Journal of Physical Chemistry B, Vol.111, No.19, 5372-5376, 2007
Electronic excitations in synthetic eumelanin aggregates probed by soft X-ray spectroscopies
Electronic excitations of condensed phase eumelanin aggregates are investigated with soft X-ray spectroscopies. Resonant photoemission data indicate that mechanisms of charge delocalization may occur when electrons are excited about 3 eV above the first unoccupied electronic level. An average, lower limit value of 1.6 fs was estimated for the lifetime of the excited C 1s-pi* states.