One-dimensional copper(II) coordination polymers based on 1,3-bis(pyridin-4-yl)propane and diimine ligands

Two one-dimensional (1D) coordination polymers (CPs), namely catena-poly[[[aqua(2,2'-bipyridine-kappa N-2,N')(nitrato-kappa O) copper(II)]-mu-1,3-bis(pyridin-4-yl) propane-kappa N-2:N'] nitrate], {[Cu(NO3)(C10H8N2)(C13H14N2)(H2O)]center dot NO3}(n) (1), and catena-poly[[[aqua(nitrato-kappa O)(1,10-phenanthroline-kappa N-2,N') copper(II)]-mu-1,3-bis(pyridin-4-yl) propane-kappa N-2:N'] nitrate], {[Cu(NO3)(C12H8N2)(C13H14N2)(H2O)]center dot NO3}(n) (2), have been synthesized using [Cu(NO3)(NN)(H2O)(2)] NO3, where NN = 2,2'-bipyridine (bpy) or 1,10-phenanthroline (phen), as a linker in a 1: 1 molar ratio. The CPs were characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis and single-crystal X-ray structure determination. The 1,3-bis(pyridin-4-yl) propane (dpp) ligand acts as a bridging ligand, leading to the formation of a 1D polymer. The octahedral coordination sphere around copper consists of two N atoms from bpy for 1 or phen for 2, two N atoms from dpp, one O atom from water and one O atom from a coordinated nitrate anion. Each structure contains two crystallographically independent chains in the asymmetric unit and the chains are linked via hydrogen bonds into a three-dimensional network.