Phenothiazine (PTZ) was purchased from Sigma Aldrich (Poland). Photoinitiator Omnirad 819 was purchased from IGM resins (The Netherlands). Ethyl acetate (EtOAc) and methanol were purchased from Chempur (Poland). HEMA was used after distillation under reduced pressure; all other reagents were used as received. Magnesium chips and titanium (IV) butoxide were purchased from Sigma Aldrich (Poland), and n-butanol was purchased from Eurochem BGD (Poland). Murine fibroblast cell line, L929, as well as all cell culture reagents were purchased from Sigma Aldrich (Poland). All disposable cell culture plasticware was purchased from VWR (Poland).