| Abstract: Reaction of Tb2(ox)3·6H2O and cyclohexane-1,2,3,4,5,6-hexacarboxylic acid hydrate (H6LⅠ·H2O) (cis-chair conformation LⅠ: a,e,a,e,a,e) resulted in formation of a novel three-dimensional lanthanide coordination polymer [Tb4(LⅡ)(ox)3(H2O)8] (trans-chair conformation LⅡ: e,e,e,e,e,e; ox: oxalate) under hydrothermal condition, which was characterized by elemental analysis and IR. X-ray diffraction crystal structure analysis shows that the complex crystallizes in triclinic system, space group P1 with a=0.602 03(4) nm, b=1.082 78(8) nm, c=1.294 46(9) nm, α=67.908 0(10)°, β=82.109 0(10)°, γ=83.887 0(10)°, V=0.773 07(9) nm3, Z=2. In the formation of the complex, the cis-chair H6LⅠ ligand transformed to the trans-chair LⅡ ligand, which adopts μ8-bridging mode connecting the Tb atoms to form two-dimensional (Tb-LⅡ) layers with channels. The one-dimensional (Tb-ox) chains bridged by μ2- and μ4-ox ligands link the (Tb-LⅡ) layers to generate a three-dimensional framework with channels, which were filled with ox ligands and water molecules through coordination and hydrogen interactions. CCDC: 790926. |
