Photochemistry and Photophysics of Shinorine Dimethyl Ester

MARÍA FLORENCIA FANGIO; CARIGNAN, MARIO O; MARÍA SANDRA CHURIO; MARTÍN POBLET; CARRETO, JOSÉ I.; DALILA ELISABET ORALLO; LUIS BERNAL; SONIA GRACIELA BERTOLOTTI

PHOTOCHEMISTRY AND PHOTOBIOLOGY

WILEY-BLACKWELL PUBLISHING, INC

Lugar: Londres; Año: 2018 vol. 94 p. 829 - 833

0031-8655

The photostability and photophysical properties of the dimethyl ester of the mycosporine-like mino acid shinorine have been experimentally evaluated in aqueous solution and in the presence of direct micelles prepared with a cationic or an anionic detergent, respectively. In comparison with shinorine, the ester molecule increases the photostability, the fluorescence 18 quantum yield and the fluorescence lifetime in water as well as in the micellar solutions. The 19 effects are more pronounced in sodium dodecyl sulfate solutions and suggest that the electrostatic attractions with the micellar interface contribute to limit the movement of the molecules and influence the relative rate of their deactivation channels. However, the predominance of the non-radiative decay is maintained together with the UV photoprotective ability of this atypical mycosporine species.