College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, No. 26 Hexing Road, Harbin 150040, China.
College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, No. 26 Hexing Road, Harbin 150040, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2023 Nov 5;300:122916. doi: 10.1016/j.saa.2023.122916. Epub 2023 May 29.
Two anthracene-based zirconium metal-organic frameworks (UiO-68-AN-fcu and UiO-68-AN-hcp) with blue emission were synthesized by the solvothermal reaction of ZrCl with anthracene-based ligand 4,4'-(9,10-anthracenediyl)dibenzoic acid. The two MOFs inherited the luminescence properties of anthracene-based ligand and exhibited different topologies due to the change of connection mode of Zr-O clusters. The two stable anthracene-based zirconium MOFs served as luminescent sensors for selectively detecting 2-nitrophenol, Fe and CrO. UiO-68-AN-hcp with flower morphology exhibited stronger quenching effect for 2-nitrophenol, Fe and CrO by comparing to UiO-68-AN-fcu. Adsorption tests, fluorescence lifetime and spectroscopy studies demonstrated that the fluorescence responses of MOFs for analytes can be primarily attributed to the dynamic quenching mechanism involving energy and electron transfer. These results revealed that the combination of luminescent anthracene-based ligand and Zr-O clusters is a feasible strategy to construst MOFs-based fluorescent sensors.
两种基于蒽的锆基金属有机骨架（UiO-68-AN-fcu 和 UiO-68-AN-hcp）具有蓝色发射，通过 ZrCl 与基于蒽的配体 4,4'-(9,10-蒽二基)二苯甲酸的溶剂热反应合成。这两种 MOF 继承了基于蒽的配体的发光性质，并由于 Zr-O 簇连接模式的变化呈现出不同的拓扑结构。两种稳定的基于蒽的锆基金属有机骨架作为荧光传感器，可选择性地检测 2-硝基苯酚、Fe 和 CrO。与 UiO-68-AN-fcu 相比，具有花状形态的 UiO-68-AN-hcp 对 2-硝基苯酚、Fe 和 CrO 表现出更强的猝灭效应。吸附测试、荧光寿命和光谱研究表明，MOF 对分析物的荧光响应主要归因于涉及能量和电子转移的动态猝灭机制。这些结果表明，将发光的基于蒽的配体与 Zr-O 簇相结合是构建基于 MOF 的荧光传感器的一种可行策略。
