Construction of metal-organic coordination polymers derived from 4-substituted tetrazole-benzoate ligands: synthesis, structure, luminescence, and magnetic behaviors

Using 4-substituted tetrazole-benzoate ligands, 4-aminophenyl-1H-tetrazole (HL1) and 4-carboxyphenyl-1H-tetrazole (H2L2), five metal-organic coordination polymers formulated as [Co-3(OH)(2)(L-1)(4)(H2O)(2)](2n) (1), [Zn(L-1)(2)](n) (2), [Ag(L-1)](n) (3), [Co(L-2)(H2O)](n) (4) and [Pb(L-2)](n) (5) have been hydro(solvo)thermally synthesized and structurally characterized by single-crystal X-ray diffraction. Due to the effects of the different metal centers and the substituted groups of ligands, such as -NH2 and -COOH, compounds 1-5 demonstrate different characteristics. Compound 1 features a 3D framework with a rare (3,6)-connected rtl (rutile) topology. Compound 2 crystallizes in a noncentrosymmetric space group P (4) over bar n2 and manifests a 3D non-interpenetrated dia framework. Compound 3 shows a 2D layer structure with 3-connected 4.8(2)-fes topology. Compound 4 exhibits a uninodal 8-connected body-centered cubic (bcu) net with a Schlafli symbol of 4(24).6(4). Compound 5 possesses a 3D framework with 5-connected 4(6).6(4)-bnn (hexagonal boron nitride) topology. Luminescent studies show that compounds 1-5 exhibit good solvent-dependent properties, especially in their response towards acetonitrile, carbon tetrachloride and acetone molecules. In addition, compound 1 shows spin-canted antiferromagnetism at low temperature.