Observation of stable HO4+ and DO4+ ions from ion–molecule reactions in helium nanodroplets
Literature Information
Michael Renzler, Stefan Ralser, Lorenz Kranabetter, Erik Barwa, Paul Scheier, Andrew M. Ellis
Ion–molecule reactions between clusters of H2/D2 and O2 in liquid helium nanodroplets were initiated by electron-induced ionization (at 70 eV). Reaction products were detected by mass spectrometry and can be explained by a primary reaction channel involving proton transfer from H3+ or H3+(H2)n clusters and their deuterated equivalents. Very little HO2+ is seen from the reaction of H3+ with O2, which is attributed to an efficient secondary reaction between HO2+ and H2. On the other hand HO4+ is the most abundant product from the reaction of H3+ with oxygen dimer, (O2)2. The experimental data suggest that HO4+ is a particularly stable ion and this is consistent with recent theoretical studies of this ion.
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