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A twofold interpenetrated 3-D Cu(II) coordination polymer based on 5-(pyridin-4-yl)isophthalic acid: synthesis, crystal structure, and magnetic properties

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A new copper(II) coordination polymer, [Cu(PIA)·2H2O]n (1) [H2PIA = 5-(pyridin-4-yl)isophthalic acid], has been synthesized and characterized by elemental analysis, IR spectroscopy, TGA, powder, and single-crystal X-ray diffraction. Structural analysis shows that each PIA2− in 1 bridges three Cu(II) ions, and likewise each Cu(II) ion connects to three PIA2− ligands, giving a 3-D framework with utp topology and left-/right-handed helical channels. Interestingly, two such identical frameworks interlock with each other to generate a twofold interpenetrated structure that is stabilized by hydrogen bonding and π–π interactions. In addition, the thermal stability and the magnetic properties of 1 have been investigated.
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Keywords: 5-(pyridin-4-yl)isophthalic acid ligand; Cu(II) coordination polymer; crystal structure; magnetic properties

Document Type: Research Article

Affiliations: College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, China

Publication date: January 17, 2016

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