Jiang Xin, Li Wenwei, Liu Min, Yang Jie, Liu Mengjiao, Gao Daojiang, Li Hongda, Ning Zhanglei
College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, China.
Key Laboratory of Treatment for Special Wastewater of Sichuan Province Higher Education System, Chengdu 610066, China.
Molecules. 2023 Aug 3;28(15):5847. doi: 10.3390/molecules28155847.
In this study, a red-green dual-emitting fluorescent composite (RhB@MOFs) was constructed by introducing the red-emitting organic fluorescent dye rhodamine B (RhB) into metal-organic frameworks (Tb-MOFs). The sample can be used as a ratiometric fluorescent probe, which not only avoids errors caused by instrument and environmental instability but also has multiple applications in detection. The results indicated that the RhB@MOFs exhibited a turned-off response toward Fe and a turned-on response for the continuous detection of ascorbic acid (AA). This ratiometric fluorescent probe possessed high sensitivity and excellent selectivity in the continuous determination of Fe and AA. It is worth mentioning that remarkable fluorescence change could be clearly observed by the naked eye under a UV lamp, which is more convenient in applications. In addition, the mechanisms of Fe- and AA-induced fluorescence quench and recovery are discussed in detail. This ratiometric probe displayed outstanding recognition of heavy metal ions and biomolecules, providing potential applications for water quality monitoring and biomolecule determination.
在本研究中，通过将红色发射有机荧光染料罗丹明B（RhB）引入金属有机框架（Tb-MOFs）构建了一种红绿双发射荧光复合材料（RhB@MOFs）。该样品可作为比率荧光探针，不仅避免了仪器和环境不稳定引起的误差，而且在检测中具有多种应用。结果表明，RhB@MOFs对Fe呈现猝灭响应，对连续检测抗坏血酸（AA）呈现开启响应。这种比率荧光探针对Fe和AA的连续测定具有高灵敏度和优异的选择性。值得一提的是，在紫外灯下肉眼可清晰观察到显著的荧光变化，这在应用中更加方便。此外，还详细讨论了Fe和AA诱导荧光猝灭和恢复的机制。这种比率探针在重金属离子和生物分子的识别方面表现出色，为水质监测和生物分子测定提供了潜在应用。
