Time-resolved EPR observation of synthetic eumelanin-superoxide radical pairs.
TR-EPR spectra of UV irradiated synthetic eumelanin in equilibrium with air oxygen, reveal the formation of melanin-superoxide radical pairs and allow to determine both the electron dipolar interaction D and the exchange interaction J between the two radicals.
Toffoletti
Antonio
A
Department of Chemical Sciences, University of Padova, via Marzolo, 1-35131 Padova, Italy. antonio.toffoletti@.unipd.it
Conti
Fosca
F
Sandron
Tommaso
T
Napolitano
Alessandra
A
Panzella
Lucia
L
D'Ischia
Marco
M
D004578:Electron Spin Resonance Spectroscopy; D008543:Melanins / Q000737:chemistry*; D010084:Oxidation-Reduction; D013481:Superoxides / Q000737:chemistry*; D013995:Time
D008543:Melanins; D013481:Superoxides; C041877:eumelanin