Series of Inorganic-Organic Hybrid Materials Constructed From Octamolybdates and Metal-Organic Frameworks: Syntheses, Structures, and Physical Properties

Series of inorganic organic-hybrid materials based on octamolybdates, silver ions, and multidentate N-donor ligands, namely, [Ag-2(2,3'-tmbpt)(beta-Mo8O26)(0.5)] (1), [Ag-2(2,4'-tmbpt)(2)(alpha-Mo8O26)(0.5)(H2O)(0.5)]center dot 2H(2)O (2), [Ag-3(3,3'-tmbpt)(2)(alpha-H2Mo8O26)(0.5)(beta-Mo8O26)(0.5)]center dot 3.5H(2)O (3), [Ag-2(3,3'-tmbpt)(epsilon-Mo8O26)(0.5)]center dot 1.75H(2)O (4), [Ag-2(3,4'-tmbpt)(2)(beta-Mo8O26)(0.5)]center dot 0.5H(2)O (5), and [Ag(3,4'-Htmbpt)(beta-Mo8O26)(0.5)] (6), where 2,3'-tmbpt = 1-((1H-1,2,4-triazol-1-yl)methyl)-3-(3-pyridyl)-5-(2-pyridyl)-1,2,4-triazole), 2,4'-tmbpt = 1-((1H-1,2,4-triazol-1-yl)methyl)-3-(4-pyridyl)-5-(2-pyridyl)-1,2,4-triazole), 3,3'-tmbpt = 1((1H-1,2,4-triazol-1-yl)methyl)-3,5-bis(3-pyridyl)-1,2,4-triazole, and 3,4'-tmbpt = 1-((1H-1,2,4-triazol-1-yl)methyl)-3-(4-pyridyl)-5-(3-pyridyl)-1,2,4-triazole) have been synthesized under hydrothermal conditions. Compound 1 displays a rare 3D (3,4,8)-connected net with (4.8(2))(4(2).8(4))(4(3).8(20).10(5)) topology. Compound 2 shows a rare 3D (4,6)-connected self-catenated framework with (6(4).8(2))(4(2).6(3).8(2))(4(2).6(8).8(4).10) topology. Compound 3 is a scarce 3D framework based on two different kinds of [Mo8O26](4-) isomers. Compound 4 exhibits a 3D framework constructed by silver-organic sheets and the rare [epsilon-Mo8O26](4-) anions. Compound 5 shows an interesting 1D -> 2D polythreaded structure. Compound 6 displays a 2D layer structure, which is further linked by the N-H center dot center dot center dot O hydrogen bonds to form a 3D supramolecular architecture. Their structures have been further characterized by infrared spectra (IR), elemental analyses, powder X-ray diffraction (PXRD), electrochemistry and photoluminesce. Moreover, the photocatalytic activities for degradation of organic pollutant have been investigated for compounds 3-6.