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Yellow-fluorescence carbon dots employed for pH sensing and the detection of tigecycline
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  • Jingwen Zhao,
  • Junchen Wang,
  • Linggao Zeng,
  • Sen Zhou,
  • Xiaoming Yang
Jingwen Zhao
Southwest University
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Junchen Wang
Southwest University
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Linggao Zeng
Chongqing Institute for Food and Drug Control
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Sen Zhou
Chongqing Academy of Metrology and Quality Inspection
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Xiaoming Yang
Southwest University

Corresponding Author:[email protected]

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Long-wavelength fluorescence of carbon dots (CDs) show the great importance in multiple fields, especially for the biochemical sensing. Here we proposed one type of CDs doped with nitrogen and sulfur through the hydrothermal method, which exhibited the obvious yel-low-fluorescence in aqueous. Importantly, their fluorescence intensity of CDs decreased with pH decreasing in the acidic range, thus a linear relationship between pH and fluorescence intensity was established, and exhibiting the potential of pH sensing. Additionally, in-troducing tigecycline into CDs resulted in their decreased fluorescence, thus we further established a strategy of detecting tigecycline with the concentration range of 200 μM to 7 nM. Meanwhile, we elucidated the static quenching as the major mechanism for CDs responding tigecycline, which was induced by the formed new complex between CDs and tigecycline. Furthermore, the practicality of the method was verified by examining the recovery of tigecycline in the actual lake-water samples.
27 Aug 20231st Revision Received
30 Aug 2023Assigned to Editor
30 Aug 2023Submission Checks Completed
30 Aug 2023Review(s) Completed, Editorial Evaluation Pending
01 Sep 2023Reviewer(s) Assigned
07 Sep 2023Editorial Decision: Accept