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One-dimensional copper(II) coordination polymers based on 1,3-bis(pyridin-4-yl)propane and diimine ligands
Satish Shantaram Bhat1, Naveen Shivalingegowda2, Vidyanand Krishna Revankar1
1Department of Chemistry, Karnatak University, Pavatenagar, Dharwad, Karnataka 580 003, India.
Abstract:
Two one-dimensional (1D) coordination polymers (CPs), namely catena-poly[[[aqua(2,2'-bipyridine-κ2N,N')(nitrato-κO)copper(II)]-μ-1,3-bis(pyridin-4-yl)propane-κ2N:N'] nitrate], {[Cu(NO3)(C10H8N2)(C13H14N2)(H2O)]·NO3}n (1), and catena-poly[[[aqua(nitrato-κO)(1,10-phenanthroline-κ2N,N')copper(II)]-μ-1,3-bis(pyridin-4-yl)propane-κ2N:N'] nitrate], {[Cu(NO3)(C12H8N2)(C13H14N2)(H2O)]·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.
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