Changes in Protonation State of Atmospherically Relevant α-Hydroxyacids at the Air-Water Interface Measured by Surface Tension and IR-RAS.

Burgess E Rugeley, Katherine R Holt, Erica B Peterson, Selma Moulai-Khatir, Claire F N Koltun, Rebecca J Rapf

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Article in The journal of physical chemistry. A, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

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0 citing papers in PubMed.

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5 · Who and what money

Authors and funding

6 authors.

Burgess E RugeleyTrinity University, Department of Chemistry, San Antonio, Texas 78212, United States.

Katherine R HoltTrinity University, Department of Chemistry, San Antonio, Texas 78212, United States.

Erica B PetersonTrinity University, Department of Chemistry, San Antonio, Texas 78212, United States.

Selma Moulai-KhatirTrinity University, Department of Chemistry, San Antonio, Texas 78212, United States.

Claire F N KoltunTrinity University, Department of Chemistry, San Antonio, Texas 78212, United States.

Rebecca J RapfTrinity University, Department of Chemistry, San Antonio, Texas 78212, United States.ORCID 0000-0001-7439-7440

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Characterization of the acid-base behavior and surface protonation state of atmospherically relevant organic acids is of key importance in our understanding of interfacial reactivity, as well as our ability to accurately model aerosol impact on climate. Here we investigate the protonation state of two medium-chain α-hydroxyacids, 2-hydroxyhexanoic acid (HHA) and 2-hydroxyoctanoic acid (HOA), at the air-water interface and in the bulk. The ratio of surface-deprotonated to surface-protonated species at varying pH was examined using surface tension titrations, finding an effective surface-p

Identifiers

PMID40728130

DOI10.1021/acs.jpca.5c02825

PMCPMC12338067

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