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, three different dimensional MOFs are obtained.•1 is a 5-fold interpenetrated 3D framework with PtS topology containing only 4,4′-oba.•2 is a 2D network containing 1D [CuI2(μ2-OH)(μ3-Cl)]n chains and only 4-bpah.•3 is a 1D infinite chain based on both the 4-bpah and 4,4′-oba ligands.•The fluorescent, electrochemical and photocatalytic properties of 3 were reported.

By adjusting molar ratio of the reactants (metal salt and two types of ligands), three new CuII/I metal–organic frameworks, [CuII2(4,4′-oba)2(H2O)2]·H2O (1) and [CuI2(4-bpah)2(μ2-OH)(μ3-Cl)]·∼H2O (2) and [CuII(4-bpah)2(4,4′-oba)(H2O)] (3) (4,4′-H2oba = 4,4′-oxydibenzoic acid and 4-bpah = N,N′-bis(4-pyridinecarboxamide)-1,2-cyclohexane), have been prepared and structurally characterized by single-crystal X-ray diffraction analyses. When Cu:4-bpah:4,4′-H2oba 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′-H2oba ratio of 4:2:1, which contains 1D [CuI2(μ2-OH)(μ3-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′-H2oba 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.

Graphical abstractBy adjusting molar ratio of the reactants, three new CuII/I metal–organic frameworks have been hydrothermally synthesized. Complexes 1–3 exhibit a 5-fold interpenetrating 3D framework, a 2D network and a 1D infinite chain, respectively. The fluorescent, electrochemical, and photocatalytic properties of 3 were investigated.Figure optionsDownload full-size imageDownload as PowerPoint slide