Three ternary complexes featuring Eu³⁺ have been prepared by using primary ligand Kojic acid and secondary ligands 4-methyl-110-phenanthroline; 3,4,7,8-tetramethyl-110-phenanthroline and bathocuproine. Characterization of synthesized complexes was carried out using spectroscopic techniques: FTIR, elemental analysis, ESI-MS⁺, UV, TGA, FESEM, P-XRD, and Photoluminescence studies (PL). Results of P-XRD revealed that the complexes possess crystalline nature. Four specific emission peaks of Eu³⁺ have been noticed, corresponding to ⁵D₀ → ⁷F_J transitions, where J = 0–3 at about 580, 595, 614, and 650 nm, respectively. The Judd-Ofelt intensity parameters, radiative lifetime, quantum efficiency, branching ratio, and stimulated emission of complexes were determined. The CIE color coordinates revealed monochromatic red emission by the complexes with high color purity. The higher values of stimulated emission cross-sections and branching ratios of the complexes show that these complexes might be potentially applicable in laser systems. The CCT values below 5000 K suggest warm light emission by the complexes. The prepared ternary Eu³⁺ complexes have higher thermal stability of about 250 °C. Based on the result obtained from the above studies, these complexes could be a promising candidate for laser systems, optical applications, OLEDs, display devices, photophysical, and biomedical science.

通过使用一级配体曲酸和二级配体4-甲基-110-菲咯啉制备了三种具有Eu ^3+的三元配合物。3,4,7,8-四甲基-110-菲咯啉和红霉素。使用光谱技术对合成的复合物进行表征：FTIR，元素分析，ESI-MS ⁺，UV，TGA，FESEM，P-XRD和光致发光研究（PL）。P-XRD的结果表明该配合物具有晶体性质。注意到有四个特定的Eu ³⁺发射峰，分别对应于⁵ D ₀  →  ⁷ F _J跃迁，分别在大约580、595、614和650 nm处J = 0–3。确定了Judd-Ofelt强度参数，辐射寿命，量子效率，支化比和复合物的受激发射。CIE色坐标显示具有高色纯度的配合物发出单色红色。配合物的受激发射截面和支化比的较高值表明，这些配合物可能潜在地适用于激光系统。低于5000 K的CCT值表明配合物发出暖光。制备的三元Eu ³⁺配合物具有约250°C的较高热稳定性。根据以上研究获得的结果，这些络合物可能成为激光系统，光学应用，OLED，显示设备，光物理和生物医学领域的有希望的候选者。