Abstract
A new type of multifunctional bis(salamo)-based fluorogenic sensor H2BS was designed and synthesized. Under the action of VDMF: VH2O = 9: 1, the fluorogenic sensor can identify Cu2+ and B4O72−, in which N and O atoms can serve as binding sites for Cu2+ and B4O72−, the stoichiometry of the binding of the fluorogenic sensor H2BS and Cu2+ has been confirmed by titration experiment, working curve, ESI-MS analysis and DFT calculation. The pH response experiment also confirmed that the fluorogenic sensor can recognize Cu2+ and B4O72− in the pH range applicable to the physiological environment. The minimum detection limit of H2BS for Cu2+ and B4O72− recognition reaches 1.12 × 10−7 and 5.56 × 10−8 M, and the fluorogenic sensor H2BS has been successfully applied to Cu2+ detection in actual water samples, and the test strip for detecting Cu2+ and B4O72− was obtained. Meanwhile, the success of the test strip experiment made the fluorogenic sensor H2BS to recognize Cu2+ and B4O72− widely used in daily life.
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This work was supported by the National Natural Science Foundation of China (21761018), which is gratefully acknowledged.
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Su-Xia Gao: Data curation, Formal analysis, Investigation, Methodology, Project administration.
Xin Xu: Formal analysis, Investigation, Writing-original draft.
Yang Zhang: Formal analysis, Investigation.
Wen-Kui Dong: Conceptualization, Funding acquisition, Resources, Supervision.
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Highlights
1. A new bis(salamo)-based fluorogenic sensor H2BS for recognition of Cu2+ and B4O72- was synthesized.
2. H2BS can be used to quantitatively detect Cu2+ content in tap water.
3. H2BS test paper used to quickly identify Cu2+ and B4O72- has been prepared.
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Gao, SX., Xu, X., Zhang, Y. et al. A Bis(Salamo)-Based Fluorogenic Sensor for Highly Selective and Sequential Recognition of Cu2+ and B4O72− Ions in Semi-Aqueous Medium. J Fluoresc 31, 817–833 (2021). https://doi.org/10.1007/s10895-021-02717-0
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DOI: https://doi.org/10.1007/s10895-021-02717-0