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Thermochromism of highly luminescent photopolymer flexible films based on Eu (III) salts confined in polysulfone
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Orientador(es)
Resumo(s)
Here we discuss the influence of two different cations on the emissive properties of the highly emissive [Eu(fod)4]− anion. The studied Eu(III) salts were [C16Pyr][Eu(fod)4] (1), and the previously reported [Chol][Eu(fod)4]. C16Pyr stands for N-cetylpyridinium, Chol for cholinium and fod for 1,1,1,2,2,3,3-heptafluoro-7,7-dimethyloctane-4,6-dionate. 1 is classified as ionic liquid, with melting point close to 60◦C, and presented a luminescence quantum yield of (φ) 100%. Ultrabright emissive photopolymers were obtained for the first time using polysulfone as the host matrix. The films were prepared with incorporation of 10% (w/w) of 1 and [Chol][Eu(fod)4] in the polymeric matrix, which improved its thermal stability. Additionally, the luminescence of CholEu(fod)4/PSU presented a strong temperature dependence with a ratiometric thermal behavior.
Descrição
TUID/QUI/50006/2019
POCI-01-0145-FEDER-007265
IST-ID/077/2018
SFRH/BD/120985/2016
IST-ID/076/2018
SFRH/BPD/120599/2016
DL 57/2016
UIDB/00100/2020
UIDB/04349/2020
Palavras-chave
Europium (III), hybrid materials Lanthanide Polymer films Polysulfone Thermal behavior β-diketonate General Materials Science