Abstract
The singlet oxygen ( 1 O 2 ) production abilitity is an important factor to assess their potential as effective of photosensitizers. In this paper, the 1 O 2 production rate, production rate constant and quantum yield of silicon(IV) phthalocyanine axially bearing 1-3 generation dendritic substituents were evaluated by a high performance liquid chromatographic method. The results show that the 1 O 2 production rate and production rate constant of these compounds increase gradually with dendritic generations increase. And the 1 O 2 quantum yield of silicon(IV) phthalocyanine with first generation dendritic ligand was the highest. This may be due to the isolation effect of the dendritic ligands on the phthalocyanine core. The parameters of the observed 1 O 2 production properties will provide valuable data for these dendrimer phthalocyanines as promising photosensitizer in PDT application.
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