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Article Navigation> JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY> 2009> 18(1): 79-83
YU Li-qiong, HUANG Ru-dan, CHI Ying-nan, XU Yan-qing, HU Chang-wen. Synthesis and Properties of a One-Dimensional Mixed-Ligand Cd(Ⅱ) Complex with Helical Structure[J]. JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2009, 18(1): 79-83.
Citation: YU Li-qiong, HUANG Ru-dan, CHI Ying-nan, XU Yan-qing, HU Chang-wen. Synthesis and Properties of a One-Dimensional Mixed-Ligand Cd(Ⅱ) Complex with Helical Structure[J].JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2009, 18(1): 79-83.
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Synthesis and Properties of a One-Dimensional Mixed-Ligand Cd(Ⅱ) Complex with Helical Structure

  • School of Science, Beijing Institute of Technology, Beijing 100081, China

  • Received Date:2008-01-18
    Abstract
  • The title complex, ·3H 2O] <em>n( 1 ) (Him is imidazole, OH-H 2BDC is 5-hydroxyisophthalic acid), was synthesized by liquid/liquid diffusion method at room temperature. The complex crystallizes in orthorhombic, space group P2 12 12 1, with a0.671?6(7), b1.380?6(2), c1.742?1(2)?nm, V1.615?2(3)?nm 3, C 11H 18CdN 2O 10, M r450.67, D c1.853?g/cm 3, μ1.407?mm -1, F(000)904, Z4, the final R 10.020?9 and wR20.045?3 for 3?211 observed reflections ( I>2 σ(I)). In the structure of 1 , the OH-BDC ligands exhibiting bis-bidentate coordination mode bridge the adjacent Cd centers to form a one-dimensional helical chain and the second ligand Him acting as terminal ligands are attached to the helical chain. It is notable that a series of complicated hydrogen bonds (e.g., N—H…O, O—H…O) exist in the structure, which link neighboring helices into a three-dimensional supramolecular architecture. An observed intense blue luminescence with an emission band peaking at 390?nm for 1 may be resulted from ligand-to-metal charge transfer (LMCT).
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