Bai Hao-Jie, Li Hong-Wei, Li Yi, Huang Zhijiu, Liu Sha, Duan Xin-He, Wu Yuqing
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, No. 2699 Qianjin Street, Changchun, 130012, PR China; Institute of Theoretical Chemistry, College of Chemistry, Jilin University, No. 2 Liutiao Road, Changchun, 130023, PR China.
China Light Industry Enterprises Investment and Development Association, 22B. Fuwai Avenue, Xicheng District, Beijing, 100833, PR China.
Talanta. 2024 Nov 1;279:126660. doi: 10.1016/j.talanta.2024.126660. Epub 2024 Aug 2.
Detecting the furfural concentration in Baijiu can be used to assess the quality of Baijiu, allowing for the optimization of processing techniques and the enhancement of overall quality. In this paper, a fluorescence-enhanced method based on carbon dots (o-CDs) is developed for the furfural determination in Chinese Baijiu. In an environment full-filled with ·SO and ·OH, furfural undergone a direct surface reaction with the ortho-diamino groups at o-CDs. The created furan-based imidazole increased the surface electron density, leading an emission enhancement and color changes from orange to green. Thereby, a linear fluorescence response of o-CDs-TA to furfural is established in water with a detection limit of 30.5 nM. Finally, after ethanol correction it is used to determine furfural in Chinese Baijiu with high precision and reproducibility, providing a new strategy with low-cost and high sensitivity. In particular, the idea of covalently connecting target molecule to the CDs surface via the assistance of free radical opens a new avenue to merge the nanoscale and molecular realms through implementing chemical role into carbon nanostructures.
检测白酒中的糠醛浓度可用于评估白酒质量，有助于优化加工工艺并提高整体品质。本文开发了一种基于碳点（o-CDs）的荧光增强法用于测定中国白酒中的糠醛。在充满·SO和·OH的环境中，糠醛与o-CDs上的邻二氨基基团发生直接表面反应。生成的基于呋喃的咪唑增加了表面电子密度，导致发射增强且颜色从橙色变为绿色。由此，在水中建立了o-CDs-TA对糠醛的线性荧光响应，检测限为30.5 nM。最后，经过乙醇校正后，该方法用于高精度、可重复地测定中国白酒中的糠醛，提供了一种低成本、高灵敏度的新策略。特别地，通过自由基辅助将目标分子共价连接到碳点表面的想法为通过将化学作用引入碳纳米结构来融合纳米尺度和分子领域开辟了一条新途径。
