Resonant Auger spectroscopy of poly(4-hydroxystyrene)

The electronic structure of poly(4-hydroxystyrene) (PHS), which presents strong similarities with that of phenol, has been studied via resonant Auger spectroscopy. Spectator shifts and relative intensities of participator channels are extracted from our data. Symmetry considerations on the occupied and unoccupied molecular orbitals (MO) are helpful in the assignment of the resonating valence band structures of PHS. However they are clearly not sufficient to explain the MO intensities when close-lying intermediate electronic states are involved, as interference effects may play an important role.