Synthesis, Crystal Structure, Thermal Stability and Fluorescence Properties of [Co_2(C_(13)H_(10)NO_2)_4(4,4′-bipy)_2]_n

Using N-phenylanthranilic acid (NPA), CoSO4 and 4,4′-bipyridine as starting material, one new coordination polymer [Co2(C13H10NO2)4(4,4′-bipy)2]n has been synthesized by solution method and characterized by IR, elemental analysis, TGA, luminescence and X-ray diffraction methods. The crystallography reveals that complex crystallizes in the triclinic space group P1, with a=1.086 99(13) nm, b=1.136 23(13) nm, c=1.414 72(16) nm, α=71.886 0(10)°, β=76.374(2)°, γ=66.177 0(10)°, V=1.507 0(3) nm3, Dc=1.409 g·cm-3, Z=2, F(000)=662. Final GOF=1.028, R1=0.043 7, wR2=0.079 4. The centric Co(Ⅱ) ion is coordinated with two N atoms from two 4,4′-bipyridine molecules, and four O atoms from three N-phenylanthranilic acid molecules forming a distorted octahedral coordination geometry. One of the N-phenylanthranilic acid chelates the Co(Ⅱ) ion, while the other two N-phenylanthranilic acid molecules connect another Co(Ⅱ) ion with monodentate motif to form a binuclear cluster SBUs (second building units). The SBUs are further linked by 4,4′-bipyridine ligand forming an one-dimensional double-chain ladder-like structure. CCDC: 750883.