纳米探针
化学
荧光
检出限
碳纤维
青霉胺
分析化学(期刊)
核化学
材料科学
色谱法
有机化学
光学
复合数
物理
复合材料
作者
Maolin Wu,Nan Wang,Zihan Lin,Xingguang Su
标识
DOI:10.1007/s00216-021-03552-9
摘要
A simple and rapid ratiometric fluorescent sensing system for d-penicillamine (D-PA) determination is developed based on yellow carbon dots (Y-CDs) combined with thiochrome (oxVB1) for the first time. The oxidization of thiamine (VB1) can be catalyzed by Alkaline-hydrolyzed artemisinin (a-ART) to form oxVB1, which leads to the occurrence of fluorescence emission peak at 466 nm. Furthermore, the oxidation reaction between a-ART and VB1 could be inhibited by D-PA, and accompanied with the decrease of fluorescence at 466 nm. However, the fluorescence peak of Y-CDs as an internal reference at 566 nm was almost unchanged. The ratiometric signal changes contributed to a robust and sensitive D-PA sensing. Under the optimal condition, a good linear response for the D-PA detection was obtained in the ranges of 0.5–50 μM with a detection limit of 0.33 μM. In addition, Y-CDs and thiochrome-based sensing system was applied to D-PA determination in real samples and obtained acceptable results.Graphical abstract We developed a new carbon dots/thiochrome fluorescent nanoprobe for ratiometric fluorescence sensing of d-penicillamine.
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