even cancer including cardiovascular diseases, neuron degeneration, and arthritis [9,10]
Many various analytical methods are available for the detection of hypochlorite [11,12]
Summary
Hypochlorite anion (ClO−) plays an essential role in biological organisms and environmental monitors, which is produced by H2O2 and chloride ions in activated neutrophils [1–5] but is a kind of disinfector which can kill the coronavirus [6–8]. Quantitative detection of hypochlorite with highly sensitive and selective methods becomes more and more crucial. Many various analytical methods are available for the detection of hypochlorite (for example, colorimetric and fluorescent chemosensors) [11,12]. Recent reviews have summarized the advances of hypochlorite probes [13,14].
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