Novel Coumarin-Based Fluorescent Probes for Detecting Fluoride Ions in Living Cells

doi:10.6023/A17010029

Acta Chim. Sinica ›› 2017, Vol. 75 ›› Issue (4): 383-390.DOI: 10.6023/A17010029 Previous Articles Next Articles

Article

新型香豆素类氟离子荧光探针的合成及细胞成像研究

王少静, 李长伟, 李锦, 陈邦, 郭媛

西北大学化学与材料科学学院合成与天然功能分子化学教育部重点实验室西安 710127

投稿日期:2017-01-19 发布日期:2017-03-07
通讯作者: 郭媛,E-mail:guoyuan@nwu.edu.cn E-mail:guoyuan@nwu.edu.cn
基金资助:
项目受国家自然科学基金（Nos.21472148，21072158）、陕西省留学人员科技活动择优资助项目（No.20151190）和西北大学优秀青年学术骨干支持计划资助.

Novel Coumarin-Based Fluorescent Probes for Detecting Fluoride Ions in Living Cells

Wang Shaojing, Li Changwei, Li Jin, Chen Bang, Guo Yuan

Key Laboratory of Synthetic and Natural Functional Molecular Chemistry, Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710127

Received:2017-01-19 Published:2017-03-07
Contact: 10.6023/A17010029 E-mail:guoyuan@nwu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Nos. 21472148, 21072158), the Preferential Financing of Science and Technology Activities in Returned Overseas Graduates in Shaanxi Province (No. 20151190) and the Academic Back-bone of Northwest University Outstanding Youth Support Program.

1. Novel Coumarin-Based Fluorescent Probes for Detecting Fluoride Ions in Living Cells.PDF(1725KB)

Abstract

Fluoride, the smallest anion, is one of the most important anions in the human body which is involved in many diseases and many life activities can be displayed by its situation. It is necessary to detect fluoride ions and determine its concentration in organism. Compared to the traditional detection methods, fluorescence probes exhibit high sensitivity, high selectivity and potential for real-time detection. Because coumarin derivatives have strong emission in the visible region, high quantum yield, high photostability and excellent bioactivity, we choose them as fluorophore to prepare new fluorescent probes. Based on the mechanism of intramolecular charge transfer (ICT), the fluorescent probes CS1, CS2 and CS3 that are coumarin-based derivatives were designed, synthesized and utilized in fluoride ions detection. Their structures were confirmed by ¹H NMR, ¹³C NMR, IR and HRMS. Meanwhile, the crystals of CS3 were obtained by slow evaporation of an ether solution at room temperature over a period of a few days. The detection limits of CS1, CS2 and CS3 for fluoride ions were respectively determined as 21.77, 3.52 and 1.99 μmol/L, indicating that probes have a good sensitivity to the detection of fluoride. The selectivity experiment results demonstrated that the three probes were highly selective for fluoride ions over other competitive. The recognition mechanism of the fluorescent response to fluoride ions was verified by HRMS and NMR experiment in this work. A lot of detailed experiment results indicated that the fluorescent response of probes to fluoride ions attributed to the specific fluoride promoted Si-O cleavage. The study of the effect of probes on viability of cells were carried out using the methylthiazolyldiphenyl-tetrazolium bromide (MTT) assay. The experimental results indicated that the three probes had low cytotoxicity. Then the three probes were successfully used to fluorescent detect and image fluoride ions in MCF-7 cells by fluorescence spectrum and confocal fluorescence microscopic imaging, respectively.

Key words: coumarin, fluoride ions, fluorescent probe, intramolecular charge transfer, cell imaging

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Wang Shaojing, Li Changwei, Li Jin, Chen Bang, Guo Yuan. Novel Coumarin-Based Fluorescent Probes for Detecting Fluoride Ions in Living Cells[J]. Acta Chim. Sinica, 2017, 75(4): 383-390.

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新型香豆素类氟离子荧光探针的合成及细胞成像研究

Novel Coumarin-Based Fluorescent Probes for Detecting Fluoride Ions in Living Cells

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