Abstract
A naphthalimide Schiff base fluorescent probe (BSS) was designed and synthesized from 4-bromo-1,8-naphthalic anhydride, and its structure was characterized by 1HNMR, 13CNMR, FTIR, and MS. Fluorescence emission spectra showed that probe BSS could realize the “turn-off” detection of Cu2+ in acetonitrile solution, detection process with strong specificity and excellent anti-interference of other metal ions. In the fluorescence titration experiments, fluorescence intensity of BSS showed a good linear relationship with the Cu2+ concentration (0–10 µmol/L), and the detection limit was up to 7.0 × 10− 8 mol/L. Meanwhile, BSS and Cu2+ could form a 1:1 complex (BSS-Cu2+) during the reaction process. Under the same detection conditions, complex BSS-Cu2+ had specific fluorescence recovery properties for H2PO4− and the whole process was not only fast (6 s) but also free of interference from other anions, with a detection limit was as low as 5.7 × 10− 8 mol/L. In addition, complex BSS-Cu2+ could be successfully applied to the detection of H2PO4− in actual water samples, which with excellent application prospects.
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Acknowledgements
The authors express appreciation to the School of Materials Science and Chemical Engineering, Harbin University of Science and Technology and Institute of Petrochemistry Heilongjiang Academy of Sciences for supporting this investigation. The authors would like to thank the anonymous reviewers and he editors.
Funding
This work was supported by National Science Foundation of China (22278098, 22008045) and Natural Science Foundation of Heilongjiang Province (No. LH2021H001, LH2023B013).
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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. Panru Zu & Canyao Wu: Software, Investigation, Formal analysis. Wenju Wu: Writing – review & editing. Jun You: Conceptualization, Methodology, Resources, Writing – review & editing, Supervision.
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Pang, S., Yu, Y., Wu, W. et al. Synthesis and Application of 1,8-Naphthalimide Derivatives Fluorescent Probe for Sequential Recognition of Cu2+ and H2PO4−. J Fluoresc (2024). https://doi.org/10.1007/s10895-024-03692-y
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DOI: https://doi.org/10.1007/s10895-024-03692-y