Chiral Dinuclear Eu , Tb , and Y Complexes Supported by P-Stereogenic Linear Tetraphosphine Tetraoxide.

A P-stereogenic linear tetraphosphine tetraoxide, (R,R)- or (S,S)-dpmppm(=O) , was synthesized to prepare C dinuclear M(hfa) complexes (M=Eu, Tb, Y) as the first example of lanthanide(III) complexes with P-chiral multidentate phosphine oxides. The mononuclear M(hfa) complexes (M=Eu, Y) with a P-chiral diphosphine dioxide, tpdpb(=O) , were also prepared, and comparison of their photophysical properties for the Eu complexes revealed that significant chiral induction from the P-chiral centers arises on the achiral M(hfa) units through intramolecular π-π stacking constraint in the dinuclear system.