Herein, an ultrasensitive electrochemiluminescence (ECL) sensor was established for the determination of dopamine using sulfur quantum dots (SQDs) as the luminophore. The detection mechanism highlights how dopamine can be oxidized into dopamine quinone (DQ) and quenches the ECL signal of SQDs. Under the optimized experimental conditions, the ECL signal of SQDs was used for the detection of dopamine in the linear range of 1 × 10−10 to 1 × 10−3 M with a detection limit of 2.5 × 10−11 M (S/N = 3). The proposed method has excellent specificity, a low detection limit, and high sensitivity when applied in the analysis of real samples and is applicable in the development of novel ECL luminophores as well as the improvement of human health.

中文翻译：

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基于硫量子点与多巴胺醌之间共振能量转移的阴极电化学发光检测多巴胺


在此，建立了一种超灵敏电化学发光 （ECL） 传感器，用于使用硫量子点 （SQD） 作为发光团测定多巴胺。该检测机制突出了多巴胺如何被氧化成多巴胺醌 （DQ） 并淬灭 SQD 的 ECL 信号。在优化的实验条件下，SQDs 的 ECL 信号用于检测 1 × 10-10 至 10-3 M 线性范围内的多巴胺×检测限为 2.5 × 10-11 M （S/N = 3）。该方法在应用于真实样品分析时具有优异的特异性、低检出限和高灵敏度，适用于新型 ECL 发光团的开发以及改善人类健康。