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A Fluorescent "Turn-off" Probe for the Determination of Curcumin Using Upconvert Luminescent Carbon Dots.
Journal of Fluorescence ( IF 2.6 ) Pub Date : 2020-08-19 , DOI: 10.1007/s10895-020-02590-3
Chenhong Yu 1 , Qi Zhuang 1 , Hanyue Cui 1 , Li Li 1 , Yaping Ding 1 , Jiaxin Lin 1 , Yingchun Duan 1
Affiliation  

This work established a novel and simple method for quantitative determination of curcumin by developing a “turn-off” fluorescence probe based on upconvert luminescent carbon dots (p-CDs). The carbon dots were synthesized with p-aminobenzoic acid (PABA) and ethanol by solvothermal method and had specific up-conversion luminescence properties which could be applied in other sensing fields. The sensing mechanism of this fluorescent probe was based on the inter filter effect (IFE) between p-CDs and curcumin. As the concentration of curcumin increased, the fluorescence of p-CDs could be selectively quenched. Under the optimal conditions, the fluorescence quenching intensity of p-CDs had a good linear relationship with curcumin in the range of 0.4–45 µΜ and the detection limit was 0.133 µM. In addition, the fluorescent “turn-off” probe constructed with p-CDs exhibited high accuracy and recovery in the analysis of real sample curry powder, indicating that the fluorescence “turn-off” probe had potential application for the detection of curcumin in the complex matrixes.



中文翻译:

使用上转换荧光碳点测定姜黄素的荧光“关闭”探针。

这项工作通过开发基于上转换发光碳点(p-CD)的“关闭”荧光探针,建立了定量测定姜黄素的新颖,简单的方法。碳点由对氨基苯甲酸(PABA)和乙醇通过溶剂热法合成,具有特定的上转换发光特性,可应用于其他传感领域。该荧光探针的传感机制是基于p-CD与姜黄素之间的互滤效应(IFE)。随着姜黄素浓度的增加,p-CD的荧光可以被选择性地猝灭。在最佳条件下,p-CD的荧光猝灭强度与姜黄素具有良好的线性关系,范围为0.4-45 µM,检出限为0.133 µM。此外,

更新日期:2020-08-20
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