“…In a previous work we have described the luminescence properties of Eu(DPP) 3 [6], Gd 1−x Eu x (DPP) 3 [7], and La 1−x Eu x (DPP) 3 [8], with x varying from 0.50 to 0.99 (DPP, the anion of the diphenylphosphinic acid). In the present paper, we describe the synthesis, characterization and luminescent spectroscopic properties of the complexes Y 1−x Eu x (DPP) 3 , with x varying from 0 to 50% in molar concentration of Eu 3+ .…”