Barbara J. Finlayson-Pitts

About

Barbara J. Finlayson-Pitts is a Distinguished Professor and Codirector of AirUCI at the University of California, Irvine. She is a faculty member in the Department of Chemistry, where her research interests focus on Analytical Atmospheric and Environmental Physical Chemistry and Chemical Physics. Her work involves studying the chemical processes occurring in the atmosphere, contributing to a deeper understanding of environmental chemistry and atmospheric reactions.

Selected publications

• Predicting the environmental fates of emerging contaminants: Synergistic effects in ozone reactions of nitrogen-containing alkenes

  Science Advances · 2023-03-03 · 22 citations

  articleOpen accessSenior authorCorresponding

  While nitro and amino alkenes are common in pharmaceuticals, pesticides, and munitions, their environmental fates are not well known. Ozone is a ubiquitous atmospheric oxidant for alkenes, but the synergistic effects of nitrogen-containing groups on the reactions have not been measured. The kinetics and products of ozonolysis of a series of model compounds with different combinations of these functional groups have been measured in the condensed phase using stopped-flow and mass spectrometry met…

  PublisherDOI

• Toward a molecular understanding of the surface composition of atmospherically relevant organic particles

  Proceedings of the National Academy of Sciences · 2022-08-22 · 17 citations

  articleOpen accessSenior author

  Many mass spectrometry methods using various ionization sources provide bulk composition of airborne particles, but little is known about the surface species that play a major role in determining their physicochemical properties that impact air quality, climate, and health. The present work shows that the composition of surface layers of atmospherically relevant submicron organic particles can be probed without the use of an external ionization source. Solid dicarboxylic acid particles are used…

  PublisherOA PDFDOI

• Oxidation of solid thin films of neonicotinoid pesticides by gas phase hydroxyl radicals

  Environmental Science Atmospheres · 2022-11-24 · 12 citations

  articleOpen access1st authorCorresponding

  Oxidation of thin films of three solid neonicotinoid pesticides by gas-phase OH radicals yields a variety of products primarily in the surface layers.

  PublisherOA PDFDOI

• Peroxides on the Surface of Organic Aerosol Particles Using Matrix-Assisted Ionization in Vacuum (MAIV) Mass Spectrometry

  Environmental Science & Technology · 2023-09-11 · 10 citations

  articleOpen access

  Organic peroxides are key intermediates in the atmosphere but are challenging to detect, especially in the particle phase, due to their instability, which has led to substantial gaps in the understanding of their environmental effects. We demonstrate that matrix-assisted ionization in vacuum (MAIV) mass spectrometry (MS), which does not require an ionization source, enables in situ characterization of peroxides and other products in the surface layers of organic particles. Hydroxyl radical oxida…

  PublisherDOI

• Gas Phase and Gas–Solid Interface Ozonolysis of Nitrogen Containing Alkenes: Nitroalkenes, Enamines, and Nitroenamines

  The Journal of Physical Chemistry A · 2022-08-04 · 10 citations

  articleOpen accessSenior authorCorresponding

  Emerging contaminants are of concern due to their rapidly increasing numbers and potential ecological and human health effects. In this study, the synergistic effects of the presence of multifunctional nitro, amino and carbon–carbon double bond (C═C) groups on the gas phase ozonolysis in O2 or at the air/solid interface were investigated using five simple model compounds. The gas phase ozonolysis rate constants at 296 K were (3.5 ± 0.9) × 10–20 cm3 molecule–1 s–1 for 2-methyl-1-nitroprop-1-ene a…

  PublisherDOI

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