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Two complexes [Eu2(2-TFMBA)6(2,2’-bipy)2]·2H2O (1) and Eu2(2-TFMBA)6(1,10-phen)2 (2) (2-TFMBA=2-(Trifluoromethyl) benzoate; 2,2’-bipy=2,2’-bipyridine; 1,10-phen=1,10-phenanthroline) were synthesized by solvent method and determined by X-ray diffrac-tion analysis. Complex 1 crystallizes in monoclinic system with space group P21/c, whereas complex 2 crystallizes in triclinic system with space group Pī. Both are binuclear molecules with an inversion center. In complex 1, two center Eu3+ ions are linked together by four 2-TFMBA ligands in bidentate-bridging mode. Each Eu3+ ion is eight-coordinated with six O atoms from five 2-TFMBA ligands and two N atoms from one 2,2’-bipy molecule. In complex 2, two center Eu3+ ions are linked together by four 2-TFMBA ligands in two modes, namely, bidentate-bridging and tridentate-bridging. Each Eu3+ ion is nine-coordinated with seven O atoms from five 2-TFMBA ligands and two N atoms from one 1,10-phen molecule. The two complexes both exhibited strong red fluorescence under ultraviolet light, and the 5D0→7Fj (j=0–4) transition emissions of Eu3+ ion were observed in their emission spectra.
Two complexes [Eu2 (2-TFMBA) 6 (2,2’-bipy) 2] · 2H2O (1) and Eu2 (2-TFMBA) 6 - (Trifluoromethyl) benzoate; 2,2’-bipy = 2,2’-bipyridine; 1,10-phen = 1,10-phenanthroline) were synthesized by solvent method and determined by X-ray diffrac- tion analysis. crystallizes in monoclinic system with space group P21 / c, whereas complex 2 crystallizes in triclinic system with space group Pī. Both areuclear molecules with an inversion center. In complex 1, two centers Eu3 + ions are linked together by four 2-TFMBA ligands in bidentate-bridging mode. Each Eu3 + ion is eight-coordinated with six O atoms from five 2-TFMBA ligands and two N atoms from one 2,2’-bipy molecule. In complex 2, two centers Eu3 + ions are linked together by four 2 -TFMBA ligands in two modes, namely, bidentate-bridging and tridentate-bridging. Each Eu3 + ion is nine-coordinated with seven O atoms from five 2-TFMBA ligands and two N atoms from one 1,10-phen molecule. The two complexes both exhibited strong red fluorescence under ultraviolet light, and the 5D0 → 7Fj (j = 0-4) transition emissions of Eu3 + ion were observed in their emission spectra.