Volume 41, Issue 24 pp. 3677-3683
Comprehensive Report

Yellow-Fluorescence Carbon Dots Employed for pH Sensing and Detection of Tigecycline

Jingwen Zhao

Jingwen Zhao

College of Pharmaceutical Sciences, Southwest University, Chongqing, 400715 China

Chongqing Academy of Metrology and Quality Inspection, Chongqing, 401121 China

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Junchen Wang

Junchen Wang

College of Pharmaceutical Sciences, Southwest University, Chongqing, 400715 China

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Linggao Zeng

Linggao Zeng

NMPA Key Laboratory for Quality Monitoring of Narcotic Drugs and Psychotropic Substances, Chongqing Institute for Food and Drug Control, Chongqing, 401121 China

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Sen Zhou

Corresponding Author

Sen Zhou

Chongqing Academy of Metrology and Quality Inspection, Chongqing, 401121 China

E-mail: [email protected]; [email protected]Search for more papers by this author
Xiaoming Yang

Corresponding Author

Xiaoming Yang

College of Pharmaceutical Sciences, Southwest University, Chongqing, 400715 China

NMPA Key Laboratory for Quality Monitoring of Narcotic Drugs and Psychotropic Substances, Chongqing Institute for Food and Drug Control, Chongqing, 401121 China

E-mail: [email protected]; [email protected]Search for more papers by this author
First published: 11 September 2023

Dedicated to the Special Issue of Carbon Dots Based Functional Materials.

Comprehensive Summary

Long-wavelength fluorescence carbon dots (CDs) show 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 obvious yellow-fluorescence in aqueous solution. Importantly, the fluorescence intensity of CDs decreased with pH decreasing in the acidic range, thus a linear relationship between pH and fluorescence intensity was established, exhibiting the potential of pH sensing. Additionally, introducing 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. image

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