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- Title
Facile high-quantum-yield sulfur-quantum-dot-based photoluminescent probe for nifedipine detection.
- Authors
Sheng, Yilun; Huang, Zhongnan; Chen, Yaling; Guo, Xiaoyun; Chen, Lan; Peng, Huaping; Chen, Wei
- Abstract
Monitoring of dihydropyridine drugs, such as nifedipine (NIF), has attracted considerable attention owing to the side effects arising from the consumption of such drugs. Herein, a highly sensitive and facile fluorescence-sensing platform based on a high-quantum-yield sulfur quantum dot (SQDs) probe for NIF detection is proposed. Based on the principle of the inner filter effect, the rapid detection of NIF with high sensitivity is successfully realized on the basis of the change in the fluorescence signal due to the quenching effect of NIF on SQDs. The results show a good linear relationship between the NIF concentration and fluorescence intensity within the range of 5–150 μmol/L, with a low detection limit of 1.63 μmol/L (S/N = 3). Moreover, because no surface modification or establishment of any coupling between the receptor and the fluorophore is necessary, this approach provides considerable flexibility and simplicity for the construction of a fluorescence sensor and substantially reduces the detection time. A systematic investigation was conducted to verify the applicability of this method for the analysis of pharmaceutical components in NIF tablets. This study not only promotes the design and development of a fluorescence analysis platform for NIF detection, but also facilitates the fabrication of novel SQD-based fluorescence-sensing systems for the molecular detection of drugs.
- Subjects
NIFEDIPINE; QUANTUM dots; FLUORIMETRY; DIPYRRINS; DRUG monitoring; DETECTION limit
- Publication
Analytical & Bioanalytical Chemistry, 2022, Vol 414, Issue 26, p7675
- ISSN
1618-2642
- Publication type
Article
- DOI
10.1007/s00216-022-04297-9