Functionalized Carbon Dots of Benzothiazine Derivatives for Detection of Quercetin in Ginkgo Biloba Tea

doi:10.7503/cjcu20200248

Abstract

Abstract: Functionalized carbon dots of benzothiazine(CDs-BT) derivatives were developed for the rapid and selective detection of quercetin(QCT). Using citric acid and ethylenediamine as raw materials, CDs rich in carboxyl groups on the surface were synthesized by one-step hydrothermal method, and benzothiazine derivatives were modified on the surface of the CDs to construct CDs-BT for detecting QCT. The CDs-BT was characterized by means of TEM, XPS and FTIR. Central composite design(CCD) and response surface method(RSM) were used to evaluate and optimize the operating parameters during the inspection process. Under the optimal operating conditions, the detection linear range of QCT is 2-22 μmol/L, and the detection limit is 0.717 μmol/L. Further research found that the quenching mechanism of CDs-BT fluorescence by QCT is static quenching. CDs-BT can also be used to detect QCT in Ginkgo biloba tea with a recovery rate of 97.4%-101.6%.

Key words: Carbon dot, Benzothiazine derivative, Surface modification, Fluorescence quenching, Quercetin

CLC Number:

O657.3

TrendMD:

YAN Fanyong, SUN Zhonghui, PANG Jiping, JIANG Yingxia, CHEN Yuan. Functionalized Carbon Dots of Benzothiazine Derivatives for Detection of Quercetin in Ginkgo Biloba Tea[J]. Chem. J. Chinese Universities, 2020, 41(8): 1768.

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