| Abstract: The complex of {[Tb(3-IBA)3(H2O)2]·0.5(4,4′-bipy)}n (3-IBA=3-iodobenzoate; 4,4′-bipy=4,4′-bipyridine) was prepared by solvent method and further characterized by X-ray single crystal structural analysis, IR spectrum, UV spectrum, fluorescence spectrum, and thermogravimetric analysis. The complex crystallizes in triclinic crystal system and P1 space group with the cell dimensions: a=0.957 9(2) nm, b=1.020 3(2) nm, c=1.667 5(3) nm, α=95.4660(10)°, β=105.0010(10)°, γ=106.9940(10)°. The complex has 1D chain-like structure. Tb3+ ion is eight-coordinated by six oxygen atoms from five 3-IBA ligands and two oxygen atoms from water molecules. The adjacent Tb3+ ions are linked by two bidentate-bridging 3-IBA ligands forming 1D chain-like structure. The hydrogen bonds are formed between the free 4,4′-bipy molecules and the coordination water molecules, which connect the 1D chains into 2D network structure. Viewed along a-axis, there appear 1D channels caused by the partial overlapping between the benzene rings of the neighboring chains. The complex exhibits strong green fluorescence under ultraviolet light and the fluorescence spectrum has four main peaks at 490, 544, 583 and 619 nm, corresponding to 5D4→7F6、5D4→7F5、5D4→7F4 and 5D4→7F3 transition emissions of the Tb3+ ion, respectively. CCDC: 661739. |
