FRET-based ratiometric fluorescent probe for Cu with a new indolizine fluorophore

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作者单位: School of Chemistry and Pharmaceutical Engineering, Taishan Medical University, Taian, Shandong 271016, PR China

摘要: A new fluorophore indolizine was synthesized and used as a donor to construct FRET system. The chemodosimeter shows a large Stokes shifts (193 nm), high sensitivity, and high selectivity. The probe can quickly (10 min) detect Cu2+ effectively in a wide pH range from 5 to 12 and with a detection limit as low as 9.1 × 10−9 M. Furthermore, it could be used for imaging Cu2+ in living Glioma cells which demonstrated its value of practical applications in biological systems.Graphical abstract

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