Two-dimensional and three-dimensional nickel(II) supramolecular complexes based on the new chelating ligand N-(4-carboxyphenyl)iminodiacetic acid:: hydrothermal synthesis and crystal structures

Two new nickel (II) supramolecular complexes, [Ni(HCPIDA)(H2O)(3)] (1) and [Ni-2(HCPIDA)(2)(bpy)(H2O)(4)].(H2O)(2) (2) (H(3)CPIDA = N-(4-carboxyphenyl) iminodiacetic acid, bpy = 4,4'-bipyridine) were synthesized through hydrothermal method. These supramolecular complexes have been structurally characterized by X-ray single crystal diffraction. The structure of 1 exhibits a new three-dimensional supramolecular framework with one-dimensional channels, formed by hydrogen bonding interactions. The structure of 2 shows a new two-dimensional joint-ladder like architecture constructed by hydrogen bonding and pi-pi staking interactions. The compounds 1 and 2 contain the zigzag-shape and ladder-shape supramolecular chains, respectively, which further extend into the three-dimensional and two-dimensional supramolecular network, respectively. (C) 2004 Elsevier B.V. All rights reserved.