Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1407996 | Journal of Molecular Structure | 2015 | 6 Pages |
•Three metal–organic CoII coordination polymer were characterized.•The influences of substituent on framework were discussed.•TG analysis confirms the stability of the polymers.•Luminescent and catalytic properties were investigated.
Three Co(II) coordination polymers based on flexible bis(2-dimethylbenzimidazole) and the derivatives of the familiar isophthalate co-ligands, namely [Co(L)(ip)]n (1), [Co2(L)2(nip)2]n (2) and [Co2(L)2(tbip)2·2H2O]n (3) (L = 1,2-bis(2-methylbenzimidazol-1-ylmethyl)benzene, H2ip = isophthalic acid, H2nip = 5-nitroisophthalic acid, H2tbip = 5-tert-butylisophthalic acid) have been synthesized by hydrothermal methods and characterized by elemental analyses, IR spectra, thermogravimetric analyses and single-crystal X-ray diffraction. Both complexes 1 and 2 exhibit a 2-fold interpenetrating 3D network with 66-dia topology, whereas complex 3 is bridged by the L and tbip2− ligands to form a rarely tri-nodal (3,3,5) layer with 3,3,5L18 topology. The results indicate that Co(II) mixed coordination polymers structurally modulated by the substituent effect of isophthalate-involved co-ligands. In addition, the fluorescence and catalytic activity of the complexes for the degradation of methyl orange by the sodium persulfate in a Fenton-like process have been investigated.
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