Synthesis, characterization, coordination chemistry, and luminescence studies of copper, silver, palladium, and platinum complexes with a phosphorus/nitrogen/phosphorus ligand

[Display omitted] •Various coordination modes were obtained by a PNP ligand with Cu, Ag, Pt, and Pd.•Complexes were characterized by X-ray Crystallography, 1H NMR, 31P{1H} NMR, HRMS, EA.•Absorption and luminescence behaviors were reported; NMR and MS data were discussed. Complexes of copper, silver, platinum, and palladium with N,N-bis[2-(diphenylphosphino)ethyl]-phenylamine (a PNP ligand) have been synthesized and characterized by 1H NMR, 31P{1H} NMR, HRMS, Elemental Analysis, and X-ray Crystallography. NMR data that were obtained at various temperatures resulted in different patterns in terms of peak multiplicity and coupling constants. Absorption and luminescence behaviors were reported, NMR and MS data were discussed and the coordination modes were investigated. The platinum complex that was synthesized in the present study was found to be a trans complex (by X-ray diffraction and 31P{1H} NMR data) contrary to the 31P{1H} NMR data for the cis isomer published last year in the literature by Kostas I. D. et al.