Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry , Zhejiang Normal University , Jinhua 321004 , China.
State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, School of Materials Science and Engineering , Zhejiang University , Hangzhou 310027 , China.
Inorg Chem. 2018 Oct 15;57(20):12596-12602. doi: 10.1021/acs.inorgchem.8b01746. Epub 2018 Sep 26.
A fluorine-modified tetracarboxylic acid ligand, namely, 2'-fluoro-[1,1':4',1''-terphenyl]-3,3'',5,5''-tetracarboxylic acid (HFTPTC), with suitable triplet energy excited state, was designed and applied to construct the luminescent lanthanide metal-organic frameworks (LnMOFs) for cryogenic temperature sensing. With the lanthanides codoping strategy, we developed a new Tb/Eu mixed LnMOF system TbEu FTPTC ( x = 0.05, 0.1, 0.2), which feature excellent linear responses to temperature with high relative sensitivity in the cryogenic range of 25-125 K. It was found that the relative sensitivity of such mixed LnMOF could readily be tuned by adjusting the incorporation amount of Eu ions in the host framework. In addition, the energy transfer efficiency between the Tb and Eu ions in the framework with different Tb/Eu ratios are also investigated and discussed.
一种氟修饰的四羧酸配体，即 2'-氟-[1,1':4',1''-三联苯]-3,3'',5,5''-四羧酸（HFTPTC），具有合适的三重态能量激发态，被设计并应用于构建用于低温传感的发光镧系金属有机骨架（LnMOFs）。通过镧系元素共掺杂策略，我们开发了一种新的 Tb/Eu 混合 LnMOF 体系 TbEu FTPTC（x=0.05、0.1、0.2），其在 25-125 K 的低温范围内具有优异的线性温度响应和高相对灵敏度。研究发现，通过调整主体框架中 Eu 离子的掺入量，很容易调节这种混合 LnMOF 的相对灵敏度。此外，还研究和讨论了不同 Tb/Eu 比的框架中 Tb 和 Eu 离子之间的能量转移效率。
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