Chem. J. Chinese Universities

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Synthesis, Crystal Structure and Thermal Stability of Coordination Polymer [Co2(HO-BDC)2(bpe)2(H2O)2]n·n(py)·nH2O with Nanoscale C

ZHUO Xin1,2, PAN Zhao-Rui2, WANG Zuo-Wei2, LI Yi-Zhi2, ZHENG He-Gen2*   

    1. Photoelectric Chemistry Laboratory, Suzhou College, Suzhou 234000, China;
    2. Institute of Coordination Chemistry, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
  • Received:2006-11-13 Revised:1900-01-01 Online:2007-06-10 Published:2007-06-10
  • Contact: ZHENG He-Gen

Abstract: A novel coordination ploymer [Co2(HO-BDC)2(bpe)2(H2O)2]n·n(py)·nH2O[where HO-H2BDC is 5-hydroxyisophthalic acid and bpe is 1,2-bis(4-pyridyl)ethane, py is pyridine] with nanoscale channels was synthesized and characterized via elemental analysis, IR spectra and single-crystal X-ray diffraction. The crystal belongs to triclinic crystal system, space group P1, with a=1.0245(3) nm, b=1.1467(3) nm, c=1.2430(4) nm, α=68.915(5)°, β=67.163(4)°, γ=71.373(4)°, V=1.2279(6) nm3, Z=1, Mr=979.70, Dc=1.325 Mg/m3, F(000)=506, μ=0.740 mm-1, the final R1=0.0515 and wR2=0.1058 for 3625 observed reflections with I>2σ(I). The coordination polymer has a 2D rectangular grid framework parallel to the ac plane with a dimension of 1.025 nm×0.1354 nm via strong hydrogen-bonding interactions. TGA curves of the coordination polymer show three main weight losses in the range of 110—150 ℃, 200—300 ℃ and 320—450 ℃ corresponding to the removal of non-coordinatated water molecules, non-coordinatated py molecules and the water and bpe molecules attached to metal, respectively, and the final residue is identified to be Co2O3.

Key words: Co coordination polymer, 5-Hydroxyisophthalic acid, 1,2-Di(Pyridine)ethane, Crystal structure, Hydrogen bond

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