Li Honghong, Han Yanbing, Shao Zhichao, Li Na, Huang Chao, Hou Hongwei
The College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China.
Department of pharmacy, Women & Infants Hospital of Zhengzhou, Henan 450012, P. R. China.
Dalton Trans. 2017 Sep 28;46(36):12201-12208. doi: 10.1039/c7dt02590d. Epub 2017 Sep 5.
Two novel Eu metal-organic frameworks (MOFs), namely {[Eu(pdba)(HO)]·2HO} (1) and {[Eu(pdba)(HO)]·5HO} (2), were prepared with 4'-(1H-pyrazol-3-yl)-[1,1'-biphenyl]-3,5-dicarboxylic acid (Hpdba) under hydrothermal conditions. MOF 1 exhibits a 3D supramolecular structure assembled from the ππ interactions between the benzene rings of the ligands, whereas 2 comprises a 3D structure through coordination connection between nitrogen atom and Eu. It is worth noting that the two MOFs showed good luminescence performance and high-sensitivity fluorescence quenching behavior toward Fe (Cr) and nitrobenzene. Furthermore, the experimental results for stability in water and cycle test show that these two MOFs can be used as potential fluorescent probes.
在水热条件下，用4'-(1H-吡唑-3-基)-[1,1'-联苯]-3,5-二羧酸（Hpdba）制备了两种新型铕金属有机框架（MOF），即{[Eu(pdba)(H₂O)]·2H₂O}（1）和{[Eu(pdba)(H₂O)]·5H₂O}（2）。MOF 1呈现出由配体苯环之间的π-π相互作用组装而成的三维超分子结构，而2则通过氮原子与铕之间的配位连接构成三维结构。值得注意的是，这两种MOF对Fe³⁺（Cr₂O₇²⁻）和硝基苯表现出良好的发光性能和高灵敏度荧光猝灭行为。此外，在水中的稳定性实验结果和循环测试表明，这两种MOF可作为潜在的荧光探针。
