Two novel inorganic-organic hybrid materials constructed from two kinds of octamolybdate clusters and flexible tetradentate ligands.

Two novel hybrid materials based on two kinds of octamolybdate anions and metal-organic frameworks (MOFs), namely, [Ag(8)(L(1))(4)(α-Mo(8)O(26))(β-Mo(8)O(26))(H(2)O)(3)]·H(2)O (1) and [Cu(I)(3.1)Cu(II)(0.5)(β-Mo(8)O(26))(0.5)(ζ-Mo(7)(VI)Mo(V)O(26))(0.5)(L(2))(2)(H(0.8)L(2))(0.5)] (2), where L(1) = 1,1'-(1,3-propanediyl)bis[2-(4-pyridyl)benzimidazole] and L(2) = 1,1'-(1,4-butanediyl)bis[2-(3-pyridyl)benzimidazole], have been successfully synthesized. Crystal structure analysis revealed that 1 is a three-dimensional (3D) framework constructed of silver(I)-organic sheets and two types of (Mo(8)O(26))(4-) isomers. Compound 2 is a rare 3D framework containing copper(I,II)-organic cages and 1D channels occupied by the (ζ-Mo(7)(VI)Mo(V)O(26))(5-) and (β-Mo(8)O(26))(4-) anions. The two compounds were characterized by elemental analysis, IR spectroscopy, diffuse reflectivity spectroscopy, and photoluminescent spectroscopy. In addition, the photocatalytic behavior of 1 was investigated.