No abstract

Two Co(II) coordination polymers, [Co(ca)(bib)] n (I) and {[Co(ca)(bibp) 1.5 ]Á 1.5H 2 O} n (II) (H 2 ca = citraconic acid, bib = 1,4-bis(1-imidazoly)benzene, bibp = 1,4-bis-[4-(imidazol-1-yl)benzyl]piperazine), were prepared by hydrothermal method and measured structurally by single-crystal X-ray diffraction, infrared spectroscopy, and elemental analysis. Complex I shows a 2D layer structure containing Cocarboxylate chains. Complex II displays a 3D metal-organic framework composed of the binuclear [Co 2 (CO 2 ) 2 ] 2+ cluster nodes through ca 2− and bibp as linkers with (4 12 Á6 3 ) topology. Complexes I and II have high thermal stabilities because their frameworks maintain good integrity before 340 C and 265 C, respectively. Both complexes show well photocatalytic activities for methylene blue degradation under UV irradiation in the presence of H 2 O 2 , which may be used as potential materials for photocatalytic dyes degradation. K E Y W O R D Scitraconic acid, coordination polymer, photocatalytic degradation, thermal stability