Synthesis, structural characterization, stability, antibacterial activity and spectroscopic properties (THz) of five new polynuclear silver(I) complexes with 1,10-phenanthroline derivative and 1,3-bis(diphenylphosphino)propane (dppp)

Abstract

The reactions of 1,3-bis(diphenylphosphino)propane (dppp) and 1,10-phenanthroline derivative with Ag salts in the mixed solvent of methanol and dichloromethane generate the corresponding complexes, {[Ag2(dppp)2(phen)2](BF4)2(H2O)2}n (1) (dppp=1,3-bis(diphenylphosphino)propane), {[Ag2(dppp)2(dmp)2](CF3SO3)2}n (2), {[Ag2(dppp)2(dmp)2](BF4)}n (3) (dmp=neocuproine), {[Ag2(dppp)2(Bphen)2](CF3SO3)2}n (4) and {[Ag2(dppp)2(Bphen)2](ClO4)} (5) (Bphen=4,7-diphenyl-1,10-diazaphenanthrene). All the complexes are characterized by X-ray diffraction, luminescence, 31P, 1H NMR spectroscopy and terahertz (THz) spectra. These five complexes are of dinuclear structures. The topological analysis of simplified underlying nets reveals that complexes 1–4 have topologically promising architectures formed through hydrogen bonds (F⋯H–C) between the C–H groups of aromatic ring and anions. Thermogravimetric analysis (TGA) shows the complexes 1–5 possess good thermal stability up to 300°C.