The mechanism of photochemical reactions of pyrenetetrasulfonate (PyTS) in aqueous solution was studied using laser flash photolysis-transient absorption spectrum techniques under irradiation at 355 nm. The characteristic absorption peaks of the excited singlet (PyTS 1* ) at 260 nm, the excited triplet (PyTS 3* ) at 300 nm, and the anion radical (PyTS -• ) at 330 nm were first confirmed. Self-quenching and reaction with PyTS were regarded as the main decay channels for hydrated electrons (eaq), and the pseudo-first-order rate constant of hydrated electrons with PyTS was determined to be 2.71 0 5 s −1 . The quantum yield of eaq generated via two-photon ionization of PyTS was computed to be 3.2´10 −2 under these conditions.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.