| Abstract: Three Cd coordination polymers with 2,3-pyrazinedicarboxylic acid (pzdc) and N-donor ligand, {[Cd(pzdc)(2,2′-bpy)]·H2O}n (1), {[Cd(pzdc)(2,2′-bpy)]·2H2O}n (2) and {[Cd(pzdc) (H2O)2]·2H2O}n (3), have been synthesized and characterized. Complex 1 crystallizes in monoclinic, space group P21/c with a=1.082 47(8) nm, b=1.443 01(9) nm, c=1.025 87(7) nm, β=98.433(3)°, V=1.585 10(19) nm3; complex 2 belongs to monoclinic, space group P21/n with a＝1.171 9(5) nm, b=1.191 8(4) nm, c=1.359 5(6) nm, β=110.474(17)°, V=1.778 9(13) nm3; complex 3 crystallizes in monoclinic, space group P21/c with a=0.669 54(3) nm, b=0.773 24(3) nm, c=2.070 60(12) nm, β=93.050 4(16)°, V=1.070 46(9) nm3. The X-ray diffraction structure analysis indicates that the pzdc ligand in these complexes is coordinated to three Cd atoms through its four donors, forming a (4,82) net 2D network structure in 1 and 2, while obtaining a 1D chain and hydrogen bonding 3D structure in 3. Complexes 1 and 3 both exhibit photoluminescent emissions at 415 nm (λex=313 nm). CCDC: 673389, 1; 673390, 2; 673391, 3. |
