Zhang Xu, Li Zheng, Zhang Yana, Jiao Chengqi, Zheng Hanwen, Zhu Yanyu, Sun Zhengang
School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, P. R. China.
State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P. R. China.
Inorg Chem. 2024 Sep 2;63(35):16418-16428. doi: 10.1021/acs.inorgchem.4c02461. Epub 2024 Aug 20.
Lanthanide metal-organic frameworks (Ln-MOFs) have excellent optical properties and structural diversity, providing a unique platform for the development of fluorescent sensing and optical materials. In the work described herein, a series of isostructural 3D Ln-MOFs [Ln(L)(HO)]·2HO (Ln = Eu (), Gd (), Tb (), HL = 3,3',3″-[1,3,5-benzenetriyltris(carbonylimino)]tris-benzoate) are fabricated under solvothermal conditions. The good thermal, water, and acid-base stabilities of are prerequisites for fluorescent sensing applications. can be used as a ratiometric broad-spectrum fluorescent sensor for toluenediamines (TDAs) in real urine with the advantages of visualization, ultrasensitivity, and selectivity. Interestingly, a smartphone-assisted intelligent sensing platform manifests promising results for the detection of TDAs, providing a chance for further development of portable diagnostic tools. In addition, by tuning the ratios of Eu/Tb and Eu/Gd/Tb, nine bimetallic-doped EuTb ( = 0.10-0.90, -) and one trimetallic-doped GdTbEu () were obtained. - exhibit a gradient of luminescent colors from yellow-green to pink with different ratios of Eu and Tb ions. Meanwhile, the trimetallic-doped GdTbEu () shows near-white-light emission with a quantum yield of 8.76%. Interestingly, the inks made with - are invisible under ambient light but show visual color-tunable luminescence under a 254 nm UV lamp, which may facilitate their anti-counterfeiting applications.
镧系金属有机框架材料（Ln-MOFs）具有优异的光学性能和结构多样性，为荧光传感和光学材料的发展提供了一个独特的平台。在本文所述的工作中，在溶剂热条件下制备了一系列同构的三维Ln-MOFs [Ln(L)(HO)]·2HO（Ln = Eu（）、Gd（）、Tb（），HL = 3,3',3″-[1,3,5-苯三基三（羰基亚氨基）]三苯甲酸酯）。其良好的热稳定性、水稳定性和酸碱稳定性是荧光传感应用的先决条件。它可以用作实际尿液中甲苯二胺（TDAs）的比率型广谱荧光传感器，具有可视化、超灵敏性和选择性等优点。有趣的是，一个智能手机辅助的智能传感平台在检测TDAs方面显示出有前景的结果，为便携式诊断工具的进一步发展提供了机会。此外，通过调节Eu/Tb和Eu/Gd/Tb的比例，获得了九种双金属掺杂的EuTb（ = 0.10 - 0.90， -）和一种三金属掺杂的GdTbEu（）。 - 随着Eu和Tb离子比例的不同呈现出从黄绿色到粉红色的发光颜色梯度。同时，三金属掺杂的GdTbEu（）显示出近白光发射，量子产率为8.76%。有趣的是，用 - 制成的墨水在环境光下不可见，但在254 nm紫外灯下显示出视觉上颜色可调的发光，这可能有助于它们的防伪应用。
