Ultrasensitive Fluorescent Detection of Tetracycline Based on Selective Supramolecular Interaction of Nitrogen Chlorine Co–Doped Graphene Quantum Dots,ChemistrySelect

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Ultrasensitive Fluorescent Detection of Tetracycline Based on Selective Supramolecular Interaction of Nitrogen Chlorine Co–Doped Graphene Quantum Dots
ChemistrySelect ( IF 1.9 ) Pub Date : 2020-06-24 , DOI: 10.1002/slct.202000816
Bingli Gu ₁ , Da Chen _{1,

2} , Bo Gao ₁ , Zhiduo Liu ₃ , Zihao Wang ₁ , Ting Wang ₁ , Yongsheng Yang ₁ , Qinglei Guo ₄ , Gang Wang ₁

Affiliation

Herein, a simple bottom‐up method for producing nitrogen and chlorine co‐doped graphene quantum dots (N, Cl‐GQDs) was proposed by utilizing citric acid and 3,4‐dichloroaniline via hydrothermal treatment, and a fluorescent sensor for the detection of tetracycline was demonstrated. These synthesized N, Cl‐GQDs consist mostly of 1–3 layers with a uniform size of about 4.5 nm. Strong blue fluorescence with a quantum yield of 23.2 % was observed from the obtained N, Cl‐GQDs when irradiated with a 365 nm UV light. Systematic studies indicate that N, Cl‐GQDs have several superior features, including excitation‐independent emission, high monodispersity, good stability and water solubility. Moreover, the fluorescence intensity of N, Cl‐GQDs could be significantly quenched by the addition of a small amount of tetracycline. Finally, a fluorescent probe for the detection of tetracycline with a detection limit of 68 nM was proved, which exhibits great potentials for biosensors and biological imaging.

中文翻译：

基于氮-氯共掺杂石墨烯量子点的选择性超分子相互作用的四环素超灵敏荧光检测

本文提出了一种简单的自下而上的方法，该方法通过柠檬酸和3,4-二氯苯胺经水热处理和荧光传感器检测氮和氯共掺杂的石墨烯量子点（N，Cl-GQDs）。证明了四环素。这些合成的N，Cl-GQD主要由1-3层组成，均匀大小约为4.5 nm。当用365 nm紫外线照射时，从获得的N，Cl-GQDs中观察到强蓝色荧光，量子产率为23.2％。系统研究表明，N，Cl-GQD具有几个优越的特性，包括与激发无关的发射，高单分散性，良好的稳定性和水溶性。此外，通过添加少量的四环素可以显着淬灭N，Cl-GQDs的荧光强度。最后，

更新日期：2020-06-24

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