The syntheses, characterization and photophysical properties of phosphine copper(I) and silver(I) complexes with the bispyridylpyrrolide ligand

摘要

Five mononuclear copper(I) complexes and one dinuclear silver(I) phosphine complex containing the bispyridylpyrrole ligand were synthesized and structurally characterized. Treatment of CuCl and the deprotonated bispyridylpyrrole ligand with bis(phosphine) ligands afforded the copper(I) complexes [(PDPH)Cu(XANTPhos)] (1), [(PDPH)Cu(DPEPhos)] (2), [(PDPBr)Cu(XANTPhos)] (3) and [(PDPBr)Cu(DPEPhos)] (4), while addition of two equivalences of PPh3 gave [(PDPBr)Cu(PPh3)(2)] (5), where PDPH- = 2,5-bis(2-pyridyl)pyrrole, PDPBr- = 2,5-bis(6'-bromo-2'-pyridyl)-pyrrole, XANTPhos = 9,9-di-methyl-4,5-bis(diphenylphosphino)xanthene, DPEPhos = oxydi-2,1-phenylene)bis-diphenylphosphine. Reaction of PDPBr- with AgOTf and DPEPhos yielded the dinuclear silver(I) complex [(PDPBr)Ag-2(DPEPhos)](OTf) (6). All of these complexes were fully characterized on the basis of IR spectra, H-1 and P-31 NMR spectra, elements analysis, UV-Vis spectra and X-ray single crystal diffraction analysis. The photophysical properties of these complexes were also studied. (C) 2015 Elsevier Ltd. All rights reserved.