Effects of the Auxiliary Ligands on the Structures of Diphenate Complexes: From 1D Helical Chain to 2D Network |
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| Authors: | Lei Gou Dr Li Li Jian‐Li Li Xiao‐Yong Fan Dong‐Lin Li |
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| Institution: | 1. School of Materials Science and Engineering, Chang′an University, Xi′an 710061, China;2. Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, School of Chemisty and Material Science, Northwest University, Xi′an 710069, China |
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| Abstract: | Two coordination polymers, Cd(dpa)(L1)] ( 1 ) and Cd(dpa)(L2)]·CH3CH2OH3 ( 2 ) (L1 = 2,6‐bis(1H‐benzimidazol‐2yl)‐pyridine, L2 = 2,2′‐(1,4‐butanediyl) bis (1H‐ benzimidazole) (L2), both of which contain helical chain subunits, were synthesized by the reaction of CdII salts and diphenic acid (H2dpa) with rigid, chelating and flexible, bridging auxiliary ligands, respectively. Compound 1 has a 1D helical chain structure, in which dpa2– as bridging ligand is responsible for the formation of the main framework and L1 as chelating ligand grafts on one side of the helical chain. This structure is further extended into a 3D supramolecular framework through two kinds of strong hydrogen bonding interactions. Compound 2 has a 2D structure, in which dpa2– bridges the CdII atoms into helical chains and L2 bridges the left‐ and right‐handed chains into a racemic layer with a 4,4] topology. |
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| Keywords: | Bis(benzimidazole) Diphenic acids Cadmium Hydrothermal synthesis Organic‐inorganic hybrid composites |
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