Syntheses, Structures, and Photoluminescence of a Series of d10 Coordination Polymers with R-Isophthalate (R = -OH, -CH3, and -C(CH3)3)

Eight new d(10) metal-organic coordination polymers, [Zn(mip)(bpa)](n) (1), [Zn(mip)(bpp)](n) (2), [Cd(mip)(bpp)](n) (3), [Zn-2(tbip)(2)(bpa)(H2O)](n) (4), [Zn-2(tbip)(2)(dpe)(H2O)](n) (5), {[Zn(tbip)(bpp)]center dot H2O}(n) (6), {[Cd(tbip)(bpp)(H2O)]center dot 3H(2)O}(n) (7), and {[Cd(tbip)(H2O)(bipy)(0.5)]center dot H2O}(n) (8) were prepared through hydrothermal reactions of H(2)mip or H(2)tbip (H(2)mip = 5-methylisophthalic acid and H(2)tbip = 5-tert-butylisophthalic acid) with different pyridyl-containing ligands (bpa = 1,2-bis(4-pyridyl)ethane, bpp = 1,3-bis(4-pyridyl)propane, dpe = 1,2-di(4-pyridyl)ethene and bipy = 4,4'-bipyridine), respectively. Except for complexes 2 and 6, all the other six compounds were reported for the first time. These complexes were structurally characterized by elemental analysis, IR spectroscopy, and X-ray single-crystal diffraction. Complex I is a 3-fold interpenetrating three-dimensional (3D) network with CdSO4 topology constructed from alternately left-handed and right-handed helical channels. Complexes 2 and 3 are 4-fold interpenetrated diamondoid-like networks. Polymers 4 and 5 are isostructural, showing 2-fold 3D interpenetrating alpha-Po networks constructed from binuclear zinc nodes. Complex 6 possesses a two-dimensional (2D) corrugated network. Complex 7 has a one-dimensional (1D) tube-like chain along the alpha direction and is further linked by hydrogen bonding and pi-pi stacking interactions to form a 3D supramolecular network. Complex 8 features a 2D layer and further forms a 3D supramolecular framework by hydrogen bonding. These results show that the influence of steric hindrance of an organic ligand oil the structures of d(10) coordination polymers is realized through changing the substituted groups of the dicarboxylate derivatives. Furthermore, thermal stabilities and photoluminescent properties of the complexes were also Studied in the solid state.