Synthesis and crystal structures of three novel coordination polymers constructed from Ag(I) thiocyanate and nitrogen donor ligands

Three supramolecular coordination polymers (SCPs) [(AgSCN)2L] {L = 4,4′-bipyridine (bpy) (1), trans-1,2-bis(4-pyridyl)ethylene (tbpe) (2) and phenazine (phenz) (3)} have been synthesized and structurally characterized by single-crystal X-ray diffraction. Synthesis was affected in H2O/acetonitrile/NH3 media at room temperature. The bpy, tbpe and phenz bipodal ligands adopt different conformations which would affect the skeleton of the (AgSCN)n building blocks that allow the interconnection of the (AgSCN)n fragments and propagation of the network structure in three dimensions. Supramolecular interactions such as hydrogen-bonding, argentophilic interaction and π–π stacking play an important role in the assembly of these coordination polymers.

Graphical abstractThree novel supramolecular coordination polymers of AgSCN with nitrogen donor ligands; [AgSCN)2 · (4,4′-bipyridine)], [AgSCN)2 · (trans-1,2-bis(4-pyridyl)ethene)], [AgSCN)2 · (phenazine)], have been synthesized and structurally characterized by X-ray single-crystal analysis. The length and flexibility of the bipodal ligand affect greatly the structure of the (AgSCN)n building blocks.Figure optionsDownload full-size imageDownload as PowerPoint slide