Mixed-Lanthanoid Metal-Organic Framework for Ratiometric Cryogenic Temperature Sensing.


A ratiometric thermometer based on a mixed-metal Ln(III) metal-organic framework is reported that has good sensitivity in a wide temperature range from 4 to 290 K and a quantum yield of 22% at room temperature. The sensing mechanism in the europium-doped compound Tb0.95Eu0.05HL (H4L = 5-hydroxy-1,2,4-benzenetricarboxylic acid) is based not only on phonon-assisted energy transfer from Tb(III) to Eu(III) centers, but also on phonon-assisted energy migration between neighboring Tb(III) ions. It shows good performance in a wide temperature range, especially in the range 4-50 K, reaching a sensitivity up to 31% K(-1) at 4 K.

DOI: 10.1021/acs.inorgchem.5b01924

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@article{Liu2015MixedLanthanoidMF, title={Mixed-Lanthanoid Metal-Organic Framework for Ratiometric Cryogenic Temperature Sensing.}, author={Xue Liu and Sebastiaan Akerboom and Mathijs de Jong and Ilpo Mutikainen and Stefania Tanase and Andries Meijerink and Elisabeth Bouwman}, journal={Inorganic chemistry}, year={2015}, volume={54 23}, pages={11323-9} }