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A simple coumarin-based fluorescent probe for specific detection of cysteine over homocysteine and glutathione

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Abstract

In this work, we designed and synthesized 3-cyano-2-oxo-2H-chromen-7-yl acrylate as a simple and effective probe 1, which is capable of detecting cysteine (Cys) over other biothiols, such as homocysteine and glutathione. Remarkably, with the addition of cysteine, the 125-fold increase in fluorescence intensity of probe 1 was observed at 450 nm with excitation at 413 nm and 5 min incubation time. Furthermore, it is more important that probe 1 possesses the detection limit of 80 nM, and there is good linear relationship between fluorescence intensity and concentration of Cys from 0 to 100 μM. Thus, these made a powerful safeguard for the detection of Cys in the biological system. Simultaneously, probe 1 showed low toxicity and could be used in living cell imaging.

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Acknowledgements

This work was supported by the Natural Science Foundation of Hebei Province (No. B2016405026), Young Elitist Foundation of Hebei Province (No. BJ2016003), Guidance Projects of Science and Technology of Zhangjiakou City (No. 1621122H) and Guide Projects of Department of Education of Hebei Province (No. Z2017026).

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Correspondence to Yan-Fei Kang.

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Qiao, H., Meng, Y., Zhang, Y. et al. A simple coumarin-based fluorescent probe for specific detection of cysteine over homocysteine and glutathione. Chem. Pap. 72, 1461–1466 (2018). https://doi.org/10.1007/s11696-018-0401-2

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  • DOI: https://doi.org/10.1007/s11696-018-0401-2

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