Colorimetric and Fluorescence Determination of Glucose Based on Cell-derived Fluorescent Carbon Dots

LIU Yingqi, WANG Yemei, JIANG Kai, ZHENG Fenfen, ZHU Junjie

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Chem J Chin Univ ›› 2025, Vol. 46 ›› Issue (6) : 122-129. DOI: 10.7503/cjcu20240386
Article

Colorimetric and Fluorescence Determination of Glucose Based on Cell-derived Fluorescent Carbon Dots

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Abstract

Cell derived fluorescent carbon points(CDs) were synthesized via one step hydrothermal method. It is found that the CDs have excellent peroxide-like catalytic activity, which can catalyze the hydrogen peroxide to produce hydroxyl radical. Based on this, the hydrogen peroxide produced by glucose oxidation and CDs could consecutively oxidize p-phenylenediamine(PPD) to produce PPDox[2,5-Diamino-NN′-di-(4-aminophenyl)-2,5-cyclohexadiene-1,4-diimine]. By virtue of the inner filer effect of PPDox on CDs, a dual-mode colorimetric and fluorescent detection of glucose was establised. The limit of detection of the present assay are 41 µmol/L and 13 µmol/L for the colorimetric method and the fluorescence method, respectively. In this work, CDs can not only be used as a peroxide-like enzyme to catalyze hydrogen peroxide to produce hydroxyl radical for PPD oxidation, but also be used as a fluorescent indicator to indicate the change of glucose concentration through the internal filtration effect.

Key words

Cell derived fluorescent carbon dots / Peroxide-like / Glucose probe

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LIU Yingqi , WANG Yemei , JIANG Kai , et al . Colorimetric and Fluorescence Determination of Glucose Based on Cell-derived Fluorescent Carbon Dots. Chemical Journal of Chinese Universities. 2025, 46(6): 122-129 https://doi.org/10.7503/cjcu20240386

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Funding

the National Natural Science Foundation of China(21804059)
the Postgraduate Research & Practice Innovation Program of Jiangsu Province, China(KYCX23_3898)

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