Natural anthraquinones probed as Type I and Type II photosensitizers: singlet oxygen and superoxide anion production

S.C. NÚÑEZ MONTOYA; L.R. COMINI; M. SARMIENTO; C. BECERRA; I. ALBESA; G.A. ARGÜELLO; J.L. CABRERA

J. Photochem. Photbiol. B: Biol.

Año: 2005 vol. 78 p. 77 - 77

font face="Times-Roman" size="1"> Some photophysical, photochemical and photobiological properties of nine anthraquinones (AQs) isolated from a phototoxic plant, Heterophyllaea pustulata, were studied. The photosensitized generation of superoxide anion radical (O2•−) and singlet molecular oxygen (1O2) by three of the nine AQs, namely heterophylline, pustuline and 5,5-bisoranjidiol was evaluated. Whereas the O2•− production (Type