| Abstract |
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 [C(16)Pyr][Eu(fod)(4)] (1), and the previously reported [Chol][Eu(fod)(4)]. C(16)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. 1 is classified as ionic liquid, with melting point close to 60 degrees C, and presented a luminescence quantum yield of (phi) 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. |
