ABSTRACT
Chromophores [Ch; carbonyl compounds formed in Eq. (6)] absorb actinic sunlight radiation and are transformed in the excited singlet (lCh*) and triplet (3Ch*) states [Eq. (8)] (8,10). Excited chromophores transfer the electronic energy to the polymer PH or ground-state oxygen and sensitize formation of macroalkyls [Eq. (9a)] or singlet molecular oxygen [Eq. (9b)]. Moreover, they accelerate homolysis of hydroperoxides by an exciplex [Eq. (9b), Scheme 3].
