Key Lab of Eco-Environments Related Polymer Materials of MOE, Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, PR China.
Key Lab of Eco-Environments Related Polymer Materials of MOE, Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, PR China.
Anal Chim Acta. 2021 Jan 2;1141:13-20. doi: 10.1016/j.aca.2020.10.028. Epub 2020 Oct 19.
A novel dual-emission ratiometric fluorescent sensor (CDs@Eu-MOFs) has been synthesized successfully by encapsulating water-soluble fluorescent CDs into the chambers of Eu-MOFs via a simple one-pot hydrothermal method, which can be used for the detection of Hg in environmental water samples. The synthesized CDs@Eu-MOFs inherited simultaneously the excellent luminescence performance of Eu and CDs and exhibited good structural and fluorescence stability in aqueous solution. The presence of Hg changed the fluorescence intensity of CDs, while the fluorescence intensity of Eu-MOFs hardly changed, which could be used as the recognition part and the reference part respectively to construct the ratiometric fluorescence sensor. The obtained Hg fluorescent probe showed a wide linear range (0-300 μM) and a low detection limit (0.12 nM). The developed method can be used as a multi-functional fluorescent sensor with high sensitivity and good selectivity for the determination of Hg in actual water samples.
一种新型的双发射比率荧光传感器（CDs@Eu-MOFs）已通过简单的一锅水热法成功合成，该传感器通过将水溶性荧光 CDs 封装到 Eu-MOFs 的腔室中而合成，可用于检测环境水样中的 Hg。所合成的 CDs@Eu-MOFs 同时继承了 Eu 和 CDs 的优异发光性能，并在水溶液中表现出良好的结构和荧光稳定性。Hg 的存在改变了 CDs 的荧光强度，而 Eu-MOFs 的荧光强度几乎不变，可分别用作识别部分和参考部分，以构建比率荧光传感器。所得的 Hg 荧光探针具有较宽的线性范围（0-300 μM）和较低的检测限（0.12 nM）。开发的方法可用作多功能荧光传感器，具有高灵敏度和良好选择性，可用于实际水样中 Hg 的测定。
