Front Cover: Optimizing the Eu3+ Concentration in Novel Eu-Doped Thermoplastic Polyurethane Films for the Development of Highly Emissive Red Flexible Material (Eur. J. Inorg. Chem. 25/2025)

Abstract

Flexible and luminescent Red-emissive films based on thermoplastic polyurethane (TPU) doped with different % wt of the europium complex Eu(TTA)₃bipy have been developed. A complete characterization was carried out by spectroscopic techniques, thermal analysis, AFM and SEM microscopy and X-ray diffraction; this allowed the interaction present in the materials to be understood. Interestingly, even with low concentrations, bright red emission with a QY close to 17% was achieved. Further details can be found in the Research Article by P. Fuentealba, Y. Gil and co-workers (DOI: 10.1002/ejic.202500018). The authors thank the Fondo Apoyo Pago de Publicaciones Científicas de la DI&DITT-FaCiQyF for financial support.