Two- and three-dimensional frameworks with (6,3) and (10,3)-a topology from self-assembly of three-connecting organic ligands with cadmium(II) and silver(I) salts

Assembly of three-connecting ligands 1,3,5-tris(1-imidazolyl)benzene (tib) and 1,3,5-tris(imidazol-1-ylmethyl)-2,4,6-trimethylbenzene (titmb) with cadmium(II) and silver(I) salts provide new metal-organic frameworks, [Cd(tib)(2)](NO3)(2)(.)4H(2)O (1), [Ag(tib)(PPh3)](CF3SO3) (2) and [Ag(titmb)(PPh3)](CF3SO3)(.)1.5H(2)O (3) (PPh3 = triphenylphosphine). Single-crystal X-ray diffraction studies reveal that complexes 1 and 3 are two-dimensional honeycomb networks, while complex 2 is a noninterpenetrated three-dimensional architecture with (10,3)-a topology. The results indicate that the nature (structure and flexibility) of the organic ligands and the bulky auxiliary ligand have great impact on the assembly and structure of metal-organic frameworks. The photoluminescent properties of the synthesized complexes were studied in the solid state at room temperature.