Answers are grounded in this paper and cite their sources.
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.
No takes yet. Share an insight, caveat, or question.
Sangaletti et al. (2007) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: