Unusual aggregates from the oxidation of alkene self-assembled monolayers: a previously unrecognized mechanism for SAM ozonolysis?

Journal Article · Fri Sep 30 00:00:00 EDT 2005 · Physical Chemistry Chemical Physics. PCCP, 7:3605-3609

DOI:https://doi.org/10.1039/b508147e· OSTI ID:876907

Mcintire, Theresa M; Lea, Alan S; Gaspar, Dan J; Jaitly, Navdeep; Dubowski, Y; Li, Qiquang; Finlayson-Pitts, Barbara J

Airborne particles are important in climate, visibility, human health and atmospheric reactions. Organics associated with airborne particles are thought to be oxidized to polar, hygroscopic species with enhanced cloud-nucleating properties. We show that ozone oxidation of unsaturated organics on silica as a proxy for airborne dust leads to the formation of hydrophobic polymer balls which do not increase the uptake of water as previously assumed. We propose that atmospheric formation of hydrophobic polymers is generally controlled by the availability of water rather than acid, and hence is much more common in the lower atmosphere than previously recognized.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 876907
• Report Number(s): PNNL-SA-44568; 12890; 3060; KP1704020; TRN: US200608%%204
• Journal Information: Physical Chemistry Chemical Physics. PCCP, 7:3605-3609, Vol. 7
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ALKENES
DUSTS
OXIDATION
OZONE
PARTICULATES
ATMOSPHERIC CHEMISTRY
Environmental Molecular Sciences Laboratory