Photodynamic activity of platinum(IV) chloride surface-modified TiO2 irradiated with visible light

The visible light-induced phototoxicity of titanium dioxide modified with platinum(IV) chloride complexes, [TiO2/PtCl4], was tested. In vitro experiments with the mouse melanoma cells (S-91) have demonstrated phototoxicity of the [TiO2/PtCl4] material. Detection of efficiently generated various reactive oxygen species (•OH, O2•−, H2O2, 1O2) and also reactive chlorine species has proven the photodynamic activity of the tested material, induced by visible light (λ > 455 nm). The cellular death (recognized as a necrosis) is a result of the cell membrane peroxidation.