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. Author manuscript; available in PMC: 2011 Dec 22.
Published in final edited form as: Mol Membr Biol. 2010 Oct 13;27(7):364–381. doi: 10.3109/09687688.2010.507788

Figure 1. Chemical structures of various photosensitizing chemical agent (PSA).

Figure 1

Majority of photosensitizing chemical agents (PSA) may be classified into four main categories according to their chemical structures, including porphyrins, chlorins, porphycenes, and phthalocyanines. Each PSA features a peak absorbance wavelength, typically in the red light region of the spectrum.