Structure and Circularly Polarized Luminescence of Copper(I) Complexes Bearing Bipyridine and Chiral Diphosphine Ligands

Copper(I) (Cu(I)) complexes bearing chiral phosphine and diimine ligands were prepared, and their chiroptical properties studied. The complex with a twisted diimine ligand and a diphosphine ligand showed moderate-intensity emission and circularly polarized luminescence (CPL) with a considerable dissymmetry factor, gem. The signs and intensities in the CPL spectra were found to reflect the dihedral angles of the two pyridine rings in the diimine ligand. Copper(I) complexes bearing chiral phosphine and diimine ligands were prepared, and their chiroptical properties studied. The complex with a twisted diimine ligand and a diphosphine ligand showed moderate-intensity emission and circularly polarized luminescence (CPL) with considerable dissymmetry factor, gem. The signs and intensities in the CPL spectra were found to reflect the dihedral angles of the two pyridine rings in the diimine ligand.