Four Cu(II)/Co(II) coordination polymers based on N,N′-di(3-pyridyl)sebacicdiamide: influence of different carboxylate ancillary ligands on structures and properties.

Four Cu(II)/Co(II) coordination polymers, [Cu(L)(BDC)(H2O)]·3H2O (1), [Cu(L)(DNBA)2] (2), [Co(L)2(DNBA)2] (3), and [Co(L)(NIPH)(H2O)]·H2O (4) (H2BDC = 1,4-benzenedicarboxylic acid, HDNBA = 3,5-dinitrobenzoic acid, H2NIPH = 5-nitroisophthalic acid, L = N,N′-di(3-pyridyl)sebacicdiamide), have been synthesized under hydrothermal conditions. The structures of1–4have been determined by single-crystal X-ray diffraction analyses and1–4were further characterized by infrared spectroscopy and thermogravimetric analyses. Complex1is a 2-D polymeric layer with a 4-connectedsqltopology. Complex2displays a 1-D zigzag chain. Complex3possesses a 1-D double-chain structure. Complex4exhibits a ribbon chain based on the 1-D [Co–L]nmeso-helical chain. Adjacent layers for1and adjacent chains for2–4are further linked by hydrogen bonding orπ–πstacking interactions to form 3-D supramolecular networks. The differences of carboxylates and metal ions show significant effect on the ultimate architectures of the four complexes. Thermal stabilities, fluorescent properties and photocatalytic activities of1–4were also studied. [ABSTRACT FROM PUBLISHER]