Symmetry assignments of excited states of [Pt2H8P8O20]4− by polarization ratio spectroscopy

Linear polarization ratios were measured on the title compound. The symmetry of the lowest excited singlet state was confirmed as ¹A_2u. Emission from the triplet term was negatively polarized when excitation occurred in the strong singlet but positively polarized upon excitation directly to the triplet, confirming the E_U symmetry assignment of the emitting triplet component.