Combined Trapped Ion Mobility and Infrared Ion Spectroscopy Study of Protonation Sites in Aromatic Amines.

Laura Finazzi, Lara van Tetering, Jelle L Schuurman, Jonathan Martens, Giel Berden, Jos Oomens

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Article in Journal of the American Society for Mass Spectrometry, 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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6 authors.

Laura FinazziFELIX Laboratory, Institute for Molecules and Materials, Radboud University Nijmegen, Toernooiveld 7, 6525ED Nijmegen, The Netherlands.ORCID 0009-0009-5675-7890

Lara van TeteringFELIX Laboratory, Institute for Molecules and Materials, Radboud University Nijmegen, Toernooiveld 7, 6525ED Nijmegen, The Netherlands.ORCID 0009-0003-5070-6116

Jelle L SchuurmanFELIX Laboratory, Institute for Molecules and Materials, Radboud University Nijmegen, Toernooiveld 7, 6525ED Nijmegen, The Netherlands.ORCID 0009-0005-0617-9253

Jonathan MartensFELIX Laboratory, Institute for Molecules and Materials, Radboud University Nijmegen, Toernooiveld 7, 6525ED Nijmegen, The Netherlands.ORCID 0000-0001-9537-4117

Giel BerdenFELIX Laboratory, Institute for Molecules and Materials, Radboud University Nijmegen, Toernooiveld 7, 6525ED Nijmegen, The Netherlands.ORCID 0000-0003-1500-922X

Jos OomensFELIX Laboratory, Institute for Molecules and Materials, Radboud University Nijmegen, Toernooiveld 7, 6525ED Nijmegen, The Netherlands.ORCID 0000-0002-2717-1278

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The protonation site of aromatic amines in the gas phase has been under substantial debate, as it involves a subtle competition between the higher electronegativity of the amine nitrogen and the better charge delocalization ability of the fused aromatic rings. Previous studies have unambiguously shown, especially by ion mobility measurements, that higher-energy tautomers are easily observed depending on the experimental conditions in the ion source, including voltage settings and the type of solvent used in spray sources. Here, we use a combination of ion mobility and ion spectroscopy and focus on the tautomeric structure

Indexed as

aminoanthraceneaminonaphthaleneinfrared ion spectroscopyprotonation sitestrapped ion mobility

Identifiers

PMID40841548

DOI10.1021/jasms.5c00164

PMCPMC12412157

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