Anion-directed assembly of two novel cadmium(II) complexes containing 2,2’-(1,4-propylene)bis(1H-benzimidazole) ligand

Abstract

Two novel inorganic-organic hybrids, {[Cd(C₃BIm)(Bdc)] ∙ H₂O_}n (I) and {[Cd(C₃BIm)(Btc)] ∙ 4H₂O}_n (II) {H₂C₃BIm = 2,2′-(1,3-propylene)bis(1H-benzimidazole), H₂Bdc = benzene-1,3-dicarboxylic acid, and H₃Btc = benzene-1,3,5-tricarboxylic acid}, have been prepared under specific reaction temperature and ratio of reactants. Their characterization included IR, TGA, and single-crystal X-ray diffraction analysis (CIF files CCDC. nos. 801661 (I), 801662 (II)). Both complexes I and II exhibit two-dimensional puckered hexagonal (6,3) sheets structurally, whose 3-connecting nodes are provided by H₂C₃BIm, H₂Bdc, Cd²⁺ (I) and H₂C₃BIm, H₂Btc, Cd²⁺ (^II), respectively. Furthermore, both compounds show intense luminescence at room temperature.