Supramolecular networks through second-sphere coordination based on 1D metal-4,4′-dipyridyldisulfide coordination polymers and hydrogenfumarate or sulfonate anions

Four hydrogen-bonded assemblies of formula [M(dpds)(2)(OH2)(2)]A(2)center dot nH(2)O (A = anion) are described. These assemblies result from the second-sphere coordination interactions between the 1D coordination polymers [M(dpds)(2)(OH2)(2)](2+), M = Zn(II) and Cu(II). dpds = 4,4'-dipyridyldisulfide, and the pyridine-3-sulfonate (3pySO(3)(-)) or hydrogenfumarate (Hfum(-)) anions. Significantly, supramolecular structural variations are observed depending on the presence of water lattice molecules, which formed discrete aggregates when the Hfum(-) anion was used. The effects of geometrical variations in the building blocks are also evident on using Jahn-Teller-distorted divalent Cu(II) ions or regular octahedral species based on Zn(II) ions. The second-sphere effects on the stabilization of the compounds are illustrated by TGA experiments. (C) 2011 Elsevier Ltd. All rights reserved.