Two new octamolybdate-based metal–organic polymers: Structures, semiconducting and photoluminescent properties

Two new octamolybdate-based inorganic–organic hybrid compounds NiII(HL)2(H2O)2(β-Mo8O26) (1) and CuI4L4(β-Mo8O26) (2) (L = 3-((1H-1,2,4-triazol-1-yl)methyl)pyridine) have been hydrothermally synthesized and structurally characterized. Compound 1 is built up of octamolybdate anions [β-Mo8O26]4− covalently linked by [Ni(HL)2(H2O)2]4+ cations into 1D infinite chains and was further connected by hydrogen bonds into a 3D supramolecular structure. Compound 2 is constructed from [β-Mo8O26]4− building blocks and [Cu2L2]2n4n+ strands to form a 3-connected 2D network. Furthermore, the diffuse reflectance spectra reveal that these two inorganic–organic hybrid compounds are potential wide gap semiconductor materials.