Surface Oxidation of Phenolic Aldehydes: Fragmentation, Functionalization, and Coupling Reactions.

ABSTRACT: Substantial amounts of phenolic aldehydes, represented by the structures of syringaldehyde, vanillin, and 4-hydroxybenzaldehyde, are emitted to the atmosphere during biomass burning. The oxidative transformation of phenolic aldehydes during atmospheric transport has the potential to modify the physicochemical properties of particulates, which play a vital role in Earth's climate and human health. Herein, thin solid films made of syringaldehyde, vanillin, and 4-hydroxybenzaldehyde are oxidized in contact with O₃(g) under a relative humidity of 74% representative of average global conditions. New physical insights into the surface reactions are achieved by analyzing isopropanol-extracted films before and during oxidation by multiple techniques. Changes in electronic transitions at

SUBMITTER: Rana MS 

PROVIDER: S-EPMC9512012 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature