聚集增强发射橙色碳点,用于信息加密和检测Fe3+和四环素。

Chunyan Li, Lei Liu, Daohan Zhang
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引用次数: 1

摘要

本研究以邻苯二胺(OPD)和尿素为原料,以水为溶剂,采用简单快速的微波辅助方法合成了具有聚集增强发射的N掺杂荧光碳点(N-CDs)。N-CDs的荧光量子产率为20.64%。N-CDs可以作为不可见墨水用于消息加密。此外,Fe3+可以猝灭N-CDs的荧光强度,四环素(TC)可以增强其荧光强度。因此,本研究同时设计了两种荧光探针。即Fe3+“关”荧光探针,TC“开”荧光探针。Fe3+的线性检测范围为1~70μM,检测限为0.1011μM;TC的线性检测范围为0.1-10μM,检测限可低至0.0555μM。本文首次研究了Fe3+与TC之间的相互干扰。通过优化pH条件和添加掩蔽剂,使Fe3+和TC的检测更加准确。
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Aggregation enhanced emissive orange carbon dots for information encryption and detection of Fe3+ and tetracycline.

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 Fe3+ and enhanced by tetracycline (TC). Therefore, two fluorescent probes were simultaneously designed in this study. Namely, "turn-off" fluorescence probe for Fe3+ and "turn-on" fluorescence probe for TC. The linear detection range of Fe3+ 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 Fe3+ and TC was investigated for the first time. The detection of Fe3+ and TC was made more accurate by optimizing pH conditions and adding masking agent.

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