Structure and electrical properties of a one-dimensional polymeric silver thiosaccharinate complex with argentophilic interactions

Abstract

Among the potential applications of coordination polymers, electrical con­ductivity ranks high in technological inter­est. We report the synthesis, crystal structure and spectroscopic analysis of an AgI–thio­saccharinate one-dimensional coordination polymer {systematic name: catena-poly[[[aqua­tetra­kis­(μ3-1,1-dioxo-1,2-benziso­thia­zole-3-thiol­ato-κ3N:S3:S3)tetra­silver(I)]-μ2-4,4′-(propane-1,3-di­yl)di­pyridine-κ2N:N′] dimethyl sulfoxide hemisolvate]}, {[Ag4(C7H4NO2S2)4(C13H14N2)(H2O)]·0.5C2H6OS}n, with the 4,4′-(propane-1,3-di­yl)di­pyridine ligand acting as a spacer. A relevant feature of the structure is the presence of an unusually short Ag...Ag distance of 2.8306 (9) Å, well within the range of argentophilic inter­actions, confirmed experimentally as such by a Raman study on the low-frequency spectrum, and corroborated theoretically by an Atoms in Mol­ecules (AIM) analysis of the calculated electron density. Electrical conductivity measurements show that this complex can act as a semiconductor with moderate conductivity.