Abstract
A highly selective turn-on fluorescent and naked-eye colourimetric dual-channel probe for cyanide anions (CNˉ) has been designed and characterized. In the mixed solution (DMSO / H2O, 9:1, v / v), only CNˉ could cause an increase in the UV absorption intensity and the corresponding fluorescence intensity increased, and other anions had no significant effect on the probe. After treatment with cyanide in the probe solution, the solution showed a noticeable colour change, from light yellow to purple. Moreover, a fluorescence spectrophotometer can be used to observe that the fluorescence intensity of the solution is significantly enhanced. The response of the colourimetric and fluorescent dual-channel probe to CNˉ was attributed to nucleophilic addition, and the mechanism was determined by 1H NMR spectroscopy. In addition, this probe was used to detect CNˉ in actual water samples, including river water, drinking water, and tap water. The spiked CNˉ recovery rate is very high (97.2%-100.06%), and analytical precision is also very high (RSD < 2%), which shows its feasibility and reliability for detecting cyanide ions in actual water samples.
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The data sets used and/or analyzed during the present study are available from the corresponding author on reasonable request.
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Acknowledgements
This work was supported by the Science and Technology Program of Gansu Province (18YF1GA054) and the Program for the Excellent Team of Scientific Research in the Lanzhou Jiaotong University (201706), both of which are gratefully acknowledged.
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This work was supported by the Science and Technology Program of Gansu Province (18YF1GA054) and the Program for the Excellent Team of Scientific Research in the Lanzhou Jiaotong University (201,706).
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All authors contributed to the study conception and design. Data collection and analysis were performed by all authors. The first draft of the manuscript was written by Ya Wu and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Wu, Y., Ding, WM., Li, J. et al. A Highly Selective Turn‐on Fluorescent and Naked‐eye Colourimetric Dual‐channel Probe for Cyanide Anions Detection in Water Samples. J Fluoresc 31, 437–446 (2021). https://doi.org/10.1007/s10895-020-02677-x
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DOI: https://doi.org/10.1007/s10895-020-02677-x