| Abstract: | Three new complexes, [Eu(2-IBA)3?·?H2O] n (1), [Eu(2-IBA)3?·?2,2′-bpy]2 (2), and [Eu(2-IBA)3?·phen]2 (3) (2-IBA?=?2-iodobenzoato; 2,2′-bpy?=?2,2’-bipyridine; phen?=?1,10-phenanthroline) were synthesized, and their crystal structures determined by X-ray diffraction. In complex 1, Eu3+ ions are linked through carboxylate groups via bridging – chelating – bridging coordination modes to form a one-dimensional polymeric chain. The carboxylate groups are tetradentate-bridged. Complex 2 is binuclear with an inversion center, in which europium is nine-coordinated with seven oxygen atoms from five 2-IBA ligands and two nitrogen atoms from one 2,2′-bpy molecule in a distorted monocapped square antiprism. The crystal structure of 3 is similar to that of 2. These complexes emit red light luminescence. The 5 D 0?→?7 F j (j?=?1–4) transition emission of Eu3+ ion has been observed. |
