Controllable assembly of three copper(II/I) metal-organic frameworks based on N,N′-bis(4-pyridinecarboxamide)-1,2-cyclohexane and 4,4′-oxydibenzoic acid: From three-dimensional interpenetrating framework to one-dimensional infinite chain

By adjusting molar ratio of the reactants (metal salt and two types of ligands), three new Cu-II/I metalorganic frameworks, [Cu-2(II)(4,4'-oba)(2)(H2O)(2)]center dot H2O (1) and [Cu-2(I)(4-bpah)(2)(mu(2)-OH)(mu(3)-Cl)]center dot similar to H2O (2) and [Cu-II(4-bpah)(2)(4,4'-oba)(H2O)] (3) (4,4'-H(2)oba = 4,4'-oxydibenzoic acid and 4-bpah = N,N'-bis(4-pyridinecarboxamide)-1,2-cyclohexane), have been prepared and structurally characterized by single-crystal Xray diffraction analyses. When Cu:4-bpah:4,4'-H(2)oba ratio is 4:1:2, complex 1 is a 5-fold interpenetrated three-dimensional (3D) framework with 4-connected PtS topology, which contains 4,4'-oba ligand. Complex 2 exhibits a 2D network with Cu:4-bpah:4,4'-H(2)oba ratio of 4:2:1, which contains 1D [Cu-2(I)(mu(2)-OH)(mu(3)-Cl)](n) chains and 4-bpah ligand. Complex 3 is a 1D infinite chain based on 4-bpah and 4,4'-oba mixed ligands with Cu:4-bpah:4,4'-H(2)oba ratio of 4:2:3. The results reveal that 1-3 are particularly sensitive to the molar ratio of the reactant metal salts and organic ligands in this system. The fluorescent, electrochemical, and photocatalytic properties of 3 were investigated. (C) 2014 Elsevier B.V. All rights reserved.