Novel silver(I) compounds assembled from hybrid ligands based on linear or T-shaped coordination environment

Two novel ID compounds {[Ag-3(Hbptc)(bpa)(2)]center dot H2O}(n) (1) and [Ag-2(H(2)bptc)(bpp)(2)](n) (2) (H(4)bptc=3,3',4,4'-benzophenonetetracarboxylic acid, bpa = 1,2-bis(4-pyridyl)ethane and bpp = 1,3-bis(4-pyridyl)propane) were synthesized and structurally characterized. The crystal structures of compounds exhibit two kinds of ladder-like chains based on linear or T-shaped coordination environment of Ag(l). Fluorescence spectra of compounds I and 2 indicate the unusual intensity of fluorescent emission upon photoexcitation which may be attributed to ligand-to-metal charge transfer and Ag-Ag interactions. (C) 2009 Elsevier B.V. All rights reserved.