Carbon dots-based fluorescent probes for sensitive and selective detection of iodide
Carbon dots-based fluorescent probes for sensitive and selective detection of iodide
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DOI：
10.1007/s00604-013-0954-2
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发表时间：
2013-04-01
影响因子：
5.7
通讯作者：
Wu, Shuizhu
中科院分区：
文献类型：
--
作者：
Du, Fangkai;Zeng, Fang;Wu, Shuizhu
我们报告了一个简单的方法，用于测定水溶液中的碘化物，利用荧光增强，观察到如果碳量子点和汞离子之间形成的复合物暴露于碘化物。用Hg（II）离子处理荧光碳点（C-点），这导致C-点的发射淬灭。在添加碘化物时，由于Hg（II）和碘化物之间的强相互作用，Hg（II）离子从络合物中除去。这导致荧光恢复，并使碘化物能够在0.5至20 μ M的浓度范围内测定，检测限接近430 nM。该测试对碘离子具有高度选择性（超过常见的其他阴离子），并用于测定尿液中的碘离子。
We report on a simple method for the determination of iodide in aqueous solution by exploiting the fluorescence enhancement that is observed if the complex formed between carbon dots and mercury ion is exposed to iodide. Fluorescent carbon dots (C-dots) were treated with Hg(II) ion which causes quenching of the emission of the C-dots. On addition of iodide, the Hg(II) ions are removed from the complex due to the strong interaction between Hg(II) and iodide. This causes the fluorescence to be restored and enables iodide to be determined in the 0.5 to 20 mu M concentration range and with a detection limit of similar to 430 nM. The test is highly selective for iodide (over common other anions) and was used for the determination of iodide in urine.