title: A novel alkaline earth strontium(II) coordination polymer: poly[hexaaquatetrakis(μ5-pyridine-2,6-dicarboxylato)bis(μ4-pyridine-2,6-dicarboxylato)(μ7-sulfato)heptastrontium(II)].
abstract: The title compound, [Sr7(C7H3NO4)6(SO4)(H2O)6]n, has been synthesized by an ionothermal method using the ionic liquid 1-ethyl-3-methylimidazolium ([Emim]Br) as solvent, and characterized by elemental analysis, energy-dispersive X-ray spectroscopy, IR and single-crystal X-ray diffraction. The structure of the compound can be viewed as a three-dimensional coordination polymer composed of Sr(2+) cations, pyridine-2,6-dicarboxylate anions, sulfate anions and water molecules. The compound not only exhibits a three-dimensional structure with a unique coordination mode of the sulfate anion, but also features the first example of a heptanuclear strontium(II) coordination polymer. The structure is further stabilized by O-H···O hydrogen bonds and π-π stacking interactions.
authors.affiliation: Nanyang Medical College, Nanyang 473061, People's Republic of China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Analytical and Testing Centre, Nanyang Normal University, Nanyang 473061, People's Republic of China.
authors.forename: Shu-Guang
authors.initials: SG
authors.lastname: Qi
authors.affiliation: Analytical and Testing Centre, Nanyang Normal University, Nanyang 473061, People's Republic of China.
authors.forename: Yu-Quan
authors.initials: YQ
authors.lastname: Feng
mesh_terms: D006860:Hydrogen Bonding; D007477:Ions / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D013324:Strontium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D007477:Ions; D009942:Organometallic Compounds; D011108:Polymers; C000590245:poly(hexaaquatetrakis(mu5-pyridine-2,6-dicarboxylato)bis(mu4-pyridine-2,6-dicarboxylato)(mu7-sulfato)heptastrontium(II); D013324:Strontium
keywords: crystal structure; heptanuclear strontium(II) coordination polymer; hydrogen bonding; ionothermal synthesis; sulfate ligand