The fluorescent probe , based on naphthalimide-modified coumarin, was designed, synthesized, and characterized, which could recognize Cu from other cations selectively and sensitively in HEPES buffer (10 mM, Ph = 7. 4)/CHCN (1:4, V/V). When the probe interacted with Cu, the color and the fluorescent intensity changed obviously and it provided the naked-eye detection for Cu. The recognition mode between them was achieved by Job's plot, IR, MS, SEM, and HNMR. In addition, test strips made from could still interact with Cu in tap water effectively. The limit of detection (LOD) of was 3.5 × 10 M. Additionally, the density functional theory (DFT) calculation method was used to analyze the action mechanism of toward Cu. Importantly, the fluorescent probe could demonstrate favorable selectivity toward Cu in . Thus, was considered to have some potential for application in bioimaging.
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| http://dx.doi.org/10.3389/fchem.2020.00800 | DOI Listing |
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