The nature of the metal ions influenced formation of coordination polymers based on asymmetric semi-rigid 3-(4-carboxyphenoxy)phthalic acid with N-heterocyclic ligands

Three new coordination complexes, namely [Cd(HL)(mu-bpp)(H2O)](n)center dot(H2O)(n) (1), [Co(HL)(mu-bpp)](n)center dot(H2O)(n) (2), and [Ag-2(L)(2/3)(mu-bpp)](n) (3) [H3L = 3-(4-carboxyphenoxy)phthalic acid and bpp = 1,3-bis(4-pyridyl)propane], have been successfully synthesized by using H3L and accessory bridging ligand. The predominant influence in 1-3 may be the nature of different metal ions, which result in the complexes assembling into supramolecular frameworks with different topological nets. Structural analysis reveals that the structure of 1 can be described as a 2D network with Point (Schalfli) symbol for net: {6(6)} topology. Complex 2 shows the similar 2D 4(4) grid-like layers by the intermolecular hydrogen bonds, whereas dinuclear Ag(I) clusters in 3 act as coordination nodes, forming a sandwich-like 2D structure. In addition, the magnetic behavior of 2 was also studied. (C) 2013 Elsevier B.V. All rights reserved.