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

Abstract

Three 3-D coordination polymers, [Cu(cca)(4,4′-bipy)]n (1), [Co3(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 α-Po interpenetration network. Complex 2 with a 3-D framework with six-connected single α-Po framework constructed from Co3 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.