Journal
CHEMPHYSCHEM
Volume 14, Issue 1, Pages 227-232Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.201200664
Keywords
clusters; helium; hydrides; ion-molecule reactions; mass spectrometry
Funding
- University of Innsbruck
- Austrian Science Fund, Wien (FWF) [P19073, L633]
- Austrian Science Fund (FWF) [L 633] Funding Source: researchfish
- Austrian Science Fund (FWF) [P19073, L633] Funding Source: Austrian Science Fund (FWF)
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High-resolution mass spectra of helium nanodroplets doped with hydrogen or deuterium reveal that copious amounts of helium can be bound to H+, H2+, H3+, and larger hydrogen-cluster ions. All conceivable HenHx+ stoichiometries are identified if their mass is below the limit of approximate to 120 u set by the resolution of the spectrometer. Anomalies in the ion yields of HenHx+ for x=1, 2, or 3, and n <= 30 reveal particularly stable cluster ions. Our results for HenH1+ are consistent with conclusions drawn from previous experimental and theoretical studies which were limited to smaller cluster ions. The HenH3+ series exhibits a pronounced anomaly at n=12 which was outside the reliable range of earlier experiments. Contrary to findings reported for other diatomic dopant molecules, the monomer ion (i.e. H2+) retains helium with much greater efficiency than hydrogen-cluster ions.
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