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

Two novel 1D compounds {[Ag3(Hbptc)(bpa)2]·H2O}n (1) and [Ag2(H2bptc)(bpp)2]n (2) (H4bptc = 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(I). Fluorescence spectra of compounds 1 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.

Two novel coordination compounds were constructed from H4bptc and auxiliary ligands (bpa and bpp) (H4bptc = 3,3′,4,4′-benzophenonetetracarboxylic acid, bpa = 1,2-bis(4-pyridyl)ethane and bpp = 1,3-bis(4-pyridyl)propane). Interestingly, the crystal structures of compounds 1 and 2 exhibit two kinds of ladder-like chains based on linear or T-shaped coordination environments of Ag(I). The chains are stacked to result in novel 3D supermolecular structures via strong hydrogen-bond and π–π stacking interactions.Figure optionsDownload as PowerPoint slide