Design and construction of diverse structures of coordination polymers: Photocatalytic properties

Abstract

The reaction of Cu(NO3)2·3H2O/Ni(NO3)2·6H2O with 4′-(4-(3,5-dicarboxylphenoxy)phenyl)-4,2′:6′,4′′-terpyridine (H2dbp) gave [Cu0.5(Hdbp)]n (1) and [Ni(dbp)(H2O)]n (2), while the reactions of Co(NO3)2·6H2O with H2dbp in the presence of 4,4′-bipy and 2,2′-bpy generated [Co(dbp)(4,4′-bipy)]n (3) and {[Co(dbp)(2,2′-bipy)]n·H2O} (4), respectively (4,4′-bipy=4.4′-pyridine and 2,2′-bipy=2,2′-bipyridine). X-Ray single-crystal analyses reveal that 1 contains a 1D double chain. 2 possesses a 3D architecture with (4.620.83)2 topology that is interpenetrated with each other to form a 2-fold network. In 3, the 2D [Co(dbp)]n sheets are pillared by 4,4′-bpy to form a 3D framework with 1D open channel. Compound 4 consists of a 1D ladder-like chain. The results showed that the structural diversity of the coordination polymers resulted from the different geometries of metal ions and effect of assistant ligands. Furthermore, the photocatalytic properties of 1–4 for degradation of the methyl violet (MV) have been examined.