The active oxygen generating ability of m-THPC, including the formation of
singlet oxygen and superoxide anion radical species, was studied via spin t
rapping ESR spectroscopy. The mechanisms and the products associated with t
he self-sensitized photo-oxygenation of m-THPC in different solvents were a
lso characterised with the aid of quenching experiments in tandem with UV-v
isible and HPLC analyses. (C) 2001 Elsevier Science Ltd. All rights reserve
d.