期刊
ANALYTICAL METHODS
卷 13, 期 42, 页码 5025-5034出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ay01490k
关键词
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资金
- Zhongjing Scholars Research Funding of Henan University of Chinese Medicine [00104311-2021-1-12]
Curcumin, an active ingredient in Curcuma longa, can be effectively detected using novel water-dispersible SiQDs through fluorescent and colorimetric modes, showing a good linear relationship and low detection limit.
Curcumin, an active ingredient in Curcuma longa, which possesses good biological and pharmacological activities, is effective in treating many diseases. Developing simple and sensitive methods for the detection of curcumin is of great significance. In this study, novel water-dispersible silicon quantum dots (SiQDs), which can sensitively respond to curcumin through fluorescent and colorimetric dual modes were synthesized via a one-step hydrothermal treatment of N-[3-(trimethoxysilyl) propyl]-ethylenediamine (DAMO) and p-phenylenediamine. The fluorescence of SiQDs could be remarkably quenched by curcumin via the inner filter effect (IFE) and static quenching effect (SQE). A good linear relationship was obtained in the range of 0.25-75 mu M with a detection limit of 91 nM. More interestingly, curcumin could also be visually detected using SiQDs via an obvious color change of the solution from pale yellow to orange-red, which allows the establishment of a sensitive colorimetric method for curcumin detection in the linear range of 0.05-57.5 mu M with a detection limit of 32 nM. The proposed method was successfully applied to detect curcumin in health care products and spices. Notably, to realize rapid and convenient visual detection of curcumin, a paper sensor was also fabricated.
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