Synthesis, Structure and Luminescent Properties of a Two-dimensional Network Asymmetric Biscarboxylate Silver(I) Coordination Polymer

A new silver(I) coordination polymer, [Ag(Hcpa)]n (1), was synthesized using a flexible asymmetric biscarboxylate ligand, (4-carboxymethoxy-phenyl)-acetic acid (H2cpa), and Ag(NO3). The acetate group is monodentate and links a Ag(I)-atom. The oxyacatate group is tetradentate and connects three Ag(I)-atoms. Each Hcpa ligand exhibits a novel pentadentate coordination mode bridging four Ag(I) ions and is 4-connected. Each Ag(I) is coordinated by four Hcpa and extend to a novel (4,4)-connected two-dimensional network that contains one-dimensional channels. 1 reveals the blue emission maximum at 446 nm in the solid state at room temperature. The X-ray power diffractions and TGA of 1 are presented.