Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/40224
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dc.contributor.authorPelluau, Tristanpt_PT
dc.contributor.authorSene, Saadpt_PT
dc.contributor.authorAli, Lamiaa M. A.pt_PT
dc.contributor.authorFélix, Gautierpt_PT
dc.contributor.authorManhes, Faustinept_PT
dc.contributor.authorNeto, Albano N. Carneiropt_PT
dc.contributor.authorCarlos, Luís D.pt_PT
dc.contributor.authorAlbela, Belénpt_PT
dc.contributor.authorBonneviot, Laurentpt_PT
dc.contributor.authorOliviero, Erwanpt_PT
dc.contributor.authorGary-Bobo, Magalipt_PT
dc.contributor.authorGuari, Yannickpt_PT
dc.contributor.authorLarionova, Jouliapt_PT
dc.date.accessioned2024-01-18T12:29:42Z-
dc.date.available2024-01-18T12:29:42Z-
dc.date.issued2023-09-21-
dc.identifier.issn2040-3364pt_PT
dc.identifier.urihttp://hdl.handle.net/10773/40224-
dc.description.abstractDespite the great effort made in recent years on lanthanide-based ratiometric luminescent nanothermometers able to provide temperature measurements in water, their design remains challenging. We report on the synthesis and properties of efficient ratiometric nanothermometers that are based on mesoporous stellate nanoparticles (MSN) of ca. 90 nm functionalized with an acetylacetonate (acac) derivative inside the pores and loaded with β-diketonate-Tb3+/Eu3+ complexes able to work in water, in PBS or in cells. Encapsulating a [(Tb/Eu)9(acac)16(μ3-OH)8(μ4-O)(μ4-OH)] complex (Tb/Eu ratio = 19/1 and 9/1) led to hybrid multifunctionalized nanoparticles exhibiting a Tb3+ and Eu3+ characteristic temperature-dependent luminescence with a high rate Tb3+-to-Eu3+ energy transfer. According to theoretical calculations, the modifications of photoluminescence properties and the increase in the pairwise Tb3+-to-Eu3+ energy transfer rate by about 10 times can be rationalized as a change of the coordination number of the Ln3+ sites of the complex from 7 to 8 accompanied by a symmetry evolution from Cs to C4v and a slight shortening of intramolecular Ln3+–Ln3+ distances upon the effect of encapsulation. These nanothermometers operate in the 20–70 °C range with excellent photothermal stability, cyclability and repeatability (>95%), displaying a maximum relative thermal sensitivity of 1.4% °C−1 (at 42.7 °C) in water. Furthermore, they can operate in cells with a thermal sensitivity of 8.6% °C−1 (at 40 °C), keeping in mind that adjusting the calibration for each system is necessary to ensure accurate measurements.pt_PT
dc.language.isoengpt_PT
dc.publisherRoyal Society of Chemistrypt_PT
dc.relationinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50011%2F2020/PTpt_PT
dc.relationinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50011%2F2020/PTpt_PT
dc.relationinfo:eu-repo/grantAgreement/FCT/Concurso para Financiamento de Projetos de Investigação Científica e Desenvolvimento Tecnológico em Todos os Domínios Científicos - 2020/PTDC%2FNAN-PRO%2F3881%2F2020/PTpt_PT
dc.relationinfo:eu-repo/grantAgreement/EC/H2020/801305/EUpt_PT
dc.rightsopenAccesspt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/pt_PT
dc.titleHybrid multifunctionalized mesostructured stellate silica nanoparticles loaded with β-diketonate Tb3+/Eu3+ complexes as efficient ratiometric emissive thermometers working in waterpt_PT
dc.typearticlept_PT
dc.description.versionpublishedpt_PT
dc.peerreviewedyespt_PT
degois.publication.firstPage14409pt_PT
degois.publication.issue35pt_PT
degois.publication.lastPage14422pt_PT
degois.publication.titleNanoscalept_PT
degois.publication.volume15pt_PT
dc.identifier.doi10.1039/d3nr01851bpt_PT
dc.identifier.essn2040-3372pt_PT
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