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

A P-stereogenic linear tetraphosphine tetraoxide, (R,R)- or (S,S)-dpmppm(=O) 4 , was synthesized to prepare C 2 dinuclear M(hfa) 3 complexes (M=Eu, Tb, Y) as the first example of lanthanide(III) complexes with P-chiral multidentate phosphine oxides. The mononuclear M(hfa) 3 complexes (M=Eu, Y) with a P-chiral diphosphine dioxide, tpdpb(=O) 2 , were also prepared, and comparison of their photophysical properties for the Eu III complexes revealed that significant chiral induction from the P-chiral centers arises on the achiral M(hfa) 3 units through intramolecular π-π stacking constraint in the dinuclear system.