Photogenerated aryl mesylate and aryl diethyl phosphate radical cations. A time-resolved spectroscopy investigation.

BONESI S. M.; PROTTI, STEFANO; ANDREA CAPUCCIATI; FAGNONI MAURIZIO

NEW JOURNAL OF CHEMISTRY

ROYAL SOC CHEMISTRY

Lugar: CAMBRIDGE; Año: 2022 vol. 46 p. 12589 - 12599

1144-0546

10.1039/D2NJ01755EThe mono electronic oxidation of aryl mesylates and aryl diethylphosphates in organic/aqueous mixture in the presence of ammonium persulfate was investigated by means of time-resolved spectroscopy. The photoinduced electron transfer (ET) between the photogenerated SO4?-radical anion and the examined substrates showed rate constants (kET) in the order of 109-1010M-1s-1and the generated radical cations exhibit abroad absorption band(350-550 nm) with lifetime values in the 7-62 s range, depending on the nature of the aromatic substituents. A satisfactory correlation between log(kET) and G0ET demonstrates that the ET process follows the Marcus model.