Atanassova M.Kurteva V.Billard I.2024-07-102024-07-102024-07-102024-07-102015-01-011348-22460910-634010.2116/analsci.31.917SCOPUS_ID:84945546719https://rlib.uctm.edu/handle/123456789/354Two Eu(III) complexes were synthesized using 4-acylpyrazolone ligands: 3-methyl-4-(4-methylbenzoyl)-1-phenylpyrazol-5-one (HPMMBP) and 3-methyl-1-phenyl-4-(4-phenylbenzoyl)-pyrazol-5-one (HPPMBP). The composition of the obtained solid complexes was determined as Eu(PMMBP) 3 .C 2 H 5 OH and Eu(PPMBP) 3 .3H 2 O based on elemental analysis and was further studied by IR, NMR and TG-TSC data. The lanthanoid complexation in solid state and in solution during liquid-liquid extraction (molecular diluent and ionic liquid) is discussed. 2015enArticle