| Abstract: Two zinc coordination polymers: [Zn(obix)(CAM)]n(1) and [Zn(bimb)(CAM)]n(2) (H2CAM=camphor acid, obix=1,2-bis(imidazol-1-ylmethyl)benzene and bimb=4,4′-bis(imidazol-1-ylmethyl)biphenyl) have been synthesized under hydrothermal conditions and characterized by elemental analysis, IR spectroscopy, TGA and single-crystal X-ray diffraction. The crystal structures show that complex 1 crystallizes in triclinic, space group P1 with a=0.973 4(3) nm, b=1.113 18(12) nm, c=1.210 3(2) nm, α=101.548(3)°, β=101.257(2)°, γ=103.373(2)°, V=1.209 3(4) nm3, Z=2, Dc=1.378 g·cm-3, F(000)=524, μ=1.052 cm-1, the final R1=0.051 3, wR2=0.108 3. While complex 2 crystallizes in monoclinic, space group P21/c with a=1.111 1(4) nm, b=1.409 6(6) nm, c=1.770 0(7) nm, β=92.366(5)°, V=2.769 8(19) nm3, Z=4, Dc=1.386 g·cm-3, F(000)=1 208, μ=0.929 cm-1, the final R1=0.058 2, wR2=0.116 7. The bis(imidazole) ligands with different spacer lengths exhibit conformational flexibility and lead to the generation of diversified architectures. Complex 1 consists of 24-membered {Zn2(obix)2} rings that are further bridged by CAM anions into a one-dimensional tubular structure. Complex 2 shows a two-dimensional (2D) lattice network with (4,4) topology. Moreover, their luminescent properties have been investigated in the solid state. CCDC: 796695, 1; 796696, 2. |
