Syntheses,crystal structures,and magnetic studies of two cobalt(II) coordination polymers based on concurrent ligand extension |
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| Affiliation: | 1. College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan 471022, PR China;2. College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, Henan 473061, PR China;1. Department of Chemistry Education and Green-Nano Materials Research Center, Kyungpook National University, Daegu 702-701, Republic of Korea;2. Department of Chemistry, Kyungpook National University, Daegu 702-701, Republic of Korea;3. Department of Applied Chemistry, Kyungpook National University, Daegu 702-701, Republic of Korea |
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| Abstract: | An ether bridged tetracarboxylic acid ligand, 5-(3′,4′-Dicarboxylphenoxy)-isophthalic acid (H4L) was used to construct two Co(II) coordination polymers in presence of different nitrogen donor ligands such as 4,4′-bipyridine (4,4′-bpy) and 4,4′-bis(pyrid-4-yl)biphenyl (bpbp). The products formed under hydrothermal conditions are formulated as Co2L(4,4′-bpy)2(H2O)3]n (1) and {Co(bpbp)2(H2L)]·H2O}n (2). The compounds were characterized by single-crystal X-ray diffraction, IR spectroscopy, elemental analysis, and powder X-ray diffraction (PXRD) measurement. Compound 1 shows an intriguing (3,4,5)-connected 3D framework with a point symbol of (42 · 62 · 82)(42 · 65 · 83)(62 · 8). Compound 2 is an unusual 3D supramolecular framework generated by the one-dimensional Co(bpbp)(H2L)]n polymer chain. The magnetic properties of compounds 1 and 2 were examined, indicating antiferromagnetic interactions between the cobalt(II) ions in the temperature range of 2–300 K. |
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