Spectroscopic characterization of two peroxyl radicals during the O₂-oxidation of the methylthio radical.

ABSTRACT: The atmospheric oxidation of dimethyl sulfide (DMS) yields sulfuric acid and methane sulfonic acid (MSA), which are key precursors to new particles formed via homogeneous nucleation and further cluster growth in air masses. Comprehensive experimental and theoretical studies have suggested that the oxidation of DMS involves the formation of the methylthio radical (CH₃S•), followed by its O₂-oxidation reaction via the intermediacy of free radicals CH₃SO_x• (x = 1-4). Therefore, capturing these transient radicals and disclosing their reactivity are of vital importance in understanding the complex mechanism. Here, we report an optimized method for efficient gas-phase generation of CH₃S• through flash pyrolysis of S-nitrosothiol CH₃

SUBMITTER: Wu Z 

PROVIDER: S-EPMC9814412 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature