Hydrothermal synthesis, structure, and photoluminescence of four complexes based on lH-imidazole-4,5-dicarboxylate or lH-imidazole-2-carboxylate ligands

摘要

Four complexes, [Ag_4(bipy)_2(Himdc)_2(H_2O)_2]? (1), [Ag(H_2imdc)]_? (2), [K(H_3imdc) (H_2imdc)(H_2O)_2]_n (3), and [Cu(Himc)_2] (4) (H_3imdc = lH-imidazole-4,5-dicarboxylic acid, H_2imc=lH-imidazole-2-carboxylic acid, and bipy = 4,4'-bipyridine), were hydro thermally synthesized and characterized by single-crystal X-ray diffraction analysis and elemental analysis. The obtained complexes exhibit different coordination structures; 1 contains a 2-D supramolecular layer based on two chains arraying uniformly in an ABAB manner. Compound 2 displays sawtooth-shaped 1-D chains extending to 2-D layers via hydrogen bond interactions. Compound 3 possesses a 3-D framework structure based on a 1-D chain via hydrogen bonding interactions. Compound 4 has a 3-D framework structure bearing a pcu-type topology. In addition, the photoluminescence for 1 has been investigated.