Unique Ag–C bonds, thermal, fluorescence, structural and solution studies of two-dimensional silver(I) coordination polymer

A 2D polymer with unique Ag–C bonds, [Ag(μ4-DPOAc)]n (1) [DPOAc = diphenylacetate], has been synthesized and characterized and its structure was determined by X-ray crystallography. In addition to the coordination to the O atoms of DPOAc the Ag atoms also form strong η1 Ag–C π bonds and exhibit weak Ag–Ag interactions, resulting in the formation of O3CAg⋯AgO3CO3CAg⋯AgO3C moieties. The thermal stabilities of 1 and of its thallium(I) analogue, [Tl(μ3-DPOAc)]n (2), were studied by thermal gravimetric (TG) and differential thermal analyses (DTA). The ligand and compounds 1–2 are luminescent in the solution state, with emission maxima at 370, 383 and 360 nm, respectively. The results of studies of the stoichiometry and formation of complexes of 1 and 2 in DMF solution were found to be in support of their solid state stoichiometry.