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The adsorption of helium atoms on small cationic gold clusters
- Goulart, Marcelo (author)
-
- Gatchell, Michael (author)
- Stockholms universitet,Fysikum,Universität Innsbruck, Austria
- Kranabetter, Lorenz (author)
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- Kuhn, Martin (author)
- Martini, Paul (author)
- Gitzl, Norbert (author)
- Rainer, Manuel (author)
- Postler, Johannes (author)
- Scheier, Paul (author)
- Ellis, Andrew M. (author)
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- (creator_code:org_t)
- 2018
- 2018
- English.
- In: Physical Chemistry, Chemical Physics - PCCP. - : Royal Society of Chemistry (RSC). - 1463-9076 .- 1463-9084. ; 20:14, s. 9554-9560
- Journal article (peer-reviewed)
Abstract
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- Adducts formed between small gold cluster cations and helium atoms are reported for the first time. These binary ions, Aun+Hem, were produced by electron ionization of helium nanodroplets doped with neutral gold clusters and were detected using mass spectrometry. For a given value of n, the distribution of ions as a function of the number of added helium atoms, m, has been recorded. Peaks with anomalously high intensities, corresponding to so-called magic number ions, are identified and interpreted in terms of the geometric structures of the underlying Au-n(+) ions. These features can be accounted for by planar structures for Au-n(+) ions with n <= 7, with the addition of helium having no significant effect on the structures of the underlying gold cluster ions. According to ion mobility studies and some theoretical predictions, a 3-D structure is expected for Au-8(+). However, the findings for Au-8(+) in this work are more consistent with a planar structure.
Subject headings
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
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