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Hydrothermal Synthesis, Crystal Structure and Properties of a Novel 3D Metal-organic Coordination Polymer with Helical Chains Based on 5-(Imidazol-1-ylmethyl)isophthalic Acid |
LI Fu-An;YANG Wei-Chun;MIAO Xu;LI Song-Tian |
College of Chemistry and Chemical Engineering,Pingdingshan University, Pingdingshan 467000, China |
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Abstract A novel 3D metal-organic coordination polymer with helical chains based on a flexible 5-(imidazol-1-ylmethyl)isophthalic acid (H2L) as a main ligand and 1,2-bis(4- pyridyl)ethane(bpa) as a N-containing ancillary ligand, [CdL(bpa)0.5]n (1), has been obtained under hydrothermal conditions and characterized by elemental analysis, powder X-ray diffraction (PXRD), IR, thermal gravimetric analyses (TGA) and single-crystal X-ray diffraction. It crystallizes in monoclinic, space group P21/c with a = 10.984(2), b = 10.1829(12), c = 17.782(3) Å, β = 123.156(11)º, V = 1665.1(5) Å3, Z = 4, Mr = 448.72, Dc = 1.790 g/cm3, Rint = 0.0871, F(000) = 892, the final R = 0.0687 and wR = 0.1294 for 2920 observed reflections (I 2σ(I)). In complex 1, the L2− anions connect Cd(II) ions to form two-dimensional metal-organic layers (Cd2L2)n, in which the 1D helical chains (Cd-L)n are alternately arranged in a right- and left-handed sequence. These layers are further linked to build a 3D network by the bpa ligand. In addtion, photo- luminescent properties for 1 are also investigated.
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Received: 30 June 2015
Published: 11 March 2016
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Fund:This project was supported by Education Chamber of Henan Province (No.15A150068) |
Corresponding Authors:
lifuanpds@163.com
E-mail: lifuanpds@163.com
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