Regensburg 2025 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 4: Solid-Liquid Interfaces: Structure
O 4.7: Vortrag
Montag, 17. März 2025, 12:00–12:15, H4
Elucidating the interaction of small organic pollutants at ice surfaces with sum-frequency generation spectroscopy — •Gurivi reddy Yettapu1,2, Luca B. Manning2, and Jenee D. Cyran2 — 1University of Duisburg-Essen, Duisburg, Germany — 2Boise State University, Boise, USA
Small organic pollutants interacting with ice and water surfaces in the troposphere are relevant for atmospheric compositional changes.[1] Their interactions with hexagonal basal-plane oriented single crystalline ice have been scarcely revealed.[2] Methanol and acetone are two smallest organic molecules that interact differently with single crystalline ice surfaces. Herein, we probed their direct interaction on ice and water interfaces with surface-specific, mode selective sum-frequency generation spectroscopy. Our results show significant difference in the frequency of H-bonding O-H oscillators of water molecules present at the ice interface.[3] The distinct behavior of the adsorption of these molecules could explain their relevant atmospheric compositions. [1] F. Dominé and P. B. Shepson, Science, 297, 1506-1510 (2002). [2] J. D. Cyran et al., Angew. Chem. Int. Ed., 58, 3620-3624 (2019). [3] G. R. Yettapu et al., Faraday Discussions, just accepted (2024).
Keywords: organic pollutants; adsorption; sum frequency generation spectroscopy; methanol; acetone