Molecular Insights into the Quenching Mechanism of the Triplet Excited State of Rose Bengal through Oxidative and Reductive Organic Compounds.

ABSTRACT: In oxygenated aquatic environments, the predominant scavenging of the triplet excited state of chromophoric dissolved organic matter (³CDOM*) involves dissolved ground-state oxygen, diverting attention away from the scavenging mechanisms of ³CDOM* mediated through specific organic compounds. Previous studies demonstrated that model ³CDOM* exhibited quantum yields (i.e., 1-56%) in the formation of radical ions, resulting from the competition between physical and chemical quenching through a common exciplex intermediate. Physical quenching was rationalized through the reverse intersystem crossing of the exciplex, followed by back electron transfer, yielding ground-state reactants. Despite this, direct experimental evidence for exciplex involvement has been el

SUBMITTER: Barrios B 

PROVIDER: S-EPMC11391539 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature