Synthesis,Structure and Thermal Stability of a New Lead Coordination Polymer:[Pb(L1)(L2)]·1.25H2O

A new Pb(Ⅱ) coordination polymer [Pb(L1)(L2)]·1.25H2O has been synthesized with 2-(4-fluorophenyl)-1H-imidazo[4,5-f][1,10]phenanthroline (L1) and sebacic acid (H2L2) under hydrothermal conditions. Crystallographic data: triclinic, space group Pī with a=8.4890(17), b=12.471(3), c=14.604(3), α=67.04(3), β=74.08(3), γ=85.80(3)°, V=1368.0(5)3 , Z=1, C58H59F2N8O10.5Pb2 , Mr=1488.51, Dc=1.807g/cm3 , F(000)=729, μ(MoKa)=6.221mm-1 , R=0.0283 and wR=0.0564. The L2 dianions bridge neighboring Pb(Ⅱ) atoms to form a two-dimensional layer structure. The π-π interactions between the L1 ligands of neighboring layers led to a three-dimensional supramolecular architecture. The IR and TGA of the complex have been studied in detail.