Polymeric bound porphyrines and their precursors, 3. Photoredox properties of combined moieties of porphyrine and phthalocyanine, covalently bound to polystyrene

Copolymers containing covalently bound phthalocyanine moieties (4) or tetraphenylporphyrine moieties (5) were prepared by the reaction of partially chloromethylated polystyrene (3) with the low molecular substituted phthalocyanine 1b and tetraphenylporphyrine 2b, respectively. Combined binding of moieties of 1b and 2b yielded polymer 6. The photoredox behavior of 1, 2, 4, 5 and 6 was investigated under irradiation with visible light in the presence of a donor and an acceptor. Mixtures of sensitizers (1 + 2 and 4 + 5) resulted in reduced photocatalytic properties. Only in the case of 6, due to reduced intermolecular interactions, higher yields of photochemical reaction products were obtained.