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A novel europium(Ⅲ) coordination polymer, [Eu3(pydc)3(SO4)(H2O)5(ox)0.5]·3H2O(1, H2 ox = oxalic acid, H2 pydc = pyridine-2,6-dicarboxylic acid), has been synthesized hydrothermally from the self-assembly of lanthanide ions(Eu3+) with the flexible oxalic acid and the rigid pyridine-2,6-dicarboxylic acid ligands, respectively. It crystallizes in the triclinic system, space group P1 with a = 11.225(4), b = 12.390(5), c = 13.752(5)A, α = 89.228(7), β = 71.142(6), γ = 75.552(6)°, Dc = 2.317 g/cm3, μ = 5.480 mm-1, F(000) = 1150, Z = 2, the final R = 0.0351 and w R = 0.0949 for 8782 observed reflections with I > 2σ(I). Structural analysis reveals that complex 1 exhibits a three-dimensional metal-organic framework via π-π stacking interactions. In addition, complex 1 displays a red fluorescence emission in the solid state at room temperature, which corresponds to the 5D0 → 7F2 transition of Eu3+ ions.
A novel europium (Ⅲ) coordination polymer, [Eu3 (pydc) 3 (SO4) (H2O) 5 (ox) 0.5] · 3H2O (H2ox = oxalic acid, H2pydc = pyridine-2,6- dicarboxylic acid) , has been synthesized hydrothermally from the self-assembly of lanthanide ions (Eu3 +) with the flexible oxalic acid and the rigid pyridine-2,6-dicarboxylic acid ligands, respectively. It crystallizes in the triclinic system, space group P1 with a = 11.225 Α = 89.228 (7), β = 71.142 (6), γ = 75.552 (6) °, Dc = 2.317 g / cm 3, μ = 5.480 mm-1, F (000) = 1150, Z = 2, the final R = 0.0351 and w R = 0.0949 for 8782 observed reflections with I> 2σ (I). Structural analysis reveals that complex 1 exhibits a three-dimensional metal -organic framework via π-π stacking interactions. In addition, complex 1 displays a red fluorescence emission in the solid state at room temperature, which corresponds to the 5D0 → 7F2 transition of Eu3 + ions.