PHOTOCHEMICAL SENSITIZATION BY 7‐METHYLBENZ[c]ACRIDINE AND RELATED COMPOUNDS

Abstract

Abstract. The carcinogenic environmental contaminant, 7‐methylbenz[c]acridine (7MBAC), generates singlet oxygen in high yield when irradiated with near‐UV light. The photophysical and photochemical properties are reported for 7MBAC and several related acridine, anthracene and benzanthracene derivatives in aqueous surfactant solutions and in methanol. Singlet oxygen production was assessed by measuring the rates of oxygen uptake in irradiated solutions containing oxidizable substrates, such as 2,5‐dimethylfuran or histidine. Relative yields of free radical production from the irradiated sensitizers were determined by the initiation of free radical polymerization of acrylamide.

Evaluation of the Use of Solar Irradiation for the Decontamination of Soils Containing Wood Treating Wastes

“…Their results have been supported by others. 36 ' 37 Similar results have been obtained in solution photolysis experiments with other PAHs used as the substrate or sensitizer, including: pyrene, 38 7-methylbenz-(c)acridine, 39 and carbazole. 40 The mechanisms for compound photodegradation in these experiments appear to involve both direct photolysis and absorption of light by one or more sensitizers which generate singlet oxygen.…”

Singlet oxygen O2(1.DELTA.g) bimolecular processes. Solvent and compartmentalization effects

“…On the other hand, the pH difference between the bulk solution and the charged interfaces can influence the efficiency of 02(xAg) production298-300 and the reactivity of those substrates whose reactions are pH sensitive. 299,[301][302][303][304][305] VI11.1. Micelles Micelles are rather small structures (d = 3 nm) in which a higher oxygen solubility than in the surrounding aqueous solution can be expected.…”