Synthesis, characterization and luminescent properties of three-coordinate copper(I) halide complexes containing 2-(diphenylphosphino)biphenyl

Highly emissive three-coordinate copper halide complexes with a bidentate phosphine ligand have attracted attention. Here, a series of three-coordinate mono- and dinuclear copper halide complexes, [CuI(dpbp)(2)] (1) and [CuX(dpbp)](2) (dpbp=2-(diphenylphosphino)biphenyl, X=Br (2), Cl (3)), were synthesized, and their molecular structures and photophysical properties were investigated. In the solid state, these complexes exhibit green photoluminescence with microsecond lifetimes ((max)=515-538nm; =11.8-19.1s) at 298K. The emission of the complexes originates from the (sigma+X) * transition. All three complexes displayed good thermal stability. [GRAPHICS] .