Energy transfer between singlet (1Delta(g)) and triplet (3Sigma(g)-) molecular oxygen in aqueous solution.
We clearly demonstrate the occurrence of energy transfer between 18O2 (1Deltag) and 16O2 in the ground state (3Sigmag-) with subsequent conversion of the latter species into its singlet excited state (1Deltag) in aqueous solution. This was inferred from the results of incubation experiments involving DHPN18O2 as a chemical generator of 18O2 (1Deltag) 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.
Martinez
Glaucia R
GR
Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, C.P. 26077, CEP 05513-970, Bloco 12 sala 1223, São Paulo, Brazil.
Ravanat
Jean-Luc
JL
Cadet
Jean
J
Miyamoto
Sayuri
S
Medeiros
Marisa H G
MH
Di Mascio
Paolo
P