Used as a ligand precursor in catalytic systems, particularly in asymmetric synthesis where its chiral binaphthyl backbone influences stereoselectivity. The phosphine oxide groups can be reduced to phosphines, enabling coordination to transition metals such as ruthenium, rhodium, or palladium for use in hydrogenation, C–C coupling, and other enantioselective transformations. Its stability and rigid structure make it valuable in designing catalysts for pharmaceutical and fine chemical production. Also employed in materials science for constructing phosphorescent complexes and as a building block in supramolecular chemistry due to its defined geometry and donor properties.