| Summary: | Here we discuss the influence of two different cations on the emissive properties of the highly emissive [Eu(fod)<sub>4</sub>]<sup>−</sup> anion. The studied Eu(III) salts were [C<sub>16</sub>Pyr][Eu(fod)<sub>4</sub>] (<b>1</b>), and the previously reported [Chol][Eu(fod)<sub>4</sub>]. C<sub>16</sub>Pyr stands for N-cetylpyridinium, Chol for cholinium and fod for 1,1,1,2,2,3,3-heptafluoro-7,7-dimethyloctane-4,6-dionate. <b>1</b> 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% (<i>w</i>/<i>w</i>) of <b>1</b> and <b>[Chol][Eu(fod)<sub>4</sub>]</b> in the polymeric matrix, which improved its thermal stability. Additionally, the luminescence of <b>CholEu(fod)<sub>4</sub>/PSU</b> presented a strong temperature dependence with a ratiometric thermal behavior.
|
|---|