Ligand geometry-directed assembly of seven entangled coordination polymers

Seven new complexes [Cd(oba)(2,2'- bipy)](2) (1), [Co(oba)(bbm)]center dot 1.5H(2)O (2), [Mn-3(oba)(3)(bbm)(H2O)(2)]center dot DMF 2H(2)O (3), [Mn2(bibm)(2)(oba)(2)] (4), [Co(oba)(bibm)](2) H2O (5), [Co-5(bpb)(3)(oba)(4)(Hoba)(2)(H2O)(2)] (6) and[Ni-2(bpb)(2)(oba)(2)(DMF)(H2O)](2)center dot 5H(2)O (7) (H(2)oba = 4,4'-oxydibenzoic acid, bbm = 1,4-di(1H- imidazol-1-yl) benzene, bibm =4,4'-di(1H-imidazol-1-yl)-1,1'-biphenyl, bpb = 1,4- di(pyridin-4-yl)benzene, 2,2'-bipy = 2,2'-bipyridine) have been synthesized and characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis, X-ray powder diffraction and X-ray single crystal diffraction. Compound 1 displays a 3-fold polythreaded 2D network, while 2 has sql layers and these layers are further stacked in a 2D. 3D polycatenation model. Compound 3 shows a 3D porous net with {421 54 63} topology with 1D channels that are filled by DMF and water molecules while 4 possesses a 2D (4,4) layer structure composed of [Mn2( bibm) 2( oba) 2] units. Compound 5 exhibits a five-fold interpenetrating 3D framework while 6 displays a 2D. 3D polycatenation motif. Compound 7 has a three-fold interpenetrating 3D framework. These results provide some insight into the ligand geometry-driven assembly of entangled coordination polymers. Thermal stability and photoluminescence properties of 1-7 were studied. The optical and photocatalytic properties of 3 and 6 were also investigated.