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Trannoy, V., Neto, A. C. N., Brites, C. D. S., Carlos, L. D. & Serier-Brault, H. (2021) Engineering of Mixed Eu3+/Tb3+ Metal-Organic Frameworks Luminescent Thermometers with Tunable Sensitivity. Advanced Optical Materials, 9 2001938.
Added by: Richard Baschera (2021-01-28 08:33:10) Last edited by: Richard Baschera (2021-07-01 08:14:49) |
| Type de référence: Article DOI: https://doi.org/10.1002/adom.202001938 Numéro d'identification (ISBN etc.): 2195-1071 Clé BibTeX: Trannoy2021 Voir tous les détails bibliographiques  |
Catégories: INTERNATIONAL, MIOPS Mots-clés: europium, luminescent thermometers, metal-organic frameworks, Tb-to-Eu energy transfer, terbium Créateurs: Brites, Carlos, Neto, Serier-Brault, Trannoy Collection: Advanced Optical Materials |
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| Liens URLs https://onlinelibr ... 002/adom.202001938 |
| Résumé |
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In the last decade, numerous Ln-bearing metal-organic frameworks (MOFs) have been reported for luminescence thermometry applications. Although the Ln3+ composition is always thoroughly determined, this parameter is never optimized to improve thermometric performances. Here, the optimization of thermometric performances of luminescent probes is tackled by reporting a series of mixed Eu3+–Tb3+ metal-organic frameworks. The thermometric performances are accessed as a function of the Eu3+ content yielding a maximum relative sensitivity between 0.19 and 0.44% K−1 registered at temperatures between 340 and 240 K, respectively. A meticulous theoretical investigation of the Tb3+-to-Eu3+ energy transfer in the series of mixed Eu3+–Tb3+ MOFs is also performed to determine the predominant pathway of the energy transfer. For the first time, a clear evidence of the significant influence of the Eu/Tb ratio on the energy transfer between Ln3+ emitting centers is presented that definitively determines the operating temperature range and the maximum relative sensitivity of the luminescent thermal probes.
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_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1002/adom.202001938
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