Atmospheric β-caryophyllene-derived ozonolysis products at interfaces

Ariana Gray Bé, Hilary M. Chase, Yangdongling Liu, Mary Alice Upshur, Yue Zhang, Aashish Tuladhar, Zizwe A. Chase, Aleia D. Bellcross, Hong Fei Wang, Zheming Wang, Victor S. Batista, Scot T. Martin, Regan J. Thomson*, Franz M. Geiger

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


By integrating organic synthesis, secondary organic aerosol synthesis and collection, density functional theory (DFT) calculations, and vibrational sum frequency generation (SFG) spectroscopy, we identify close spectral matches between the surface vibrational spectra of β-caryophyllene-derived secondary organic material (SOM) and those of β-caryophyllene aldehyde and β-caryophyllonic acid at various interfaces. Combined with the record high surface tension depression described previously for these same oxidation products, we discuss possibilities for an intrinsically chemical origin for cloud activation by terpene-derived surfactants. Although the present study does not unequivocally identify the synthesized and analyzed oxidation products on the β-caryophyllene-derived SOM surfaces, these two compounds appear to be the most surface active out of the series and have also been foci of previous β-caryophyllene field and laboratory studies. An orientation analysis by phase-resolved SFG spectroscopy reveals a "pincer-like" configuration of the β-caryophyllene oxidation products, albeit on a model quartz surface, that somewhat resembles the orientation of inverse double-tailed surfactants at the surfaces of biological systems. The structural information suggests that the less polar moiety of a surface-localized oxidation product, such as those studied here, may be the first site-of-contact for a gas-phase molecule approaching an SOA particle containing surface-active β-caryophyllene oxidation products.

Original languageEnglish (US)
Pages (from-to)158-169
Number of pages12
JournalACS Earth and Space Chemistry
Issue number2
StatePublished - Feb 21 2019


  • Sum frequency generation (SFG) spectroscopy
  • density functional theory (DFT) calculations
  • phase-resolved SFG
  • secondary organic material (SOM)
  • sesquiterpene chemistry
  • β-caryophyllene ozonolysis

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Atmospheric Science
  • Space and Planetary Science

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