Modulating the photophysical properties of high emission Europium complexes and their processability

Europium polymeric complexes based on a variation of 2-thenoyltrifluoroacetone (TTA) and succinimide (SI) using K cations as a bridge with exceptional photophysical properties were obtained. The intensity of the photoluminescence increased from 53 to 300% compared with other efficient Eu complexes, also the quantum efficiency of the compounds reported in this work is higher than 75%, and its lifetime ranks from 0.65 to 0.8 ms. The formation of the coordination compounds of Europium containing both ligands, SI and TTA, and a potassium cation that forms polymeric units, allows the modulation of the energy transfer, and enhances the photophysical properties. Also, a variety of these compounds was used to fabricate polymeric films to demonstrate their potential processability.