Fluorescent probe based on GO/g-C3N4-PEG@Cu NPs/MIP for the detection of dopamine in banana

文献类型： 外文期刊

第一作者： Wang, Yaru

作者： Wang, Yaru;Pang, Chaohai;Ma, Xionghui;Wang, Mingyue;Wu, Xiaopeng;Li, Shuhuai;Wang, Yaru;Wang, Mingyue;Liu, Sixin

作者机构：

关键词： dopamine; fluorescent probe; graphene oxide; graphite phase carbon nitride; molecular imprinted polymer

期刊名称：LUMINESCENCE （ 影响因子：3.2； 五年影响因子：2.7 ）

ISSN： 1522-7235

年卷期： 2024 年 39 卷 8 期

页码：

收录情况： SCI

摘要： Graphene oxide (GO) and copper nanoparticles (Cu NPs) were incorporated to modulate and enhance the fluorescence properties of pegylated graphite phase carbon nitride (g-C3N4-PEG). Combined with the specific recognition capability of a molecular imprinted polymer (MIP), a highly sensitive and selective fluorescent molecular imprinted probe for dopamine detection was developed. The fluorescent g-C3N4-PEG was synthesized from melamine and modified with GO and Cu NPs to obtain GO/g-C3N4-PEG@Cu NPs. Subsequently, MIP was prepared on the surface of GO/g-C3N4-PEG@Cu NPs using dopamine as the template molecule. Upon elution of the template molecule, a dopamine-specific GO/g-C3N4-PEG@Cu NPs/MIP fluorescence probe was obtained. The fluorescence intensity of the probe was quenched through the adsorption of different concentrations of dopamine by the MIP, thus establishing a novel method for the detection of dopamine. The linear range of dopamine detection was from 5 x 10(-11) to 6 x 10(-8) mol L-1, with a detection limit of 2.32 x 10(-11) mol L-1. The sensor was utilised for the detection of dopamine in bananas, achieving a spiked recovery rate between 90.3% and 101.3%. These results demonstrate that the fluorescence molecular imprinted sensor developed in this study offers a highly sensitive approach for dopamine detection in bananas.

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