Journal
INORGANIC CHEMISTRY
Volume 57, Issue 20, Pages 12596-12602Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.8b01746
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Funding
- National Natural Science Foundation of China [51802284, U1609219]
- Zhejiang Provincial Natural Science Foundation of China [LZ15E020001]
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A fluorine-modified tetracarboxylic acid ligand, namely, 2'-fluoro-[1,1':4',1 ''-terpheny1]-3,3 '',5,5 ''-tetracarboxylic acid (H4FTPTC), 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 Tb3+/Eu3+ mixed LnMOF system Tb1-xEuxFTPTC (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 Eu3+ ions in the host framework. In addition, the energy transfer efficiency between the Tb3+ and Eu3+ ions in the framework with different Tb3+/Eu3+ ratios are also investigated and discussed.
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