OLEDs (organic light-emitting diodes) have become a viable alternative to the current technology market due to their lightness, low cost, and high image quality in displays. Consequently, our research group aims to synthesize and characterize coordination compounds based on quinoline ligands and study their luminescent properties. Initially, Eu(CF3SO3)3 soluble salt was used for the synthesis, and 8-hydroxyquinoline, 5-SO3-8-hydroxyquinoline (1), and 5-Cl-7-I-8-hydroxyquinoline (2), which are suitable coordinating ligands and have excellent luminescent properties. Then, four compounds were synthesized: [Eu(5-SO3H-8-hydroxyquinoline)3(H2O)2] (3), [Eu(5-SO3H-8-hydroxyquinoline)4] (4), [Eu(5-Cl-7-I-8-hydroxyquinoline)3(H2O)2] (5) and [Eu(5-Cl-7-I-8-hydroxyquinoline)4]. Finally, characterizations by spectroscopies techniques, such as UV-Vis, infrared (FTIR), NMR, and luminescence, were performed. Preliminary results are auspicious and indicate complexation, the probable conformation of the complexes, and their respective luminescence.