A series of organopolymolybdate polymers linked by dual fuses: metal-organic moiety and organic ligand through Mo-N bonds

Three organopolymolybdate polymers, [Cu-2(bte)(2)(H2O)(gamma-Mo8O26)(0.5)] (1) (bte 1,2-bis(1,2,4-triazol-1-yl)ethane), [Cu(btb)(2)(H2O)(gamma-Mo8O26)(0.5)]center dot 2H(2)O (2) (btb 1,4-bis(1,2,4-triazol-1-y1) butane), and [Cu(bbtz)(H2O)(2)(gamma-Mo8O26)(0.5)] (3) (bbtz 1,4-bis(1,3,4-triazol-1-ylmethyl) benzene), were hydrothermally synthesized and structurally characterized. In compound 1, binuclear circles are exhibited, linked by [gamma-Mo8O26](4-) anions to construct one dimensional (1D) chains which connect with each other by Mo-N bonds to form two dimensional (2D) layers. These layers are linked through bte ligands to construct a three dimensional (3D) framework. In compound 2, two kinds of lines, inorganic lines [Cu1(gamma-Mo8O26)](2n-) and metal-organic lines [Cu-2(btb)](2n+), are connectd to form a chain which is further reinforced by btb ligands through Mo-N and Cu1-N bonds, respectively. By sharing the Cu1 ions, these chains construct 2D layers, which are further fused by bi-dentate btb ligands to form a 3D framework. Compound 3 shows a 1D chain, in which the [gamma-Mo8O26](4-) anions and binuclear circles arrange alternately linked by Cu-O bonds. The linkages are further strengthened by Mo-N bonds. The dual fuses for linking polymolybdate anions, metal-organic moiety and organic bis(triazole) ligand, are discussed in detail.