Photobleaching of Erythrosine B in Aqueous Environment Investigation Beyond pH was written by Kravchenko, Olga;Sutherland, Todd C.;Heyne, Belinda. And the article was included in Photochemistry and Photobiology in 2022.SDS of cas: 16423-68-0 This article mentions the following:
In the scientific literature, the term aqueous environment is loosely employed as it encompasses a broad range of different buffering agents. While there is an increasing number of exptl. evidence that point toward specific buffer effects extending far beyond pH, the impact of the chem. nature of the buffering ions is often disregarded, especially in photochem. studies. Herein, we highlighted the importance of buffer specific effects on both the photobleaching and the singlet oxygen quantum yields of a dye in aqueous environments. For this study, we chose erythrosine B (EB) as our model photosensitizer as its photochem. and photobleaching are well documented in the literature. We followed EB’s photobleaching via absorption spectroscopy in four different aqueous solvents, including pure water, phosphate, Tris and HEPES buffer. These buffer systems were selected because they are commonly used in biochem. and biol. applications. Our results show that specific buffer effects cannot be neglected. Indeed, the singlet oxygen quantum yield for EB is significantly different in HEPES compared to the other solvents. Furthermore, we showed that EB’s photoproduct is highly dependent on the nature of the chem. buffer being used. In the experiment, the researchers used many compounds, for example, Sodium 2′,4′,5′,7′-tetraiodo-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-bis(olate) (cas: 16423-68-0SDS of cas: 16423-68-0).
Sodium 2′,4′,5′,7′-tetraiodo-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-bis(olate) (cas: 16423-68-0) belongs to benzofurans derivatives. Benzofurans are compounds with a planar structure having 10 pi electrons that include the lone pair on oxygen atom, which makes it more susceptible to electrophilic attack. They are also prone to polymerisation in the presence of concentrated mineral acids and Lewis acids.SDS of cas: 16423-68-0
Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem