Abstract
Cyanine-based probe-possessing indolium iodide and indole unit were synthesized in two-step with easy available raw material: a potential probe for the cyanide ion detection. The detecting ability of the probe was investigated and confirmed by a visual and instrumental approach. A noticeable color change from orange to colorless obtained only for cyanide ions and other added ions does not impart any changes visually and through UV and Fluorescence technique. To confirm the mechanism of sensing 1H-NMR recorded. From the result, the peak belonging to N-methyl displayed an upfield shift from 4.01 δ ppm to 2.74 δ ppm due to the disappearance of indolium iodide ion and the olefin protons peaks were shifted from 7.19 to 6.17 and 8.70 to 7.20 δ ppm confirms the nucleophilic addition of cyanide ion to the probe. Test kit from filter paper prepared for the real-time monitoring cyanide ion. The prepared strip is effective in detecting cyanide ion with a visual color change.
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The authors thank Acharya Nagarjuna University for providing lab facilities to conduct research work.
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All authors (Mahesh Gosi, Nagaraju Marepu, and Yeturua Sunandamma) made substantial contribution in preparing the manuscript.
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Gosi, M., Marepu, N. & Sunandamma, Y. Cyanine-based Fluorescent Probe for Cyanide Ion Detection. J Fluoresc 31, 1409–1415 (2021). https://doi.org/10.1007/s10895-021-02771-8
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DOI: https://doi.org/10.1007/s10895-021-02771-8