Abstract
A novel Schiff base fluorescent probe (E)-N'-((2-butyl-6-hydroxy-1,3-dioxo-2,3-dihydro-1H-benzo[de]isoquinolin-5-yl)methylene)furan-2-carbohydrazide (NFP) was prepared via a simple condensation strategy. NFP displayed high selectivity and rapid response (30 s) toward Zn2+ along with a remarkable fluorescence enhancement in DMSO/H2O solution (9/1, v/v, pH 7.4, HEPES buffer, 0.2 mM). Limit of detection (LOD) of NFP for Zinc ions was determined to be 39 nM, which was much lower than the WHO standard (76.0 μM). Binding ratio of NFP with Zn2+ ions was calculated to be 1:1 using job's plot analysis and the association constant (Ka) of NFP–Zn2+ was 1.18 × 105 M−1 on the basis of fluorometric titration. The plausible complexation mode of NFP with Zn2+ ions was demonstrated by the density functional theory (DFT), 1H NMR titration and IR spectrum. The good detection performance of NFP for Zn2+ was successfully reconfirmed by the detection of Zn2+ in real water samples. Furthermore, NFP-coated test strips were easily prepared and used for quickly and qualitatively monitoring Zn2+ ions in a visible manner.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.