A new coumarin based Schiff base fluorescence probe for zinc ion
2021
Arvas, Busra | Ucar, Burcu | Acar, Tayfun | Arvas, Melih Besir | Sahin, Yucel | Aydogan, Feray | Yolacan, Cigdem
Herein, a novel coumarin-based fluorescent probe (FS3) was designed, synthesized, and characterized. It exhibited significant fluorescence quenching in the presence of Zn²⁺ ions. Just a minor alteration occurred in the fluorescence intensity of FS3 in the presence of other metals studied. The limit of detection for the determination of Zn²⁺ by FS3 was calculated to be 3.43 × 10⁻⁹ M. Since the Job’s graph of 1/(F₀–F) and 1/[Zn²⁺] had a linear fit, it was determined that the binding stoichiometry between the FS3 and Zn²⁺ was 1:1. The association constant of the system was found to be 2.39 × 10⁴ M⁻¹ and confirmed by ESI-MS and FT-IR. It was demonstrated that the developed highly reversible sensor system works by performing real sample analysis. Moreover, the FS3 which has shown no toxicity and displayed a strong fluorescence image will act as an efficient and non-destructive sensor for the determination of Zn²⁺ in living organisms.
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