Abstract
The aim of the study was to investigate and compare photophysical properties of the most modern formulations used in the world – derivatives of: porphyrin, chlorines, bacteriochlorins, phthalocyanines and phenothiazines. Useful parameters of comparing the emission properties of various sensitizers groups are quantum yield of singlet oxygen generation (ΦT) and quantum yields of fluorescence (ΦF). The emission and excitation characteristics were appointed and shown as excitation – emission matrices (EX – EM). The influence of the monomerization degree of the pure hematoporphyrin (HP) on the quantum yield was also measured. Received quantum yield values of commonly used sensitizers are in the range 0.05 – 0.3 and efficiency values of singlet oxygen generation are 0.3 – 0.7. These values depend not only on the chemical structure of the compounds, but also on solvent polarity, temperature and concentration which is decisive for the monomerization degree.
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