Abstract
A novel 1,8-naphthalimide dye with simple structure has been produced by a facile synthetic method for colorimetric and fluorescent sensing of H+ and Cu2+. In CH3CN/H2O (1/1, v/v), the dye could monitor H+ using dual channels (ratiometric absorbance and fluorescence intensity change) from pH 6.2 to 12.0. Meanwhile, in the pH range of 1.9–5.2, the dye could also be used to detect Cu2+ using triple channels [ultraviolet–visible (UV–Vis) absorption, fluorescence intensity reduction, as well as fluorescence blueshift]. The detection limits for Cu2+ evaluated by colorimetric and fluorescent titration were 6.10 × 10−7 and 2.62 × 10−7 M, respectively. The dye exhibited specific selectivity and sensitivity for H+ and Cu2+ over various coexisting metal ions. Moreover, the sensing mechanism of the dye for H+ and Cu2+ was carefully examined.
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This work was supported by the National Natural Science Foundation of China (21074085), Priority Academic Program Development of Jiangsu Higher Education Institutions, and State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials.
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Chen, Y., Tang, T., Chen, Y. et al. Novel 1,8-naphthalimide dye for multichannel sensing of H+ and Cu2+. Res Chem Intermed 44, 2379–2393 (2018). https://doi.org/10.1007/s11164-017-3235-6
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DOI: https://doi.org/10.1007/s11164-017-3235-6