A series of coordination polymers assembled from 9,9-dimethylfluorene-2,7-dicarboxylic acid and various flexible bis(imidazole) ligands: synthesis, structures and properties

Seven new coordination polymers, namely, [Co-2(mfda)(2)(bip)(H2O)(2)]center dot 2H(2)O (1), [Zn-2(mfda)(2)(bip)]center dot H2O (2), [Co-2(mfda)(2)(bib)(H2O)] (3), [Zn-2(mfda)(2)(bib)(2)]center dot(DMF)(3)center dot H2O (4), [Zn-2(mfda)(2)(bib)] (5), [Zn-2(mfda)(2)(bite)] (6) and [Ni-4(mfda)(4)(bite)(3)(mu(2)-H2O)(2)]center dot 4H(2)O (7) (H(2)mfda = 9,9-dimethylfluorene-2,7-dicarboxylic acid, bip = 1,3-bis(imidazole) propane, bib = 1,4-bis(imidazole) butane and bite = 1,4-bis(imidazole) butene), have been synthesized and structurally characterized. Compounds 1 and 3 feature a two-fold interpenetrating framework of pcu topology. Compound 2 exhibits a three-fold interpenetrating framework of pcu topology. Compound 4 displays a four-fold interpenetrating framework of dia topology. Compounds 5 and 6 exhibit a uninodal six-connected network with unusual acs topology. Compound 7 shows a uninodal eight-connected framework with CsCl topology. The luminescence properties of compounds 2, 4, 5 and 6 were also measured.