Precision across temperatures: Eu/Tb luminescent thermometer with exceptionally high and stable sensitivity from 180 to 320 K

Luminescence thermometry, leveraging the temperature-dependent luminescent properties of coordination compounds, offers precise and remote temperature measurement. However, many existing luminescent thermometers exhibit a narrow peak in temperature sensitivity, restricting their effective operating...

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Bibliographic Details
Published in:Sensors and actuators. A. Physical. 2024-12, Vol.379, p.115969, Article 115969
Main Authors: Ivanova, Anna A., Polikovskiy, Trofim A., Gontcharenko, Victoria E., Korshunov, Vladislav M., Kiskin, Mikhail A., Taydakov, Ilya V., Belousov, Yury A.
Format: Article
Language:English
Subjects:
3-diketones
Energy transfer
Lanthanide ions
Luminescence thermometry
Temperature sensitivity
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Summary:Luminescence thermometry, leveraging the temperature-dependent luminescent properties of coordination compounds, offers precise and remote temperature measurement. However, many existing luminescent thermometers exhibit a narrow peak in temperature sensitivity, restricting their effective operating range. In this study, we synthesized new complexes [LnL2(NO3)(TPPO)2], where Ln = Eu (1), Tb (2), Gd (3), Tb0.94Eu0.06 (4), (HL - 4,4,4-trifluoro-1-(furan-2-yl) butan-1,3-dione, TPPO - triphenylphosphine oxide, which demonstrate an exceptionally wide and stable range of maximum temperature sensitivity of 3 %×K−1, spanning from 180 to 320 K. Furthermore, the temperature uncertainty remained low and stable across the same temperature region, ensuring reliable measurements. An unusual behavior was observed in the ion-to-ion energy transfer process rate constant, which exhibited an additional peak between 120 and 180 K. This phenomenon warrants further investigation to fully understand the underlying mechanisms. The obtained results allow for creation of new highly efficient luminescent thermometers tailored for specific complex applications, including cryobiology and microfluidics. [Display omitted] •Novel mixed Eu/Tb 1,3-diketonates were proposed for luminescence thermometry.•Stable thermal sensitivity Sr of 3 %×K−1 was observed from 180 to 320 K.•Mixed-metal complex shows temperature uncertainty less than
ISSN:0924-4247
DOI:10.1016/j.sna.2024.115969