Abstract
A novel fluorescent probe IPY-MAL for thiols was developed based on imidazo[1,5-α]pyridine derivative, which was decorated with a maleimide group. The probe IPY-MAL showed a rapid response (30 s), high sensitivity and selectivity for thiols with a large Stokes shift (140 nm), which was triggered by the Michael addition reaction of thiols toward the C=C double bond of the maleimide group. Moreover, this probe IPY-MAL could quantitatively detect the concentrations of thiols ranging from 0 to 50 μM, and the detection limit was found to be as low as 28 nM. Cell imaging results indicated that the probe IPY-MAL could detect and visualize thiols in the living cells.
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Acknowledgments
The research was supported by University Nursing Program for Young Scholars with Creative Talents in Heilongjiang Province (No. UNPYSCT-2017167), China.
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Chen, S., Hou, P., Wang, J. et al. A highly sensitive fluorescent probe based on the Michael addition mechanism with a large Stokes shift for cellular thiols imaging. Anal Bioanal Chem 410, 4323–4330 (2018). https://doi.org/10.1007/s00216-018-1082-y
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DOI: https://doi.org/10.1007/s00216-018-1082-y