| Abstract: A complex {[Dy(1,2-pda)3/2(H2O)]·H2O}n (1,2-pda=1,2-phenyldendate ) has been prepared by hydro-thermal synthetical method and its structure was characterized by X-ray single-crystal diffraction. The complex belongs to monoclinic system with space group C2/c, a=2.627 18(9) nm, b=1.600 42(6) nm, c=0.764 41(3) nm, β=93.389(2)°. The Dy3+ ion is surrounded by six 1,2-pda ligands. Six pairs of 1,2-pda ligands link six adjacent Dy3+ ions to form hexagon [Dy(1,2-pda)6]2 clusters. These hexagon clusters are further bridged together through 1,2-pda ligands to form 3D network with (6,3) topologic structure. All 1,2-pda ligands coordinate Dy3+ ions in two coordination modes, bridging/chelating-bridging pentadentate and chelating-bridging/chelating-bridging hexadentate modes. In addition, each Dy3+ ion is coordinated by one water molecule. The nine-coordinated Dy3+ ion is in a distorted monocapped square-antiprism coordination sphere. The luminescence spectrum of the title complex was measured at the room temperature, and the two emission bands are at 481 and 574 nm, corresponding to the characteristic emission 4F5/2 → 6H15/2 and 4F5/2 → 6H13/2 transitions of Dy3+ ion. CCDC: 669663. |
