Solvothermal reactions of 3,5-dimethyl-2,6-bis(3-(pyrid-2-yl)-1,2,4-triazolyl) pyridine (L), 1,4-benzendicarboxylic acid (H2bdc), and transitional metal cations of MII (M = Mn, Co, Cd) in the presence of oxalic acid (H2ox) afford three novel supramolecular polymers (CPs), namely, {[M2(ox)(L)2][bdc][M2(Hox)2(OH)2(H2O)4].3H2O}n (M=Mn for 1, Co for 2, Cd for 3). Single-crystal X-ray diffraction analysis reveals that complexes 1-3 are isostructural and the 3D supramolecular structure was connected through non-covalent interactions. With the help of H2ox, the L ligands cheated with center atoms forming a butterfly [M2(ox)(L)2]2+ building block. The bdc2- ligand linked with the unprecedented [M2(Hox)2(OH)2(H2O)4] units through strong O-H…O hydrogen bonds forming a zigzag chain, which are further connected through π…π interactions between L and bdc2- ligands to form a 3D supramolecular structure. Moreover, elemental analyses, IR, thermogravimetric, PXRD and luminescence have been investigated.
Solvothermal reaction of aromatic 2,6-bis(4 -carboxyphenyl)-4-phenylpyridine (H 2 bpp) ligand and nickel cation in the presence of 1,10-phenanthroline (phen) affords one new coordination polymer (CPs), [Ni(bpp)(phen)(H2O]n (1). The structure has been determined by single-crystal X-ray diffraction analysis and further characterized by elemental analyses, IR, PXRD and luminescence. Ions of NiⅡ in 1 are linked via bpp2- to form chains, which are further connected through non-covalent interactions (including O-H···O and π···π interactions) to form a 3D packing diagram. The crystal of 1 crystallizes in triclinic, space group P1 with a = 10.998(10), b = 12.019(10), c = 12.485(11) , α = 75.774(14), β = 85.828(16), γ = 66.542(13)°, V = 1467(2)3 , Z =2, C38H26N2O5Ni, Mr = 649.32, Dc = 1.470 g/cm3 , F(000) = 672 and μ(MoKα) = 0.721 mm -1 . The final R = 0.0692 and wR = 0.1048 for 5116 observed reflections with I > 2σ(I) and R = 0.0874 and wR = 0.1364 for all data.
