姜黄素
检出限
姜黄
荧光
化学
线性范围
量子点
猝灭(荧光)
纳米技术
核化学
光化学
色谱法
材料科学
生物化学
物理
医学
量子力学
传统医学
作者
Congjie Pan,Qiaoqiao Wen,Longfei Ma,Xuezhen Qin,Feng Shao
出处
期刊:Analytical Methods
[The Royal Society of Chemistry]
日期:2021-01-01
卷期号:13 (42): 5025-5034
被引量:10
摘要
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 μM 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 μM 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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