Synthesis and Crystal Structure of Two Interpenetrated Open Frameworks with Different Structural Motifs

Two three-dimensional interpenetrating coordination polymers, [Co(C8H4O4)(C12H10N2)]n, 1, and [Zn3(C14H8O4)3 (C12H10N2)2]n, 2, have been prepared hydrothermally by the assembly of cobalt(II), 1,2-bis(4-pyridyl)ethene (C12H10N2) with terephthalic acid (C8H4O4), and zinc(II), 1,2-bis(4-pyridyl)ethene with biphenyl-4,4'-dicarboxylic acid (C14H8O4), respectively. Single-crystal X-ray diffraction analyses reveal that 1 and 2 have similar 2-fold interpenetration. Because of the influence of metal ions, the O,O'-donor ligands adopt similar coordination modes but form different kinds of individual motifs, which finally aggregate to generate different supramolecular architectures. The structures of the two three-dimensional interpenetrating open frameworks have been characterized and studied.