Wang Xue, Sun Huiying, Li Xiao, Sun Jing, Su Zhong-Min
School of Chemical and Environmental Engineering, Jilin Provincial Science and Technology Innovation Centre of Optical Materials and Chemistry, Jilin Provincial International Joint Research Center of Photo-Functional Materials and Chemistry, Changchun University of Science and Technology, Changchun 130022, People's Republic of China.
Inorg Chem. 2025 May 19;64(19):9912-9920. doi: 10.1021/acs.inorgchem.5c01674. Epub 2025 May 8.
This study successfully developed a new dual-mode sensor material based on the nickel metal-organic framework (Ni-MOF) [Ni(tatrz)(5-MIA)·HO] (CUST-986) (tatrz = 1-(9-(1-1,2,4-triazol-1-yl)anthracen-10-yl)-1-1,2,4-triazole, 5-MIA = 5-methylisophthalic acid, CUST = Changchun University of Science and Technology) for a highly efficient detection of 2,4,6-trinitrophenol (TNP). In fluorescence sensing mode, CUST-986 demonstrates exceptional selective recognition capability for TNP, with a high quenching constant () of 1.676 × 10 M and an ultralow detection limit (LOD) of 69.3 nM. In electrochemical detection mode, the modified electrode achieves a TNP detection limit of 0.48 μM. Real environmental sample tests show spike recovery rates of 80.3-93.6%, indicating good potential for practical applications with long-term stability. Through characterization techniques including powder X-ray diffraction, UV-vis, DFT calculations, and fluorescence lifetime measurements, the mechanism of electron transfer and the inner filter effect was elucidated. This bifunctional MOF sensor provides a new detection solution for environmental monitoring and public safety applications.
本研究成功开发了一种基于镍金属有机框架（Ni-MOF）[Ni(tatrz)(5-MIA)·H₂O]（CUST-986）（tatrz = 1-(9-(1-1,2,4-三唑-1-基)蒽-10-基)-1-1,2,4-三唑，5-MIA = 5-甲基间苯二甲酸，CUST = 长春理工大学）的新型双模式传感器材料，用于高效检测2,4,6-三硝基苯酚（TNP）。在荧光传感模式下，CUST-986对TNP表现出优异的选择性识别能力，淬灭常数（）高达1.676×10⁵ M⁻¹，检测限低至69.3 nM。在电化学检测模式下，修饰电极对TNP的检测限为0.48 μM。实际环境样品测试表明加标回收率为80.3-93.6%，表明其在实际应用中具有良好的长期稳定性潜力。通过粉末X射线衍射、紫外可见光谱、密度泛函理论计算和荧光寿命测量等表征技术，阐明了电子转移和内滤效应的机制。这种双功能MOF传感器为环境监测和公共安全应用提供了一种新的检测解决方案。
