基于三嗪三羧酸配体的Tb-TATAB晶体有机骨架材料：光物理性质和荧光传感应用

IF 2.6 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

CrystEngComm Pub Date : 2025-02-19 DOI:10.1039/D4CE01294A

Yuan Liu, Jin Long Li, Na Zhang, Yue Zhao, Qing Lin Guan, Yong Heng Xing and Feng Ying Bai

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引用次数: 0

摘要

通过稀土金属Tb（III）与H3TATAB的反应，构建了基于三嗪三羧酸配体（2,4,6-三（4-羧基苯胺）-1,3,5-三嗪（H3TATAB））的Tb- mof配合物。该配合物具有由双核二级构建单元[Tb2(CO2)6]与H3TATAB配体构建的三维非互穿网络结构。该配合物具有良好的溶剂稳定性、酸碱稳定性和热稳定性。根据配合物的荧光特性，发现该配合物对7种不同取代基的硝基芳香族化合物（NACs）以及重金属阴离子和阳离子（Cr2O72−和Fe3+）具有敏感的荧光响应，可循环利用。荧光猝灭行为初步归因于CA和PET机制的协同作用。

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Tb–TATAB crystalline organic framework material based on triazine tricarboxylic acid ligand: photophysical properties and fluorescence sensing applications†

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Tb–TATAB crystalline organic framework material based on triazine tricarboxylic acid ligand: photophysical properties and fluorescence sensing applications†

A Tb-MOF complex based on triazine tricarboxylic acid ligands (2,4,6-tri(4-carboxylaniline)-1,3,5-triazine (H₃TATAB)) was constructed through the reaction of the rare earth metal Tb(III) and H₃TATAB. The complex featured a three-dimensional non-interpenetrating network structure constructed by the binuclear secondary building unit [Tb₂(CO₂)₆] and the H₃TATAB ligand. The complex exhibited excellent solvent stability, acid–base stability and thermal stability. Based on the fluorescence characteristics of the complex, it was found that the complex exhibited a sensitive fluorescence response and was recyclable for 7 kinds of nitroaromatic compounds (NACs) with different substituted groups, as well as heavy metal anions and cations (Cr₂O₇²⁻ and Fe³⁺). The fluorescence quenching behavior was preliminarily attributed to the synergistic effect of the CA and PET mechanisms.