Abstract
Using a CO2 laser we have desorbed LiOH and NaOH from a solid target into an expanding inert gas jet pulse. Subsequently the beam was ionized by photons from a UV laser. Surprisingly, we observed in mass spectra metal water clusters and metal-hydride water clusters. For the metals M=Li, Na we find that the [M(H2O)n]+ peaks are dominant for small clusters, while for large clusters (n>20) the [MH(H2O)n]+ peaks are dominant. This indicates that the clathrate (H2O)20 may play an important role in the formation of metallo-water clusters.
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