“…Chiral lanthanide(III) complexes have attracted surging attention in developing photo-functional materials by the use of chiroptical properties with an aim of probing and sensing various chiral biomolecules. [1][2][3][4][5][6][7][8] Besides the chiral multidentate ligand systems developed for photoluminescent lanthanide complexes, such as C-chiral O,N-donor ligands of 3-fluoroalkanoyl-d-camphorate, [9][10][11][12] pyridine-2,6-bis(carboxamides), [13][14][15] pyridine-2,6-bis(oxazolines), [16][17][18] and so on, multidentate phosphine oxides are thought to be promising as their steric bulkiness could prevent the high-energy vibrational solvent molecules from coordinating to the metal center and the low vibrational energy of phosphoryl group suppress nonradiative deactivation of the 4f-4f excited states. In this regards, an axischiral diphosphine dioxide, (R/S)-2,2'-bis(diphenylphosphoryl)-1,1'-binaphthyl ((R/S)-BINAPO), was used to induce chiral property on Eu(hfa) 3 chromophore (hfaH = 1,1,1,5,5,5-hexafluoropentane-2,4-dione), [11,19] and however, other phosphine oxides including P-stereogenic multidentate phosphine oxides have no longer been investigated hitherto.…”