Aromatic carboxylate effect on dimensionality of three bis(benzimidazole)-based cobalt(II) coordination polymers: Syntheses, structures and properties

Three new metal-organic coordination polymers [Co(4-bbc)(2)(bbbm)] (1), [Co(3,5-pdc)(bbbm)] center dot 2H(2)O (2) and [Co(1,4-ndc)(bbbm)] (3) (4-Hbbc=4-bromobenzoic acid, 3,5-H(2)pdc=3,5-pyridinedicarboxylic acid, 1,4-H(2)ndc=1,4-naphthalenedicarboxylic acid and bbbm=1,1-(1,4-butanediyl)bis-1H-benzimidazole) were hydrothermally synthesized and structurally characterized. Polymer 1 is a 1D chain formed by the bbbm ligands and Co-II ions. Polymer 2 exhibits a 2D network with a (3.4.5)(3(2).4.5.6(2).7(4)) topology. Polymer 3 possesses a 3D three-fold interpenetrating framework. The versatile structures of title polymers indicate that the aromatic carboxylates have an important influence on the dimensionality of 1-3. Moreover, the thermal stability, electrochemical and luminescent properties of 1-3 were investigated. (c) 2013 Elsevier Inc. All rights reserved.