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Viravaux, C., Oms, O., Dolbecq, A., Nassar, E., Busson, L., Mellot-Draznieks, C., Dessapt, R., Serier-Brault, H. & Mialane, P. (2021) Temperature sensors based on europium polyoxometalate and mesoporous terbium metal-organic framework. J. Mater. Chem. C,
Added by: Richard Baschera (2021-07-02 13:53:11) Last edited by: Richard Baschera (2021-07-02 13:54:48) |
| Type de référence: Article DOI: 10.1039/D1TC01532J Numéro d'identification (ISBN etc.): 2050-7534 Clé BibTeX: Viravaux2021 Voir tous les détails bibliographiques  |
Catégories: MIOPS Créateurs: Busson, Dessapt, Dolbecq, Mellot-Draznieks, Mialane, Nassar, Oms, Serier-Brault, Viravaux Collection: J. Mater. Chem. C |
Consultations : 1/432
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| Liens URLs https://pubs.rsc.o ... 2021/tc/d1tc01532j |
| Résumé |
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The first example of ratiometric luminescent thermometers based on lanthanide molecular species encapsulated in a lanthanide metal–organic framework (MOF) is reported. In EuW10@Tb-TATB, the [EuW10O36]9− polyoxometalate (POM) is incorporated into the cavities of the mesoporous terbium MOF Tb-TATB with two different POM loadings (9.1 and 19.5 wt%). Eu3+ and Tb3+ ions of the POM and MOF, respectively, act as dual emitters. Optical measurements evidence efficient Tb3+-to-Eu3+ energy transfer, suggesting that the EuW10 units are close to terbium centers. These observations are supported by computational investigations whereby a favored localisation of the EuW10 POM in the MOF's pores is found close to Tb-centers evidencing hydrogen bond type interactions between terminal oxygen atoms of the POM and Tb-coordinated water molecules. The reported materials act as temperature sensors in the physiological domain, exhibiting high relative thermal sensitivities of 2.68% K−1 and 2.37% K−1 at 300 K for the 9.1 wt% and 19.5 wt% composites, respectively, with a thermal uncertainty of 0.09 K.
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Publisher: The Royal Society of Chemistry
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