Abstract
A novel fluorescent probe SHK for Zn2+ detection was designed based on the hydrazone Schiff base, successfully synthesized by Suzuki coupling and condensation reactions. The probe SHK in DMSO/H2O showed extremely weak fluorescence. However, the solution exhibited an intensive yellow-green emission with the introduction of Zn2+. In contrast, negligible fluorescence change was observed when other metal ions were added, suggesting a high selectivity of SHK for Zn2+ detection. The Job’s Plot analysis revealed that a 1:1 stoichiometric adduct SHK-Zn2+ formed during the Zn2+ sensing. The binding constant of the complex was determined to be 184 M− 1, and the detection limit for Zn2+ was calculated to be 112 µM. Moreover, the probe SHK achieved selective fluorescence sensing for Zn2+ on test strips, which guaranteed its practical application prospect.
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Acknowledgements
This work is supported by the Natural Science Foundation of Hainan Province (No. 220RC591) and Students Research Foundation of Hainan Normal University (No. S202211658037).
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Natural Science Foundation of Hainan Province (No. 220RC591) and Students Research Foundation of Hainan Normal University (No. S202211658037).
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Guo Xu: Performed the experiments; Analyzed and interpreted the data; Contributed reagents, materials, analysis tools or data; Wrote the paper. Shu-Jie Ma: Performed the experiments; Contributed reagents, materials, analysis tools or data. Hua-Hong Zhang: Performed the experiments; Analyzed and interpreted the data. Jing Jing: Performed the experiments. Xing-Han Chen: Contributed reagents, materials, analysis tools or data. Xiao-Peng Zhang: Conceived and designed the experiments; Analyzed and interpreted the data; Wrote the paper. All authors reviewed the manuscript.
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Xu, G., Ma, SJ., Zhang, HH. et al. A Fluorescent Probe Based on the Hydrazone Schiff Base for the Detection of Zn2+ and its Application on Test Strips. J Fluoresc 33, 1183–1189 (2023). https://doi.org/10.1007/s10895-022-03140-9
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DOI: https://doi.org/10.1007/s10895-022-03140-9