A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Ion–Molecule Rate Constants for Reactions of Sulfuric Acid with Acetate and Nitrate Ions (2022)

Fomete, S. K. W., Johnson, J. S., Myllys, N., Neefjes, I., Reischl, B., & Jen, C. N. (2022). Ion–Molecule Rate Constants for Reactions of Sulfuric Acid with Acetate and Nitrate Ions. Journal of Physical Chemistry A, 126(44), 8240-8248. https://doi.org/10.1021/acs.jpca.2c02072

JYU-tekijät tai -toimittajat

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Fomete, Sandra K. W.; Johnson, Jack S.; Myllys, Nanna; Neefjes, Ivo; Reischl, Bernhard; Jen, Coty N.

Lehti tai sarja: Journal of Physical Chemistry A

ISSN: 1089-5639

eISSN: 1520-5215

Julkaisuvuosi: 2022

Ilmestymispäivä: 26.10.2022

Volyymi: 126

Lehden numero: 44

Artikkelin sivunumerot: 8240-8248

Kustantaja: American Chemical Society (ACS)

Julkaisumaa: Yhdysvallat (USA)

Julkaisun kieli: englanti

DOI: https://doi.org/10.1021/acs.jpca.2c02072

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/83758

Tiivistelmä

Atmospheric nucleation from precursor gases is a significant source of cloud condensation nuclei in the troposphere and thus can affect the Earth’s radiative balance. Sulfuric acid, ammonia, and amines have been identified as key nucleation precursors in the atmosphere. Studies have also shown that atmospheric ions can react with sulfuric acid to form stable clusters in a process referred to as ion-induced nucleation (IIN). IIN follows similar reaction pathways as chemical ionization, which is used to detect and measure nucleation precursors via atmospheric pressure chemical ionization mass spectrometers. The rate at which ions form clusters depends on the ion–molecule rate constant. However, the rate constant varies based on the ion composition, which is often not known in the atmosphere. Previous studies have examined ion–molecule rate constants for sulfuric acid and nitrate ions but not for other atmospherically relevant ions like acetate. We report the relative rate constants of ion–molecule reactions between nitrate and acetate ions reacting with sulfuric acid. The ion–molecule rate constant for acetate and sulfuric acid is estimated to be a factor of 1.9–2.4 times higher than that of the known rate constant for nitrate and sulfuric acid. Using quantum chemistry, we find that acetate has a higher dipole moment and polarizability than nitrate. This may contribute to an increase in the collision cross-sectional area between acetate and sulfuric acid and lead to a greater reaction rate constant than nitrate. The ion–molecule rate constant for acetate with sulfuric acid will help quantify the contribution of acetate ions to atmospheric ion-induced new particle formation.

YSO-asiasanat: anionit; ionit; orgaaniset yhdisteet

Vapaat asiasanat: anions; ions; kinetic parameters; organic compounds; sulfuric acid

Liittyvät organisaatiot

OKM-raportointi: Kyllä

VIRTA-lähetysvuosi: 2022

JUFO-taso: 1