A new dinuclear complex Europium(III) bis[(μ₂-ethoxy)(benzoyl trifluoroacetonato)(nitrate) (1, 10-phenanthroline) europium(III)]2 1, 10-phenanthroline, here after [Eu(μ₂-OC₂H₅)(btfa)(NO₃)(phen)]₂·phen)(1) (Figure 1a) and the mononuclear complex Eu(TTA)₃(Ph₃PO)₂(2) (Figure 2a) were synthesized and characterized by photoluminescence (PL) spectroscopy. The PL emission spectra of the powder samples of the compounds were recorded in the temperature range 10.7-300 K. Both complexes show rare metal-centered luminescence in the energy range characteristic of the Eu³⁺ ion (580-710 nm) with emission bands according to ion selection rule. The emission bands in the PL are attributed to the internal 4f → 4f radiative transitions of the Eu³⁺ ion ⁵D0 → ⁷Fi (i = 0→4) and, in addition, to the splitting of each level caused by the influence of the electric field of the ligands of the complex. Due to the splittings, each level is divided into 2i+1 sublevels, which are well observed in the mononuclear compound 2 centered at 580, 595, 615, 650, and 698 nm. However, in the PL spectrum of the dinuclear compound, the splits show a double number of splits (2(2i + 1)), which indicates the presence of two positions of the Eu3+ ion in the molecule and which are not optically equivalent.