Liao Ya-Qing, Zhang Huan, Wang Miao-Miao, Hu Jun-Jie, Peng Yan, Wen He-Rui
School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Crystalline Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, P. R. China.
Inorg Chem. 2025 Jun 23;64(24):12198-12210. doi: 10.1021/acs.inorgchem.5c01528. Epub 2025 Jun 9.
Redox-active metal-organic frameworks have received increasing attention for potential applications in conductivity, sensing, catalysis, and magnetism. In this work, a novel redox-active europium-based metal-organic framework, {[(CH)NH][Eu(BTA-2OH)(HO)]·2HO} (, HBTA-2OH = 2,3,5,6-tetrakis(-carboxyphenyl)hydroquinone), is prepared and structurally characterized. The is characterized by a well-defined structure featuring a two-dimensional channel along the -axis. can be converted into through the oxidation of hydroquinone to benzoquinone, which can maintain structural stability and enhance fluorescence emission. Compared with , displays a more sensitive visual identification of 2,6-pyridine dicarboxylic acid (DPA) or oxytetracycline (OTC) as a ratiometric fluorescent sensor with lower detection limits of 0.013 and 0.071 μM, respectively. Fluorescent composite films and smartphone-based readout systems based on s have been constructed to achieve rapid on-site quantification and testing. Moreover, displays a more outstanding proton conductivity value of 1.16 × 10 S cm than (2.01 × 10 S cm) at 50 °C and 100% RH, indicating its high performance and potential application in the field of proton conduction. Therefore, the is a potential bifunctional material for fluorescence sensing and proton conduction.
氧化还原活性金属有机框架因其在导电性、传感、催化和磁性方面的潜在应用而受到越来越多的关注。在这项工作中，制备并对一种新型的氧化还原活性铕基金属有机框架{[(CH)NH][Eu(BTA - 2OH)(HO)]·2HO}（HBTA - 2OH = 2,3,5,6 - 四（- 羧基苯基）对苯二酚）进行了结构表征。该框架具有沿轴的二维通道的明确结构。通过对苯二酚氧化为苯醌，可将其转化为 ，这能保持结构稳定性并增强荧光发射。与 相比，作为比率荧光传感器， 对2,6 - 吡啶二甲酸（DPA）或土霉素（OTC）表现出更灵敏的视觉识别，检测限分别低至0.013和0.071 μM。基于 的荧光复合膜和基于智能手机的读出系统已被构建，以实现快速的现场定量和测试。此外，在50°C和100%相对湿度下， 显示出比 （2.01×10 S cm）更出色的质子传导率值1.16×10 S cm，表明其在质子传导领域的高性能和潜在应用。因此， 是一种用于荧光传感和质子传导的潜在双功能材料。
