Detection of mercury(II) and glutathione using a carbon dots-based “off-on” fluorescent sensor and the construction of a logic gate

Li, Xin; Hu, Anqi; Xiong, Yi; Yang, Taiqun; Ma, Chaoqun; Li, Lei; Gao, Hui; Zhu, Chun; Zhang, Wei; Cai, Zhongyu

doi:10.1007/s00216-023-04517-w

Cited by 12 publications

(1 citation statement)

References 44 publications

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“…Hu and coworkers developed sulfur-doped carbon dots (S-C-dots) and the S-C-dots exhibited a distinct pHsensitive feature and the intensity of PL increased linearly in the pH range from 3 to 9 [38]. CDs perform better when compared with traditional methods such as capillary electrophoresis and HPLC due to the superiority of good water solubility, low cost, and biocompatibility [39,40]. However, most CDs suffer from some drawbacks including single sensing platform, high detection limits and narrow linear range [41,42].…”

Section: Introductionmentioning

confidence: 99%

Green fluorescent carbon dots for sensing of quercetin and pH and cell imaging

Zhang,

Cheng,

Zhang

2023

Luminescence

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Green fluorescent carbon dots (G‐CDs) were fabricated from Coptis chinensis directly via one‐step hydrothermal treatment for the determination of quercetin (QCT) and pH sensing. The obtained G‐CDs have low cytotoxicity, good photostability and excellent water solubility. The optimal excitation wavelength and emission wavelength were 480 and 530 nm. A remarkable emission reduction displayed when QCT was added to the G‐CDs and the linear detection range is 0–200 μM, the limit of detection is 4.41 nM. The proposed method was applied to the determination of QCT in Haerbin beer products with satisfactory successful recovery. Furthermore, the G‐CDs exhibited sensitive changes to pH and two fluorescent pH sensors in the linear ranges of 2.0–6.0 and 6.0–11.0 were constructed based on this. They also provide a feasible method to measure the pH value of real water samples. Importantly, the fluorescent sensor has been extended to detect QCT in yeast cell, demonstrating the G‐CDs present potential biosensing application prospect.

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