Abstract
A novel BF2–curcumin-based chemosensor 1, namely monopicolinate of BF2–curcumin complex, was designed, synthesized and applied for the detection of Cu2+ in aqueous buffer solution and living cells. Sensor 1 exhibited sensitive naked-eye color change toward Cu2+ from blue to pink in TBS solution and the detection limit was estimated to be 0.12 µM. The selectivity of sensor 1 for Cu2+ was high over competing metal ions (Ag+, Cu+, Hg2+, Mg2+, Ca2+, Co2+, Zn2+, Mn2+, Ni2+, Fe2+ and Fe3+). Based on the experimental results, the sensing mechanism was proposed for the Cu2+ triggered hydrolysis of 1 to BF2–curcumin which has unique chromogenic and fluorogenic properties. Compared with other chemosensors with a similar mechanism, chemosensor 1 had a comparatively large Stokes shift and the emission wavelength was close to NIR. Moreover, cell imaging investigations indicated that sensor 1 has the potential to be applied for practical Cu2+ detection in biological systems.
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We thank the Analytical and Testing Center of Sichuan University for NMR measurements.
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Li, Y., Ji, YX., Song, LJ. et al. A novel BF2–curcumin-based fluorescent chemosensor for detection of Cu2+ in aqueous solution and living cells. Res Chem Intermed 44, 5169–5180 (2018). https://doi.org/10.1007/s11164-018-3416-y
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DOI: https://doi.org/10.1007/s11164-018-3416-y