The phosphorescence polarization is (with the phosphorescence lifetime) another indicator of the emitting state character . Experimentally, one expects a 3 n* emission in the molecular plane and a 3 * emission perpendicular to the molecular plane . Eqs. ( ) and ( ) corroborate these emission directions, with 3 n* and 3 * emissions polarized in the z-and x-directions, respectively. However, these polarization directions are only significantly preferential in 3 n*, for which the permanent dipole terms dominate. ( )