Hydrothermal synthesis and structural studies of a new coordination polymer of lanthanum（Ⅲ） with benzene-1,2,4,5-tetracarboxylic acid and 4,4′-bipyridine
来源期刊：Journal of Rare Earths2009年第3期
论文作者：Masoumeh Tabatabaee Mahboubeh A. Sharif Fatemeh Vakili Saina Saheli
文章页码：356 - 361
摘 要：A new lanthanum complex formulated as {（bpyH2） [La（btc）（H2O） 4（NO3） ]·2H2O}n（1） （btcH4=benzene-1,2,4,5-tetracarboxylic acid;bpy=4,4′-bipyridine） was hydrothermally synthesized. The complex was characterized by FT-IR spectroscopy,elemental analysis and X-ray diffraction. X-ray crystal structural analysis revealed that the compound belonged to the monoclinic space group C2/c with cell parameters a= 1.42806（7） nm,b=1.10258（5） nm,c=1.60333（8） nm and β=101.9400（10） °. The complex was polymeric with LaIII atoms linked by four O atoms from two carboxylate groups of one benzene-1,2,4,5-tetracarboxylate. The LaIII atom was ten coordinated in a distorted tetracapped trigonal prism. In the crystal structure,a wide range of noncovalent interactions consisting of hydrogen bonding（of the types of O-H···O,N-H···O and C-H···O） and ion pairing interactions connected the various components into a supramolecular structure.
Masoumeh Tabatabaee1，Mahboubeh A. Sharif2，Fatemeh Vakili1，Saina Saheli1
1. Department of Chemistry,Islamic Azad University Yazd Branch2. Department of Chemistry,Islamic Azad University Qom Branch
摘 要：A new lanthanum complex formulated as {（bpyH2） [La（btc）（H2O） 4（NO3） ]·2H2O}n（1） （btcH4=benzene-1,2,4,5-tetracarboxylic acid;bpy=4,4′-bipyridine） was hydrothermally synthesized. The complex was characterized by FT-IR spectroscopy,elemental analysis and X-ray diffraction. X-ray crystal structural analysis revealed that the compound belonged to the monoclinic space group C2/c with cell parameters a= 1.42806（7） nm,b=1.10258（5） nm,c=1.60333（8） nm and β=101.9400（10） °. The complex was polymeric with LaIII atoms linked by four O atoms from two carboxylate groups of one benzene-1,2,4,5-tetracarboxylate. The LaIII atom was ten coordinated in a distorted tetracapped trigonal prism. In the crystal structure,a wide range of noncovalent interactions consisting of hydrogen bonding（of the types of O-H···O,N-H···O and C-H···O） and ion pairing interactions connected the various components into a supramolecular structure.
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