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 M11 （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）（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 （H2bpp） ligand and nickel cation in the presence of 1,10-phenanthroline （phen） affords one new coordination polymer （CPs）, [Ni（bpp）（phen）（H20]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 Nin in 1 are linked via bpp2 to form chains, which are further connected through non-covalent interactions （including O-H...O and n...zr interactions） to form a 3D packing diagram. The crystal ofl crystallizes in triclinic, space group PI with a = 10.998（10）, b = 12.019（10）, c = 12.485（11） A, a = 75.774（14）, β = 85.828（16）, y = 66.542（13）°, V= 1467（2）/k^3, Z = 2, C38H26N2O5Ni, Mr= 649.32, Dc = 1.470 g/cm^3, F（000） = 672 andμ（MoKa） = 0.721 mm-1. The final R = 0.0692 and wR = 0.1048 for 5116 observed reflections with/〉 20（/） andR = 0.0874 and wR = 0.1364 for all data.
