Two novel interpenetrating MOFs constructed from a derivative of phenanthroline and a V-shaped flexible dicarboxylate ligand contains unique chiral structure

Based on 1H-imidazo[4,5-f][1,10]-phenanthroline (IP), 4,4'-oxybis(benzoic acid) (H(2)oba), and two different metal salts, two novel complexes were hydrothermally constructed, {[Cd-2(oba)(2)(IP)(2)(H2O)]center dot H2O}(n) (1) and {[Mn-2(IP)(4)(oba)(2)]center dot(oba)(H2O)(2)}(n) (2). Complex 1 exhibits a rare 2D -> 2D parallel interpenetration layer, which contains two same-hand chiral sheets with the P (1) over bar space group. Complex 2 contains 1D left-hand helical chain with the C2 space group. Meanwhile, the dissociate oba and water molecules are connected to be a right-hand helical chain via hydrogen bonds, and form a twofold-interpenetrating structure. In addition, the two compounds also exhibit good thermal stability. (C) 2011 Elsevier B. V. All rights reserved.