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Z. Naturforsch. 2012,
67b, 799 – 805
doi:10.5560/ZNB.2012-0104
Syntheses, Structures and Characterization of Two Ni(II) and Pb(II) Coordination Polymers Constructed by 2-(4-Fluorophenyl)-1H-imidazo[4,5-f][1,10]phenanthroline and Flexible 4,4'-Oxybis(benzoate) Ligands
College of Chemistry and Chemical Engineering, Changchun University of Technology, Changchun 130012, People's Republic of China
Reprint requests to Prof. Qian Qiao. E-mail:
qiaoqianccut@yahoo.com.cn
Received April 17, 2012 / published online August 20, 2012
Two coordination polymers, [Ni(H2O)(L)(OBA)] (1) and [Pb(L)2(OBA)]·3H2O (2) [L = 2-(4-fluorophenyl)-1H-imidazo[4,5-f][1,10]phenanthroline and OBA = 4,4'-oxybis(benzoate)], have been synthesized under hydrothermal conditions, and characterized by elemental analysis, and IR and UV/Vis spectra. Crystal data for 1: C33H21FN4NiO6, triclinic, space group P1̅, a = 13.8490(10), b = 14.932(2), c = 14.993(3) Å, α = 107.534(4), β = 94.670(4), γ = 103.836(5)○, V = 2830.9(7) Å3, Z = 4. Crystal data for 2: C52H36F2N8O8Pb, orthorhombic, space group Pna21, a = 16.256(4), b = 16.085(5), c = 17.810(3) Å, V = 4657 (2) Å3, Z = 4. In 1, OBA dianions bridge Ni(II) atoms to form two crystallographically distinct chains. These chains are further extended into a 2D supramolecular architecure through π-π interactions. In 2, each OBA dianion links
neighboring Pb(II) atoms to yield a helical chain. Further, π-π interactions among adjacent chains give rise to a 3D supramolecular architecture.
Key words: Crystal Structure, Coordination Polymer, 2-(4-Fluorophenyl)-1H-imidazo[4,5-f][1,10]phenanthroline, 4,4'-Oxybis(benzoate)