A novel ratiometric fluorescent sensor for Ag+ based on two fluorophores
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Updated: Feb 12, 2026

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Published on: July 25, 2025
Ming Jun Cen1, Tao Chang1, Yao Bing Yin1
1College of Materials Science and Engineering, Hebei University of Engineering, Handan 056038, People's Republic of China.
Abstract:
A novel ratiometric fluorescent probe BCB was reported for the first time for the sensitive and selective analysis of Ag+ based on two Boradiazaindacene (BODIPY) as both the reference fluorophore and recognition part. Upon the addition of Ag+ ions, a strong fluorescence emission at 570 nm from recognition BODIPY would be appeared, whereas the fluorescence of the other BODIPY at 535 nm would be a constant reference fluorescence signal. As a result, the ratio of fluorescence intensity (λ570/λ535) was changed from 0.16 to 1.0. And the selectivity of BCB towards Ag+ over other metal ion was excellent. Other metal ions, such as Cd2+, Cu2+, Fe3+, Hg2+, Mg2+, Ni2+, Pb2+ and Zn2+ showed negligible changes in the both absorption and fluorescence spectra of BCB.
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