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Europium(III) and ytterbium(III) pentafluorobenzoates with 1,10-phenanthroline-2,9-dicarboxamides: ratiometric thermometry over a wide temperature range

Polina A Orlova 1
Polina A Orlova
,  , 
Daniil S Koshelev 1, 2
Daniil S Koshelev
, 
Leonid Sergeevich Lepnev 3
Leonid Sergeevich Lepnev
, 
Valentine Stanislavovich Petrov 2
Valentine Stanislavovich Petrov
, 
Pavel Sergeevich Lemport 2
Pavel Sergeevich Lemport
, 
Valentin Georgievich Nenajdenko 2
Valentin Georgievich Nenajdenko
, 
Valentina Vladimirovna Utochnikova 1, 2
Valentina Vladimirovna Utochnikova
10.71267/mencom.8094
Published 23 September 2026
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Orlova P. A. et al. Europium(III) and ytterbium(III) pentafluorobenzoates with 1,10-phenanthroline-2,9-dicarboxamides: ratiometric thermometry over a wide temperature range // Mendeleev Communications. 2026.
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Orlova P. A., Orlova A. V., Koshelev D. S., Lepnev L. S., Petrov V. S., Lemport P. S., Nenajdenko V. G., Utochnikova V. V. Europium(III) and ytterbium(III) pentafluorobenzoates with 1,10-phenanthroline-2,9-dicarboxamides: ratiometric thermometry over a wide temperature range // Mendeleev Communications. 2026.
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TY - JOUR
DO - 10.71267/mencom.8094
UR - https://mendcomm.colab.ws/publications/10.71267/mencom.8094
TI - Europium(III) and ytterbium(III) pentafluorobenzoates with 1,10-phenanthroline-2,9-dicarboxamides: ratiometric thermometry over a wide temperature range
T2 - Mendeleev Communications
AU - Orlova, Polina A
AU - Orlova, Anastasia Vadimovna
AU - Koshelev, Daniil S
AU - Lepnev, Leonid Sergeevich
AU - Petrov, Valentine Stanislavovich
AU - Lemport, Pavel Sergeevich
AU - Nenajdenko, Valentin Georgievich
AU - Utochnikova, Valentina Vladimirovna
PY - 2026
DA - 2026/09/23
PB - Mendeleev Communications
ER -
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@article{2026_Orlova,
author = {Polina A Orlova and Anastasia Vadimovna Orlova and Daniil S Koshelev and Leonid Sergeevich Lepnev and Valentine Stanislavovich Petrov and Pavel Sergeevich Lemport and Valentin Georgievich Nenajdenko and Valentina Vladimirovna Utochnikova},
title = {Europium(III) and ytterbium(III) pentafluorobenzoates with 1,10-phenanthroline-2,9-dicarboxamides: ratiometric thermometry over a wide temperature range},
journal = {Mendeleev Communications},
year = {2026},
publisher = {Mendeleev Communications},
month = {Sep},
url = {https://mendcomm.colab.ws/publications/10.71267/mencom.8094},
doi = {10.71267/mencom.8094}
}
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Keywords

complexes
lanthanide
luminescence
phenanthroline dicarboxamides
thermometry

Abstract

New Eu3+ and Yb3+ coordination compounds with 1,10-phenanthroline-2,9-dicarboxamide derivatives and pentafluorobenzoate were synthesized with the photoluminescence quantum yields up to 30% for Eu and 1.3% for Yb complexes, respectively. A systematic comparison of absolute intensity, lifetime, and luminescence intensity ratio thermometry demonstrated the superior reliability of the ratiometric approach. A bimetallic thin film of Yb(pfb)3L3:Eu3+ (0.18 mol% Eu) enabled temperature sensing from −196 to +120 °C with a relative sensitivity of 5.9% K–1, making it promising for applications in space technologies.

Funders

Russian Science Foundation
25-73-00157

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