American Chemical Society
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Energy Transfer between Singlet (1Δg) and Triplet (3Σg-) Molecular Oxygen in Aqueous Solution

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journal contribution
posted on 2004-03-17, 00:00 authored by Glaucia R. Martinez, Jean-Luc Ravanat, Jean Cadet, Sayuri Miyamoto, Marisa H. G. Medeiros, Paolo Di Mascio
We clearly demonstrate the occurrence of energy transfer between 18O2 (1Δg) and 16O2 in the ground state (3Σg-) with subsequent conversion of the latter species into its singlet excited state (1Δg) in aqueous solution. This was inferred from the results of incubation experiments involving DHPN18O2 as a chemical generator of 18O2 (1Δg) and the water-soluble disodium salt of anthracene (EAS) used as a chemical trap of singlet oxygen. The products of the reaction were accurately analyzed by HPLC-ESI-MS.