荧光
检出限
选择性
光漂白
电化学
乙二胺
量子产额
碳纤维
化学
材料科学
紫外线
分析化学(期刊)
核化学
光化学
无机化学
色谱法
光电子学
有机化学
物理
物理化学
复合材料
催化作用
电极
复合数
量子力学
作者
Yu-Sheng Lee,Cho-Chun Hu,Tai‐Chia Chiu
标识
DOI:10.1016/j.jece.2022.107413
摘要
Carbon dots (CDs) have been used for the fluorescent turn-on detection of chlortetracycline (CTC) with high selectivity and sensitivity. In this study, CDs were fabricated via electrochemical treatment using diethylenetriaminepentaacetic acid and ethylenediamine as precursors. The synthesized CDs exhibited blue fluorescence under ultraviolet irradiation and a maximum emission of 407 nm at an excitation wavelength of 325 nm; the calculated quantum yield was 2.5%. Moreover, the CDs demonstrated excellent water solubility and photobleaching resistance as well as good stability. In the presence of CTC, a considerable enhancement in fluorescence emission was observed, based on aggregation-induced emission enhancement owing to the complexation of CTC and CDs, thus providing the foundation for quantifying CTC. Under optimal conditions, the linear range was 0.8–10 μM (R2 = 0.9944), and the corresponding limit of detection was 16.9 nM. The proposed sensing system was successfully applied for determining CTC in actual samples with good recoveries between 91.3% and 110.6%.
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