Evaluating the Microheterogeneous Distribution of Photochemically Generated Singlet Oxygen Using Furfuryl Amine.

ABSTRACT: Singlet oxygen (¹O₂) is an important reactive species in natural waters produced during photolysis of dissolved organic matter (DOM). Prior studies have demonstrated that ¹O₂ exhibits a microheterogeneous distribution, with [¹O₂] in the interior of DOM macromolecules ∼30 to 1000-fold greater than in bulk solution. The [¹O₂] profile for DOM-containing solutions has been determined mainly by the use of hydrophobic probes, which are not commercially available. In this study, we employed a dual-probe method combining the widely used hydrophilic ¹O₂ probe furfuryl alcohol (FFA) and its structural analogue furfuryl amine (FFAm). FFAm exists mainly as a cation at pH <9 and was therefore h

SUBMITTER: Cheng K 

PROVIDER: S-EPMC10853930 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature