Yang Yang, Chen Zhonghang, Fu Chuya, Kumar Sandeep, Shi Wei, Sun Feiyun, Yang Xuemei, Ren Peng
School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China.
Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE), Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, China.
Inorg Chem. 2023 Dec 4;62(48):19565-19572. doi: 10.1021/acs.inorgchem.3c02868. Epub 2023 Nov 17.
Phenolic organic compounds are widely used industrial chemicals that exist extensively in the environment and have a significant impact on human health. 4-Nitrophenol (4-NP) is a typical phenolic organic compound found in aqueous environments. Efficient detection of 4-NP in wastewater is highly challenging due to the complexity of testing environmental samples. Herein, a luminescent lanthanide metal-organic framework (MOF) sensor based on the Eu ion {[Eu(HL)(L)(HO)]·2HO} (; HL = 5-(4-1,2,4-triazol-4-yl)benzene-1,3-dicarboxylic acid) was successfully synthesized for efficient 4-NP detection in wastewater. Fluorescence sensing experiments revealed that 4-NP could greatly quench the fluorescence. Subsequently, was applied to 4-NP detection in distilled water, tap water, river water, and treated industrial wastewater, exhibiting high sensitivity, a fast response within 30 s, high selectivity, excellent reusability, and a low detection limit. Finally, the fluorescence quenching mechanism was explored and attributed to competitive absorption of irradiated light between 4-NP and the ligand.
酚类有机化合物是广泛使用的工业化学品，在环境中广泛存在，对人类健康有重大影响。4-硝基苯酚（4-NP）是在水环境中发现的典型酚类有机化合物。由于测试环境样品的复杂性，高效检测废水中的4-NP极具挑战性。在此，成功合成了一种基于铕离子{[Eu(HL)(L)(HO)]·2HO}（；HL = 5-(4-1,2,4-三唑-4-基)苯-1,3-二羧酸）的发光镧系金属有机框架（MOF）传感器，用于高效检测废水中的4-NP。荧光传感实验表明，4-NP能极大地猝灭荧光。随后，该传感器被应用于蒸馏水、自来水、河水和处理后的工业废水中的4-NP检测，表现出高灵敏度、30秒内快速响应、高选择性、优异的可重复使用性和低检测限。最后，探讨了荧光猝灭机制，其归因于4-NP与配体之间对照射光的竞争性吸收。
