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首页> 外文期刊>Analytical methods >Efficient one-pot synthesis of carbon dots as a fluorescent probe for the selective and sensitive detection of rifampicin based on the inner filter effect
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Efficient one-pot synthesis of carbon dots as a fluorescent probe for the selective and sensitive detection of rifampicin based on the inner filter effect

机译：高效的一锅法合成碳点作为荧光探针，用于基于内部过滤效应选择性和灵敏地检测利福平

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摘要

In this paper, carbon dots (CDs) emitting blue fluorescence were prepared using ammonium citrate and ammonium thiocyanate through a low-cost hydrothermal approach. The synthesized carbon dots with maximum excitation and emission wavelengths at 350?nm and 443 nm, respectively, displayed excitation-independent photoluminescence behavior. The relative quantum yield of the as-prepared carbon dots was measured to be 14%. Importantly, a novel method was designed for rifampicin detection as the fluorescence intensity of carbon dots could be quenched significantly by rifampicin on the basis of the inner filter quenching effect. Under optimal experimental conditions, a satisfactory linear response relation was observed between the fluorescence quenching intensity of the carbon dots and the concentration of rifampicin in the range from 0.43 to 49.0 mg L?1; moreover, the detection limit for rifampicin was as low as 0.13 mg L?1. Therefore, a new method has been successfully established, and it is capable of quantification of rifampicin in real samples.
机译：在本文中，通过低成本的水热法，使用柠檬酸铵和硫氰酸铵制备了发出蓝色荧光的碳点（CD）。分别在350？nm和443nm处具有最大激发和发射波长的合成碳点显示出与激发无关的光致发光行为。所制备的碳点的相对量子产率经测量为14％。重要的是，设计了一种用于利福平检测的新方法，因为基于内部过滤器的淬灭效果，利福平可以显着淬灭碳点的荧光强度。在最佳实验条件下，碳点的荧光猝灭强度与利福平浓度在0.43至49.0 mg L？1之间观察到令人满意的线性响应关系。此外，利福平的检出限低至0.13 mg L？1。因此，已经成功建立了一种新方法，该方法能够定量实际样品中的利福平。

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