| Abstract: A new 2D Zn(Ⅱ) coordination polymer [Zn(HIDC)(bib)0.5]n(1) was obtained by the hydrothermal reaction of ZnCl2, imidazole-4,5-dicarboxylic acid (H3IDC), and 1,4-bis(imidazol-1-yl)-butane (bib) with 2∶2∶1 mole ratio. X-ray diffraction crystal structural analysis reveals its crystallizes in monoclinic, space group P21/n with a=0.943 38(16), b=1.022 48(18), c=1.393 8(2) nm, β=109.434(3)°, V=1.267 9(4) nm3，Z=4, Dc=1.648 Mg·m-3, F(000)=636, the final R1=0.044 1, and wR2=0.100 3 for 1 742 observed reflections with I≥2σ(I). In 1, each Zn(Ⅱ) ion is five-coordinated with a distorted trigonal bipyramidal coordination geometry, and each μ2-HIDC2 acts as a bridge to bond two neighboring Zn(Ⅱ) ions, leading to an 1D zigzag chain architecture. The adjacent chains are further linked by bib to form an infinite 2D network structure. The fluorescence spectrum of 1 exhibits intense emission at 436 nm when excited at 380 nm in solid state at room temperature. CCDC: 748259. |
