Figure 1.

Normalized absorbance (A) and fluorescence (B) spectra of Pc 227 and the resulting photoproduct after irradiation with λ = 660 nm light (~3.5 mW cm ⁻²). (C) Schematic of homolytic bond cleavage and subsequent ligand exchange with water onto the central Si atomx to generate the PDT drug Pc 4 , as confirmed by MS spectrometry. UV-Vis (D) and fluorescence (E) spectra of Pc 227 in methanol before and after irradiation at 660 nm with the laser power of 0.082 mW.