A1 Journal article (refereed)
Experimental Confirmation of a Topological Isomer of the Ubiquitous Au25(SR)18 Cluster in the Gas Phase (2021)


Kalenius, Elina; Malola, Sami; Matus, María Francisca; Kazan, Rania; Bürgi, Thomas; Häkkinen, Hannu (2021). Experimental Confirmation of a Topological Isomer of the Ubiquitous Au25(SR)18 Cluster in the Gas Phase. Journal of the American Chemical Society, 143 (3), 1273-1277. DOI: 10.1021/jacs.0c11509


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Publication details

All authors or editors: Kalenius, Elina; Malola, Sami; Matus, María Francisca; Kazan, Rania; Bürgi, Thomas; Häkkinen, Hannu

Journal or series: Journal of the American Chemical Society

ISSN: 0002-7863

eISSN: 1520-5126

Publication year: 2021

Volume: 143

Issue number: 3

Pages range: 1273-1277

Publisher: American Chemical Society

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1021/jacs.0c11509

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Abstract

High-resolution electrospray ionization ion mobility mass spectrometry has revealed a gas-phase isomer of the ubiquitous, extremely well-studied Au25(SR)18 cluster both in anionic and cationic form. The relative abundance of the isomeric structures can be controlled by in-source activation. The measured collision cross section of the new isomer agrees extremely well with a recent theoretical prediction (Matus, M. F.; et al. Chem. Commun. 2020, 56, 8087) corresponding to a Au25(SR)18– isomer that is energetically close and topologically connected to the known ground-state structure via a simple rotation of the gold core without breaking any Au–S bonds. The results imply that the structural dynamics leading to isomerization of thiolate-protected gold clusters may play an important role in their gas-phase reactions and that isomerization could be controlled by external stimuli.


Keywords: nanoparticles; clusters; isomerism


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Preliminary JUFO rating: 3


Last updated on 2021-19-02 at 16:00