College of Life and Health Sciences, Northeastern University, Shenyang 110000, China.
College of Life and Health Sciences, Northeastern University, Shenyang 110000, China.
Biosens Bioelectron. 2017 Oct 15;96:44-48. doi: 10.1016/j.bios.2017.01.005. Epub 2017 Jan 4.
Determination of iodide ions has attracted considerable interest due to the importance and urgency. In the current work, we have developed a novel fluorescent and colorimetric platform for simple and selective detection of iodide ions based on the DNA-templated gold/silver nanoclusters (DNA-Au/Ag NCs). The detection system is based on the unique interaction between iodide ions and DNA-Au/Ag NCs, which shows an obvious fluorescence quenching with the addition of iodide ions and a good linear range from 0 to 10μmol/L for iodide ions. In the mean time, the detection system also exhibits an obvious color change from colorless transparent to purple red with the addition of iodide ions. Furthermore, the proposed system has been successfully applied for determination of iodide ions in real water samples.
碘离子的测定由于其重要性和紧迫性而引起了相当大的关注。在当前的工作中，我们开发了一种基于 DNA 模板金/银纳米团簇（DNA-Au/Ag NCs）的新型荧光和比色平台，用于简单和选择性检测碘离子。该检测系统基于碘离子与 DNA-Au/Ag NCs 之间的独特相互作用，随着碘离子的加入，表现出明显的荧光猝灭，并且对碘离子的线性范围从 0 到 10μmol/L。同时，随着碘离子的加入，检测系统也表现出从无色透明到紫红色的明显颜色变化。此外，该提出的系统已成功应用于实际水样中碘离子的测定。
