College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China.
College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China; Hebei Provincial Key Laboratory of Medicinal Molecular Chemistry - State Key Laboratory Breeding Base, Shijiazhuang 050018, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2024 Jan 15;305:123504. doi: 10.1016/j.saa.2023.123504. Epub 2023 Oct 16.
In this study, N-doped fluorescent carbon dots with aggregation enhanced emission (N-CDs) were synthesized by a simple and rapid microwave-assisted method using o-phenylenediamine (OPD) and urea as raw materials and water as solvent. The fluorescence quantum yield of N-CDs was 20.64 %. N-CDs can be applied as invisible inks for message encryption. Furthermore, the fluorescence intensity of N-CDs can be quenched by Fe and enhanced by tetracycline (TC). Therefore, two fluorescent probes were simultaneously designed in this study. Namely, "turn-off" fluorescence probe for Fe and "turn-on" fluorescence probe for TC. The linear detection range of Fe is from 1 to 70 μM, and detection limit is 0.1011 μM; the linear detection range of TC is from 0.1 to 10 μM, and the detection limit can be as low as 0.0555 μM. In this paper, the mutual interference between Fe and TC was investigated for the first time. The detection of Fe and TC was made more accurate by optimizing pH conditions and adding masking agent.
在这项研究中，通过一种简单快速的微波辅助方法，以邻苯二胺（OPD）和尿素为原料，水为溶剂，合成了具有聚集增强发射（AEE）效应的氮掺杂荧光碳点（N-CDs）。N-CDs 的荧光量子产率为 20.64%。N-CDs 可用作隐形墨水进行信息加密。此外，N-CDs 的荧光强度可以被 Fe 猝灭，同时被四环素（TC）增强。因此，本研究同时设计了两种荧光探针，即用于检测 Fe 的“关闭”荧光探针和用于检测 TC 的“开启”荧光探针。Fe 的线性检测范围为 1 至 70 μM，检测限为 0.1011 μM；TC 的线性检测范围为 0.1 至 10 μM，检测限可低至 0.0555 μM。本文首次研究了 Fe 和 TC 之间的相互干扰。通过优化 pH 条件和添加掩蔽剂，使 Fe 和 TC 的检测更加准确。
