Fluorescent sensing platform based on green luminescence carbon dots and AuNPs for clenbuterol detection in pork liver. Issue 14 (21st March 2022)

• Record Type: Journal Article
• Authors: Guo, Ying; Zheng, Min Yan; Zhang, Wei; Hu, Dao Dao
• Is Part Of: RSC advances. Volume 12:Issue 14(2022)
• Page Start: 8683
• Page End: 8690
• Publication Date: 2022-03-21
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d1ra08724j
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Carbon dots (G-CDs) with bright green fluorescence are synthesized by hydrothermal treatment of p -phenylenediamine and glutathione. Employing the G-CDs and AuNPs as sensing platform, a simple fluorescence sensor to detect clenbuterol was established. Abstract : In this paper, water-soluble green fluorescent carbon dots (G-CDs) were prepared using p -phenylenediamine and glutathione (GSH) as the precursors. The G-CDs exhibit excellent optical properties, and the maximum emission wavelength is located at 522 nm (under 410 nm excitation), which greatly overlaps with the absorption spectrum of AuNPs. Consequently, an effective "off–on" fluorescent sensing platform involved in G-CDs and AuNPs for detection of clenbuterol (CLB) was constructed. The fluorescence of G-CDs was strongly quenched by AuNPs due to the inner filter effect (IFE). As CLB was introduced, the quenched fluorescence intensity was recovered due to the specific interaction between the AuNPs and CLB. The recovered fluorescence intensity is linear to CLB concentration in the range of 13–270 ng mL −1 with a low detection limit of 3.75 ng mL −1 . The prepared sensor has been successfully applied for CLB detection in pork liver and could be utilized in food analysis.