Formation of poly(Azure A)-C60 photoactive layer as a novel approach in the heterogeneous photogeneration of singlet oxygen

Abstract

Fullerene, C60 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_C60/ITO) was characterized by means of cyclic voltammetry, UV-Vis, Raman and X-ray photoelectron spectroscopies. It was shown that PAA_C60/ITO exhibits strong absorption in both UV and Vis regions and that both immobilized photosensitizers, i.e. Azure A and C60, retain their photochemical activity towards 1 O2 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 1 O2 in the process of α-terpinene oxidation.

Electrochemical DNA Sensor Based on Poly(Azure A) Obtained from the Buffer Saturated with Chloroform

“…Both peak potentials of the polymer in acidic media (pH = 2.0–6.0) and anodic peak potential of the monomer depended linearly on the pH with the slope close to −59 mV/pH indicating equal number of the hydrogen ions and electrons transferred. This coincides well with the mechanism of Azure A electropolymerization proposed elsewhere for similar conditions of potential scanning [ 43 ]. An appropriate reaction scheme is presented in Figure 4 .…”

“…Changes observed can be attri influence of protonation-deprotonation within the polymer film on the electro between reduced and oxidized forms of the dye, both in monomeric and polym Both peak potentials of the polymer in acidic media (pH = 2.0-6.0) and a potential of the monomer depended linearly on the pH with the slope close to indicating equal number of the hydrogen ions and electrons transferred. Th well with the mechanism of Azure A electropolymerization proposed elsewh ilar conditions of potential scanning [43]. An appropriate reaction scheme is p Figure 4.…”

Covalent Immobilization of Organic Photosensitizers on the Glass Surface: Toward the Formation of the Light-Activated Antimicrobial Nanocoating

“…As in our previous works [ 49 , 50 ], α-terpinene was used as a chemical trap for the indirect detection of ROS by means of UV–Vis spectroscopy. Since α-terpinene is more stable under white-light illumination than other more common testing systems, such as DPBF in methanol, it was selected as a trap for this study.…”

New Approach in the Application of Conjugated Polymers: The Light-Activated Source of Versatile Singlet Oxygen Molecule

“…The glass-supported thin layers of CPs with perylene diimide units obtained by spin-coating were applied in the synthesis of ascaridole from α-terpinene [ 137 ]. Moreover, the electrochemical polymerization was proposed as a straightforward process of deposition of the photoactive conjugated films containing phenothiazine and/or fullerene sensitizers [ 138 , 139 , 140 , 141 ]. Lately, Zhou et al reported the polyimide nanosheets formed by combining the perylene core with triazine or heptazine blocks.…”