Abstract
A novel coumarinylhydrazone fluorescent probe L was designed and synthesized from 4-(diethylamino)salicylaldehyde, its structure was characterized by NMR, IR. Fluorescence emission spectra showed that in ethanol solution, probe L could form a 1:1 complex L-Cu2+ with Cu2+ to realize the "turn-off" detection of Cu2+ with high specificity and sensitivity (3.7 × 10–7 mol/L). Meanwhile, the complex L-Cu2+ had a specific fluorescence-enhanced response to HPO42− with a detection limits down to 5.6 × 10–7 mol/L and was resistant to the effects of many common anions (NO2−, N3−, CO32−, SO32−, HPO42−, I−, Br−, F−, HCO3−, SO42−, NO3−, Cl−, CH3COO−, Cr2O72−, S2O32−, P2O74−). Detection mechanism could be HPO42− captured Cu2+ of the complex and released the free ligand L. At last, the complex L-Cu2+ was successfully applied to the determination of HPO42− in different environmental water samples, and the spiked recoveries ranged from 98.05% to 108.18% and the relative standard deviations of 0.75% ~ 2.9%, which had good application prospects.
Graphical Abstract
A new coumarin acyl hydrazone fluorescent probe L was designed and synthesized, which could specifically recognize Cu2+ and HPO42- in a relay manner. In addition, the probe had good prospects for practical applications.
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Acknowledgements
The authors are grateful to National Natural Science Foundation of China (No. 21908034) and Natural Science Foundation of Heilongjiang Province (No. LH2021H001).
Funding
This work was supported by National Natural Science Foundation of China (No. 21908034) and Natural Science Foundation of Heilongjiang Province (No. LH2021H001).
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Shukui Pang: Conceptualization, Methodology, Investigation, Visualization, Formal analysis, Writing – original draft. Yanchao Yu & Mianyuan Wu: Conceptualization, Methodology, Resources, Writing – review & editing, Supervision. Xuexue Yan & Canyao Wu: Software, Investigation, Formal analysis. Qiye Liu & Panru Zu: Software, Investigation, Formal analysis.
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Highlights
• Probe L could complete sequential recognition of Cu2+ and HPO42-.
• Probe L had the advantages of excellent specificity, high sensitivity, high immunity to interference and visualization.
• Probe L showed promising prospects for practical applications.
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Pang, S., Yu, Y., Yan, X. et al. Synthesis of Coumarinylhydrazone Fluorescent Probe and its Relay Recognition of Cu2+ and HPO42−. J Fluoresc (2024). https://doi.org/10.1007/s10895-024-03606-y
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DOI: https://doi.org/10.1007/s10895-024-03606-y