Synthesis, structural characterization, and photocatalytic study of transition metal coordination polymers constructed from mixed ligands

Three 3-D coordination polymers, [Cu(cca)(4,4'-bipy)](n) (1), [Co-3(pda)(3)(1,10'-phen)(2)](n) (2), and [Co(pda)(1,10'-phen)](n) (3), have been synthesized from 4-carboxycinnamic acid (cca), 1,4'-phenylenediacrylic acid (pda), 4,4'-bipyridine (4,4'-bipy), 1,10'-phenanthroline (1,10'-phen), and Cu and Co salts under different conditions. The X-ray crystal structures of these three complexes are presented. Complex 1 exhibits a threefold 3-D alpha-Po interpenetration network. Complex 2 with a 3-D framework with six-connected single alpha-Po framework constructed from Co-3 unit has been synthesized and characterized. Complex 3 shows a 3-D framework with bcu topology composed of 1-D rod-shaped secondary building units. Furthermore, the photocatalytic properties of 2 were studied. When excited by UV light, 2 exhibits photocatalytic activity, in 300 min, about 71% Rhodamine B decomposes.