Microwave-assisted synthesis of nitrogen-rich carbon dots as effective fluorescent probes for sensitive detection of Ag+
Microwave-assisted synthesis of nitrogen-rich carbon dots as effective fluorescent probes for sensitive detection of Ag+
复制标题
微波辅助合成富氮碳点作为有效荧光探针用于灵敏检测Ag
DOI：
10.1039/c9qm00624a
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发表时间：
2019-12-01
影响因子：
7
通讯作者：
Tang, Xinjing
中科院分区：
文献类型：
--
作者：
Feng, Jie;Zhao, Xiaoran;Tang, Xinjing
以2-叠氮基咪唑为原料，在微波辐射下与不同的羟基化合物反应，合成了荧光富氮碳点。随着交联剂中羟基含量的增加，相应N点的发光性能增强。其中，以2-叠氮咪唑和甘油为起始原料合成的N-量子点单分散性好、稳定性好、水溶性好、荧光发射强，荧光量子产率高达27.9%。这些N-dots进一步作为一个有效的化学传感器Ag+分析通过静态猝灭效应和良好的线性范围内的Ag+检测得到从20 nM到6 μ M的检测限为6.3 nM，显示高选择性对Ag+检测在真实的样品。
A simple strategy for the synthesis of fluorescent nitrogen-rich carbon dots (N-dots) is developed through microwave-assisted reaction of 2-azidoimidazole with different hydroxyl compounds. With the increase of hydroxyl groups of the crosslinkers, the emission property of the corresponding N-dots was enhanced. Among them, N-dots with 2-azidoimidazole and glycerol as the starting materials showed high monodispersity, good stability, excellent water solubility and strong fluorescence emission with fluorescence quantum yield up to 27.9%. These N-dots were further employed as an effective chemosensor for Ag+ analysis via the static quenching effect and a good linear range of Ag+ detection was obtained from 20 nM to 6 mu M with a limit of detection of 6.3 nM, displaying high selectivity toward Ag+ detection in real samples.