College of Chemistry, Jilin University, Changchun, 130012, People's Republic of China.
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, People's Republic of China.
Mikrochim Acta. 2018 Apr 13;185(5):252. doi: 10.1007/s00604-018-2781-y.
A fluorescent probe is presented for sensitive determination of Hg(II). It is based on aggregation induced enhancement effect (AIEE) of carbon dots co-doped with nitrogen and sulfur (N,S-CDs). The N,S-CDs were prepared by a one-pot microwave-assisted method using glycerol as the reaction solvent, and cystine as the source for C, N and S. The resulting CDs are well soluble in water and have a turn-on fluorescence response to Hg(II). The incubation time and ratio of raw materials were optimized. Fluorescence, best measured at excitation/emission wavelengths of 325/385 nm, increases linearly in the 1-75 μM Hg(II) concentration range, and the detection limit is 0.5 μM. The method performed successfully when detecting Hg(II) in spiked tap and lake waters, with recoveries between 92 and 106%. Graphical abstract Schematic presentation of the aggregation induced enhancement of the fluorescence of carbon dots co-doped with nitrogen and sulfur after addition of Hg(II).
一种荧光探针被提出用于灵敏测定 Hg(II)。它基于氮硫共掺杂碳点（N,S-CDs）的聚集诱导增强效应（AIEE）。N,S-CDs 通过一锅微波辅助法以甘油为反应溶剂，半胱氨酸为 C、N 和 S 的来源制备。所得碳点在水中具有良好的溶解性，并对 Hg(II）表现出开启的荧光响应。优化了孵育时间和原料比。荧光在激发/发射波长为 325/385nm 时最佳测量，在 1-75μM Hg(II)浓度范围内呈线性增加，检测限为 0.5μM。该方法在测定加标自来水和湖水的 Hg(II)时表现良好，回收率在 92%至 106%之间。
