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- W2015803544 abstract "An analysis of the spectral changes of porphyrins in aqueous solutions detected upon irradiation with visible light shows that a few photoprocesses take place. The decrease in absorption and emission intensity throughout the whole spectra reflects: (1) a photoinduced destruction of the porphyrin macrocycle and (2) a photoinduced chemical modification leaving the porphyrin macrocycle intact. The photodestruction of the porphyrin macrocycle is related to: (1) the formation of di- and mono-pyrrolic photoproducts absorbing in the UV and (2) the formation of negligible amounts of bilirubin-like photoproducts with the emission maximum at 545 nm. Another photoprocess is related to the formation of chlorin and bacteriochlorin type photoproducts with absorption maxima at about 640 - 660 nm, maintaining the porphyrin macrocycle intact. A scheme of the photomodifications of porphyrins is presented. The phototransformations of sensitizers should be taken into account in clinical photochemotherapy." @default.
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- W2015803544 date "1996-01-31" @default.
- W2015803544 modified "2023-10-06" @default.
- W2015803544 title "<title>Light-induced processes in aqueous solutions of porphyrins</title>" @default.
- W2015803544 doi "https://doi.org/10.1117/12.230961" @default.
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