Ternary lanthanide complexes of 3-((4,6-dimethyl-2-pyrimidinyl)thio)-propanoic acid and 1,10-phenanthroline: Crystal structure and photoluminescent property

Two ternary lanthanide complexes, [Eu(L)(3)(Phen)](2)center dot 2H(2)O (1) and [Tb(L)(3)(Phen)](2)center dot 2H(2)O (2), based on 3-((4,6-dimethyl-2-pyrimidinyl)thio)-propanoic acid (HL) and 1,10-phenanthroline (Phen) were prepared and structurally characterized. Single-crystal X-ray diffraction analyses reveal that they are isostructural. Two lanthanide ions (Ln) are bridged by four carboxylate ligands. The rest two carboxylate ligands and Phen coordinate with Ln with bidentate chelating mode, forming the dimeric arrangement. The coordination number of Ln is nine with a distorted mono-capped square antiprismatic coordination polyhedron. The solid-state photoluminescent measurements suggest that both complexes showcase the characteristic emission bands of the metal center.