Dinuclear terbium coordination polymer based on flexible ligand:: Synthesis, crystal structures and luminescence properties of Tb2(tda)3(H2O)2

The lanthanide coordination polymer, Tb(2)(tda)(3)(H(2)O)(2), and it's single crystals was self-assembled from thlodiglycolic acid (H(2)tda) and corresponding terbium(III) chlorides under hydrothermal conditions. Single-crystal structure shows that the compound presents a 2D network, an edge-sharing dinuclear polyhedral [Tb(2)O(16)] was found to be the building unit of the network, :in which the eight-coordinated TbO(8) and nine-coordinated TbO(9) cores exhibit distinct coordination environments, that is, one is in a distorted monocapped square antiprism surrounding and the other is in a triply capped trigonal prism. The H2tda ligand exhibits two different coordination modes in framework, including mode a: Bis "syn, syn-bridgilng bidentate, chelating-bridging tri'dentate", mode b: Bis"chelating-bridging bidentate, syn, anti-bridging bidentae". Eventually, through the Weak interaction, the networks formed 3D supramolecular architectures. Photoluminescence measurements indicate that the terbium compound is a. strong green emitter in the solid state at room temperature. Crystal data for the complex: triclinic, space group P1, with a= 0.794 66(8) nm, b=1.067 96(11) nm, c=1.433 23(14) nm, alpha=70.517 00(10)degrees, beta=75.648 0(2)degrees, gamma=76.9750(2)degrees, V= 1.097 26(19) nm(3), and Z=2.