State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, P. R. China.
Analyst. 2012 May 21;137(10):2406-14. doi: 10.1039/c2an35051c. Epub 2012 Apr 10.
The development of a user-friendly sensing platform for the detection of Cu(2+) in water is necessary as there are wide concerns due to the substantial impact of Cu(2+) on human health, environmental monitoring, and so on. Motivated by this, we report a fluorescent silver nanoclusters (AgNCs)-based sensor for the detection of Cu(2+). These water-soluble AgNCs, as a new class of fluorescent probes, were synthesized by using azobenzene modified poly(acrylic acid) (MPAA) as templates. Their fluorescence can be quenched in the presence of Cu(2+), which enables the label-free detection of Cu(2+) in real water samples. Furthermore, such AgNCs can be integrated onto cellulose filter paper and used as fluorescent indicators for Cu(2+). The fluorescence quenching can be observed by the naked eye under UV light. It should be noted that this AgNCs-based paper assay performs successfully in barrelled drinking water and river water samples. Therefore, it opens up new avenues to the development of robust clusters-based sensing platforms.
开发一种用户友好的用于检测水中 Cu(2+)的传感平台是非常必要的，因为 Cu(2+)对人类健康、环境监测等方面有重大影响，引起了广泛关注。受此启发，我们报告了一种基于荧光银纳米簇（AgNCs）的用于检测 Cu(2+)的传感器。这些水溶性 AgNCs 作为一类新型荧光探针，是通过使用偶氮苯改性聚丙烯酸（MPAA）作为模板合成的。在存在 Cu(2+)的情况下，其荧光可以被猝灭，从而可以在实际水样中实现对 Cu(2+)的无标记检测。此外，这种 AgNCs 可以集成到纤维素滤纸上，并用作 Cu(2+)的荧光指示剂。在紫外光下可以通过肉眼观察到荧光猝灭。值得注意的是，这种基于 AgNCs 的纸分析在桶装饮用水和河水样本中都能成功进行。因此，它为开发稳健的基于簇的传感平台开辟了新途径。
