Photoluminescent coordination polymers of d10 metals with 4,4′-dipyridylsulfide (dps)

Reactions of AgClO4, Zn(CH3COO)2 · H2O and CuI with the ligand 4,4′-dipyridylsulfide (dps) in 1:1 ratio give rise to coordination polymers 1–3 and 5, the structures of which were characterized by X-ray crystallography. Polymers [Ag2(dps)2](ClO4)2 · MeCN (1) and [Ag2(dps)2(μ2-MeCN)(MeCN)](ClO4)2 · MeCN · H2O (2) are pseudo-supramolecular isomers, differing from each other in the coordination geometry of silver atom and the packing pattern. Both 1 and 2 are zigzag coordination polymers bridged by weak Ag⋯Ag, Ag⋯S or Ag⋯Ntriple bond; length of mdashC–CH3 interactions to form double stranded coordination polymers. While [Zn(dps)(CH3COO)2] (3) is a zigzag single stranded coordination polymer, [Zn(dps)2(H2O)2](ClO4)2 · H2O (4) is an unusual mononuclear complex with a box-like structure. Interesting intermolecular hydrogen bonding present in the compounds 3 and 4 leads to 3D hydrogen-bonded network structure.Coordination polymer [Cu2I2(dps)2] (5) is a non-interpenetrating (4,4) net. Photoluminescence properties of the compounds 1–5 have been examined in solid states at room temperature. These compounds have been found to exhibit yellow and blue photoluminescence.