Applied Surface Science, Vol.457, 221-228, 2018
Formation of poly(Azure A)-C-60 photoactive layer as a novel approach in the heterogeneous photogeneration of singlet oxygen
Fullerene, C-60 photosensitizer was incorporated into poly(Azure A) in the process of electrochemical polymerization from the solution of corresponding dye and fullerene. The synthesized organic layer (PAA_C-60/ITO) was characterized by means of cyclic voltammetry, UV-Vis, Raman and X-ray photoelectron spectroscopies. It was shown that PAA_C-60/ITO exhibits strong absorption in both UV and Vis regions and that both immobilized photosensitizers, i.e. Azure A and C-60, retain their photochemical activity towards O-1(2) generation under illumination as tested with 2,3,4,5-tetraphenylcyclopentadienone (TPCPD) singlet oxygen quencher. The electrodeposited photoactive layer composed of two photosensitizers was investigated as a source of O-1(2) in the process of alpha-terpinene oxidation.
Keywords:Photoactive layers;Singlet oxygen photogeneration;Phenothiazines;Fullerene;Photosensitizers' immobilization