A stable mixed lanthanide metal-organic framework for highly sensitive thermometry

Dalton Transactions : an International Journal of Inorganic Chemistry
Yue PanZhong-Min Su

Abstract

A family of lanthanide-based MOFs (Ln-MOFs) with high thermal and chemical stability have been successfully synthesized by a solvothermal method. Owing to the intrinsic robustness of the framework and temperature-dependent luminescence behaviour of lanthanides, Eu3+/Tb3+-mixed MOFs ([(CH3)2NH2]Eu0.036Tb0.964BPTC) have also been successfully synthesized and targeted for developing excellent luminescent thermometers. The obtained mixed Ln-MOF exhibits ratiometric temperature sensing based on the distinguished characteristic emission of lanthanides with a wide temperature range from 77 K to 377 K. Particularly, the temperature sensor shows good linear responses from 220 K to 310 K with the maximum relative sensitivities (Sm) of 9.42% per K at 310 K. This value is comparable to those of the most excellent Ln-MOF thermometers reported. Besides, the temperature-dependent luminescent colours could also be systematically tuned from green, through yellow to red with increasing temperature, which can be clearly and directly observed even by the naked eye or a camera, thus also allowing colorimetric luminescence thermometry.

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Citations

Aug 28, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Th Yu Popelensky, V V Utochnikova
Jan 22, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Zeng-Gang LinWei-Sheng Liu
Apr 21, 2020·ACS Nano·Thomas HartmanBert M Weckhuysen

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