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Red emissive N-doped carbon dots encapsulated within molecularly imprinted polymers for optosensing of pyrraline in fatty foods

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Abstract

A novel and facile method was proposed for preparation of red emissive N-doped carbon dots encapsulated within molecularly imprinted polymers (RNCDs@MIPs) using a one-pot room-temperature reverse microemulsion polymerization. RNCDs used citric acid and urea as carbon and nitrogen sources by one-step solvothermal synthesis with the optimum emission of 620 nm. Unique optical properties of RNCDs coupled with high selective MIPs make the RNCDs@MIPs conjugate capable to adsorb specific targets of pyrraline (PRL), such a binding event was then transduced to quench fluorescence response signal of the RNCDs. RNCDs@MIPs for PRL showed linearity from 0.1 to 40 μg/L, with a detection limit of 65 ng/L. The RNCDs@MIPs exhibited a good reproducibility of 4.67% obtained from four times of rebinding for PRL. The optosensing probe was successfully applied to the detection of PRL in fatty foods with the spiked recovery of 85.93–106.96%.

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Funding

This work was supported by the National Natural Science Foundation of China (No. 32072335) and the Cultivation Project of Double First-Class Disciplines of Food Science and Engineering, Beijing Technology & Business University (BTBU).

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Authors and Affiliations

  1. School of Food and Health, Beijing Technology & Business University (BTBU), Beijing, 100048, China

    Chenchen Xie, Jingbo He, Chen Meng, Xiaolin Chen, Huilin Liu & Baoguo Sun

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  1. Chenchen Xie
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  4. Xiaolin Chen
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Correspondence to Huilin Liu.

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Xie, C., He, J., Meng, C. et al. Red emissive N-doped carbon dots encapsulated within molecularly imprinted polymers for optosensing of pyrraline in fatty foods. Microchim Acta 190, 88 (2023). https://doi.org/10.1007/s00604-023-05669-3

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