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Europium(III)-Doped Gadolinium(III) Complex for High-Sensitivity Temperature Sensing in the Physiological Range

A new Eu(3+)-doped Gd(3+) complex of formula [Eu(0.0135)Gd(0.9865)(pta)(3)me-phen] was synthesized and structurally characterized (Hpta = benzoyltrifluoroacetone, me-phen = 5-methyl-1,10-phenanthroline). The photoluminescence study revealed that when the compound was excited at RT, under a 457 nm co...

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Detalles Bibliográficos
Autores principales: Soler-Carracedo, Kevin, Díaz-González, María, Martin, Inocencio R., Rios, Susana, Gil-Hernández, Beatriz, Brito-Santos, Gabriela, Sanchiz, Joaquín
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9653586/
https://www.ncbi.nlm.nih.gov/pubmed/36363093
http://dx.doi.org/10.3390/ma15217501
Descripción
Sumario:A new Eu(3+)-doped Gd(3+) complex of formula [Eu(0.0135)Gd(0.9865)(pta)(3)me-phen] was synthesized and structurally characterized (Hpta = benzoyltrifluoroacetone, me-phen = 5-methyl-1,10-phenanthroline). The photoluminescence study revealed that when the compound was excited at RT, under a 457 nm continuous laser, the material exhibited high luminescence due to the antenna effect of the ligands, as well as a good balance between the phosphorescence from the spin-forbidden triplet (from the organic ligands), and the characteristic lanthanide f-f transitions. The ratio between the previous emissions drastically changed when the sample was heated up to 62 °C inside a tubular furnace. This ratio was investigated using the luminescence intensity ratio method, to analyze the capabilities of the sample as a temperature sensor. The relative sensitivity reached a maximum of 11.4 °C(−1) %, maintaining a detection limit below 0.15 °C for the whole temperature range.