Photoproduction Rates of One-Electron Reductants by Chromophoric Dissolved Organic Matter via Fluorescence Spectroscopy: Comparison with Superoxide and Hydrogen Peroxide Rates was written by Le Roux, Danielle M.;Powers, Leanne C.;Blough, Neil V.. And the article was included in Environmental Science & Technology in 2021.HPLC of Formula: 38183-12-9 This article mentions the following:
One-electron reductants (OER) photoproduced by chromophoric dissolved organic matter (CDOM) have been shown to be likely precursors for the formation of superoxide and subsequently hydrogen peroxide. An improved method that employs a nitroxide radical probe (3AP) has been developed and utilized to determine the photoproduction rates of OER from a diverse set of CDOM samples. 3AP reacts with OER to produce the hydroxylamine, which is then derivatized with fluorescamine and quantified spectrofluorometrically. Although less sensitive than traditional methods for measuring RO2 , measuring RH provides a simpler and faster method of estimating RO2 and is amenable to continuous measurement via flow injection anal. Production rates of OER (RH), superoxide (RO2), and hydrogen peroxide (RH2O2) have a similar wavelength dependence, indicating a common origin. If all the OER react with mol. oxygen to produce superoxide, then the simplest mechanism predicts that RH/RH2O2 and RO2/RH2O2 should be equal to 2. However, our measurements reveal RH/RH2O2 values as high as 16 (5.7-16), consistent with prior results, and RO2/RH2O2 values as high as 8 (5.4-8.2). These results indicate that a substantial fraction of superoxide (65-88%) is not undergoing dismutation. A reasonable oxidative sink for superoxide is reaction with photoproduced phenoxy radicals within CDOM. In the experiment, the researchers used many compounds, for example, 4-Phenyl-3H,3’H-spiro[furan-2,1′-isobenzofuran]-3,3′-dione (cas: 38183-12-9HPLC of Formula: 38183-12-9).
4-Phenyl-3H,3’H-spiro[furan-2,1′-isobenzofuran]-3,3′-dione (cas: 38183-12-9) belongs to benzofurans derivatives. Many natural or synthetic compounds containing benzofuran skeletons have been found to possess remarkable activity as agrochemicals and pharmaceuticals. They are also prone to polymerisation in the presence of concentrated mineral acids and Lewis acids.HPLC of Formula: 38183-12-9
Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem