The first ternary europium tetraphenylimidodiphosphinate complex: X-ray structure and photoluminescent properties

► The first case of ternary Eu(III) tetraimidodiphosphinate complex with heterocyclic co-ligand. ► X-ray analysis reveals highly distorted coordination pattern around Eu(III) cation. ► Dramatic enhancement of the photoluminescence quantum yield for ternary complex.