Structural Influence of the Ligand Geometry on Construction of Coordination Polymers Formed from Silver(I) Chloride Ribbons and Bipodal Nitrogen Donor Ligands

摘要

An assembly of adducts of silver nitrate and KC1 and bipodal nitrogen donor ligands, 4,4'-bipyridine (bpy), trans-1,2-bis(4-pyridyl)ethylene (tbpe) or 1,2-bis(4-pyri-dyl)ethane (bpe), at room temperature affords new supra-molecular coordination polymers (SCP), [AgClbpy] (1), [(AgCl)_2·tbpe] (2) and [(AgCl)_3(bpe)_2] (3). X-ray single crystal analyses reveal that 1-3 have 3D-supramolecular networks composed of different types of infinite ID-ribbons of ladder, 1, and staircase, 2 and 3, structures formed from fused minicyle {Ag_2(μ_3-Cl)_2} motifs, which are bridged by the nitrogen donor ligands to form 2D-layers. The 2D-layers are interconnected by extensive hydrogen bonds and π-π stacking thereby creating 3D-networks. The products are also characterized by IR and electronic absorption spectra. SCP 1-3 display strong fluorescence in the solid state at room temperature.