Crossed ladders in a 2-D mixed-ligand lanthanide coordination polymer: Synthesis, crystal structure and photoluminescence

A new metal-organic coordination polymer, [Ce(L-1)(L-2)(H2O)]center dot 2H(2)O (1, H2L1 = 2,6-dimethylpyridine-3,5-dicarboxylic acid, H2L2 = (E)-2,6-dimethyl-4-styrylpyridine-3,5-dicerboxylic acid), has been synthesized and characterized by elemental analysis, IR, and X-ray single-crystal diffraction. Compound 1 crystallizes in triclinic, space group P (1) over bar and displays a two-dimensional coordination network structure. In 1, the relatively rare crossed ladders constructed by mixed ligands organize a 2-D grid with the topology of (4(2)6)(2)(4(8)6(6)8), and the layers further build up a 3-D supramolecular architecture via interlaminar hydrogen bonds.