Synthesis, Crystal Structure and Luminescent Property of a Ag(I) Coordination Polymer with a 3D Sandwich-like Framework

A new coordination polymer, {[Ag-2(bpp)(2)(H2O)(2)]center dot bpdc center dot 3H(2)O}(n), derived from the ligand biphenyl-4,4'-dicarboxylic acid (H(2)bpdc), has been obtained through a hydrothermal technique (bpp = 1,3-bis(4-pyridyl)propane). Its single-crystal structure has been characterized by single-crystal X-ray diffraction, powder XRD, FT-IR, TGA and elemental analysis techniques. The single-crystal X-ray diffraction reveals that complex 1 consists of 1D infinite [Ag(bpp)(H2O)](n)(n+) cationic chains, 2D anionic layer constructed by bpdc anions and free water which provide charge compensation in the crystal structure. The 1D infinite [Ag(bpp)(H2O)](n)(n+) cationic chains and 2D anionic layer are further stacked in -ABAB- fashion through intermolecular H-bonding to form a 3D sandwich-like framework. In addition, the luminescent property of complex 1 in the solid state at room temperature was investigated.