Studies on the radii dependent lanthanide self-assembly coordination behaviors of a flexible dicarboxylate ligand

Two new lanthanide coordination polymers {[Eu-2(BDOA)(3)(H2O)(2)]center dot 2H(2)O}nn (1) and {[Er-2(BDOA)(3)(H2O)(2)]}(n) (2) were synthesized by treating the corresponding lanthanide(III) chloride and a flexible ligand benzene-1,4-dioxyacetic acid (H-2-BDOA). Single-crystal X-ray studies reveal that the ligand BDOA(2-) adopts different coordination modes in these complexes. Self-assemblies between these bridging ligands and metal ions result in different three-dimensional coordination polymers. The luminescence property of 1 was investigated in the solid state at room temperature. (C) 2006 Elsevier B.V. All rights reserved.