Complexes with Atomic Gold Ions: Efficient Bis-Ligand Formation

Complexes with Atomic Gold Ions : Efficient Bis-Ligand Formation

Complexes of atomic gold with a variety of ligands have been formed by passing helium nanodroplets (HNDs) through two pickup cells containing gold vapor and the vapor of another dopant, namely a rare gas, a diatomic molecule (H-2, N-2, O-2, I-2, P-2), or various polyatomic molecules (H2O, CO2, SF6, C6H6, adamantane, imidazole, dicyclopentadiene, and fullerene). The doped HNDs were irradiated by electrons; ensuing cations were identified in a high-resolution mass spectrometer. Anions were detected for benzene, dicyclopentadiene, and fullerene. For most ligands L, the abundance distribution of AuLn+ versus size n displays a remarkable enhancement at n = 2. The propensity towards bis-ligand formation is attributed to the formation of covalent bonds in Au+L2 which adopt a dumbbell structure, L-Au+-L, as previously found for L = Xe and C-60. Another interesting observation is the effect of gold on the degree of ionization-induced intramolecular fragmentation. For most systems gold enhances the fragmentation, i.e., intramolecular fragmentation in AuLn+ is larger than in pure L-n(+). Hydrogen, on the other hand, behaves differently, as intramolecular fragmentation in Au(H-2)(n)(+) is weaker than in pure (H-2)(n)(+) by an order of magnitude.

Gruber, Elisabeth (författare)
Martini, PaulStockholms universitet,Fysikum,Universität Innsbruck, Austria(Swepub:su)pama2814 (författare)
Goulart, Marcelo (författare)
Gatchell, MichaelStockholms universitet,Fysikum,Universität Innsbruck, Austria(Swepub:su)miga8512 (författare)
Rasul, Bilal (författare)
Echt, Olof (författare)
Zappa, Fabio (författare)
Mahmoodi-Darian, Masoomeh (författare)
Scheier, Paul (författare)
Stockholms universitetFysikum (creator_code:org_t)

Av författaren/redakt...: Duensing, Felix; Gruber, Elisabet ...; Martini, Paul; Goulart, Marcelo; Gatchell, Michae ...; Rasul, Bilal; visa fler...; Echt, Olof; Zappa, Fabio; Mahmoodi-Darian, ...; Scheier, Paul; visa färre...

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