Solvent effects on rates of photochemical reactions of rose bengal triplet state studied by nanosecond laser photolysis

Study on the aggregation and electrochemical properties of Rose Bengal in aqueous solution of cyclodextrins

“…The relative intensity of shoulder to the peak is usually used as a measure of the aggregation of RB in solution [6,7]. In water, at a concentration of 2.5 × 10 − 5 M, this relative intensity, 0.37, indicates that RB is mainly present as monomer.…”

Singlet molecular oxygen application for 2-chlorophenol removal

“…3 shows a comparison of experimental data for neutral and alkaline solution with theoretical course according to Eq. (2). The values of rate constant of 1 O 2 decay in water, k d and quantum yield of 1 O 2 formation φ were taken from literature [18].…”

“…Essential from the point of view of 1 O 2 formation is the adsorption of oxygen in places of the photosensitizer immobilization. The lifetime of excited RB is about 150 s [2], and in the gel, it is probably extended, which should not hinder the diffusion of oxygen from quite distant places on the surface. Hence, it can be supposed that 2-CP and oxygen can be adsorbed in the same active centers.…”

“…The excited triplet state of the sensitizer can transfer energy to ubiquitous molecular oxygen producing singlet molecular oxygen. The excited sensitizer can also participate in electron transfer process often initiating radical reactions [1,2].…”

“…2 ecosystem in aquatic bodies and human health. Studies in this field can help clearing up and understanding self-repairing processes that take place in water reservoirs.…”