2019
DOI: 10.1021/acs.chemrev.8b00395
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Highly Oxygenated Organic Molecules (HOM) from Gas-Phase Autoxidation Involving Peroxy Radicals: A Key Contributor to Atmospheric Aerosol

Abstract: Highly oxygenated organic molecules (HOM) are formed in the atmosphere via autoxidation involving peroxy radicals arising from volatile organic compounds (VOC). HOM condense on pre-existing particles and can be involved in new particle formation. HOM thus contribute to the formation of secondary organic aerosol (SOA), a significant and ubiquitous component of atmospheric aerosol known to affect the Earth’s radiation balance. HOM were discovered only very recently, but the interest in these compounds has grown … Show more

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Cited by 635 publications
(1,019 citation statements)
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References 264 publications
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“…For example, log saturation vapor concentrations ( C* in μg/m −3 ) of ELVOC, LVOC, and SVOC may range approximately from −10 to 3 (Schobesberger et al, ). ELVOC and LVOC together are usually denoted broadly as HOMs, although there are some cases where (E)LVOC and HOMs are not necessarily the same (Bianchi et al, ).…”
Section: Nucleation and Growth Mechanisms: New Results From Laboratormentioning
confidence: 99%
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“…For example, log saturation vapor concentrations ( C* in μg/m −3 ) of ELVOC, LVOC, and SVOC may range approximately from −10 to 3 (Schobesberger et al, ). ELVOC and LVOC together are usually denoted broadly as HOMs, although there are some cases where (E)LVOC and HOMs are not necessarily the same (Bianchi et al, ).…”
Section: Nucleation and Growth Mechanisms: New Results From Laboratormentioning
confidence: 99%
“…Several studies have quantified HOM yields from monoterpenes (Ehn et al, ; Ehn et al, ; Jokinen et al, ), isoprene (Jokinen et al, ), and AVOCs (e.g., alkyl benzenes; Molteni et al, ; Praske et al, ; S. Wang et al, ). The exact formation pathways and properties of HOMs are still under investigation (Berndt et al, ; Bianchi et al, ; Ehn et al, ).…”
Section: Nucleation and Growth Mechanisms: New Results From Laboratormentioning
confidence: 99%
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“…As part of this research, increased attention is likely to feed back to laboratory investigators that chamber studies are restricted to concentrations too high for relevance to contemporary ambient conditions. Autoxidation reactions [45,229], for example, may come into play in semi-volatile VOC oxidation to form highly oxidized molecules.…”
Section: Soa Thermo-kinetic Modelsmentioning
confidence: 99%
“…There are two important elements to HOM formation and their volatility distribution. The first is auto-oxidation itself, which 10 produces progressively more oxidized peroxy radicals via H-atom transfer and thus -OOH functionalization before the radicals ultimately terminate to form stable products. The second is dimerization, which is one of the termination processes, where these functionalized RO 2 associate to form a covalently bonded dimer (presumably a peroxide, ROOR).…”
mentioning
confidence: 99%