Freiburg 2024 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 4: Poster
MS 4.8: Poster
Dienstag, 12. März 2024, 17:00–19:00, Aula Foyer
Photodissociation of mono-, di, and trianionic tin clusters — •Moritz Grunwald-Delitz, Paul Fischer, Alexander Jankowski, and Lutz Schweikhard — Inst. of Physics, Univ. of Greifswald, 17487 Greifswald
(Poly-)anionic tin clusters (Snnz− of sizes n<70 with charge states z=1,2,3) were studied at the ClusterTrap setup [F. Martinez et al., IJMS 266 (2014) 365] with regard to their fragmentation patterns upon photoexcitation. While monoanionic tin clusters have shown a shift in their fragmentation behavior from break-off of neutral Sn7 and Sn10 clusters (for n<45) to sequential monomer evaporation (for n>45) [M. Wolfram et.al., EPJD 74 (2020) 135], the investigations have now been extended to larger clusters, also including charge state z=3. To this end, the tin cluster ensemble, produced by laser ablation, is stored in a Penning trap. After isolation of a single mono-anionic cluster species, it is exposed to an electron bath for electron attachment, i.e. the population of higher charge states [S. König et. al., EPJD 72 (2018) 153]. The separated cluster species is then irradiated with a nanosecond-laser pulse, resulting in delayed photodissociation. Break-off of neutral Sn3, Sn5 and Sn9 is observed for all three charge states. In addition, the trianionic cluster shows fission into Snn−102− + Sn10− in analogy to the decay of dianions, where Sn10− is also identified as a fission product.
Keywords: Penning traps; metal clusters; photodissociation