Radical intermediates induced by porphyrin triplets.
In the photochemical reactions of triplets of both protoporphyrin-IX-dimethyl-ester (PP) and haematoporphyrin dihydrochloride (HP) with alpha-phenyl-ethyl hydroperoxide (HROOH) in C6H6 at room temperature, both O-O and C-C bonds are broken yielding alkoxy and carbon-centred radicals. The ruptures of C-C and O-H bonds were observed in the photochemical reaction of PP with tert-butanol in the same solvent, yielding alkoxy and carbon-centred radicals at lambda greater than or equal to 366 nm, while HP did not react photochemically with tert-butanol at lambda greater than or equal to 334 nm.
Móger
G
G
Central Research Institute for Chemistry of the Hungarian Academy of Sciences, Budapest.
Györ
M
M
Vidóczy
T
T
Gál
D
D
D005609:Free Radicals; D009369:Neoplasms / Q000188:drug therapy; D010777:Photochemistry; D010778:Photochemotherapy; D011166:Porphyrins / Q000737:chemistry / Q000528:radiation effects*; D013113:Spin Labels
D005609:Free Radicals; D011166:Porphyrins; D013113:Spin Labels