摘要Two new coordination polymers, [Ln(oba)(ox)0.5(H2O)2]n (Ln = Ho(1), Eu(2); H2oba = 4,4′-oxybis(benzoic acid), H2ox = oxalic acid) have been synthesized under hydrothermal conditions. According to single-crystal X-ray diffraction analyses, complex 1 crystallizes in the monoclinic system , space group P21/c with a = 13.783(2), b =10.0120(15), c = 12.1974(18) Å, β = 105.217(2)°, V = 1624.2(4) Å3, C15H12O9Ho, Mr = 501.18, Z = 4, Dc = 2.050 g/cm3, F(000) = 964, μ= 4.919 mm-1, λ (MoKα) = 0.71073 Å, GOOF = 1.124, the final R = 0.0239 and wR = 0.0570 for 3310 independent reflections with Rint = 0.0298. Complex 2 and 1 are isostructural. Oba and ox ligands bridge Ln(III) ions into 2D layers with (4,4) topology, which are further interlinked into a 3D supramolecular network by hydrogen bonds. TG curves of the two complexes are studied to examine their thermal stabilities. Additionally, complex 2 shows red fluorescence in the solid state at room temperature.
Two new coordination polymers, [Ln(oba)(ox)0.5(H2O)2]n (Ln = Ho(1), Eu(2); H2oba = 4,4′-oxybis(benzoic acid), H2ox = oxalic acid) have been synthesized under hydrothermal conditions. According to single-crystal X-ray diffraction analyses, complex 1 crystallizes in the monoclinic system , space group P21/c with a = 13.783(2), b =10.0120(15), c = 12.1974(18) Å, β = 105.217(2)°, V = 1624.2(4) Å3, C15H12O9Ho, Mr = 501.18, Z = 4, Dc = 2.050 g/cm3, F(000) = 964, μ= 4.919 mm-1, λ (MoKα) = 0.71073 Å, GOOF = 1.124, the final R = 0.0239 and wR = 0.0570 for 3310 independent reflections with Rint = 0.0298. Complex 2 and 1 are isostructural. Oba and ox ligands bridge Ln(III) ions into 2D layers with (4,4) topology, which are further interlinked into a 3D supramolecular network by hydrogen bonds. TG curves of the two complexes are studied to examine their thermal stabilities. Additionally, complex 2 shows red fluorescence in the solid state at room temperature.
2012, Vol. 31 
