Synthesis, structure and photoluminescence of a COO coordination polymer:: [Cd(Pyphen)(1,4-BDC)(H2O)]•0.5Pyphen

The title complex, [Cd(Pyphen)(1,4-BDC)(H2O)]center dot 0.5Pyphen (1) (Pyphen=pyrazino[2,3-f][1,10]phenanthroline and 1,4-H2BDC =1,4-benzenedicarboxylic acid) has been obtained by using hydrothermal synthesis and characterized by elemental analysis, IR, fluorescence spectrum and single-crystal X-ray diffraction. It crystallizes in orthorhombic, space group Pbcn with a=2.489 2(5) nm, b=0.967 88(19) nm, c=2.057 0(4) nm, V=4.955 9(17) nm(3), Z=8, CdC29H18N6O4, M-r=642.89, D-c=1.723 g center dot cm(-3), F(000)=2 576, mu(Mo K alpha)=0.937 mm(-1), R=0.039 6 and wR=0.102 6. The compound I exhibits one-dimensional chain structures, which are further stacked through pi-pi interactions to form supramolecular layers. Solid-state luminescent spectrum of the complex 1 indicates intense fluorescent emission. CCDC: 679004.