Small gas-phase dianions of Zn3O4 2-, Zn4O5 2-, CuZn2O4 2-, Si2GeO6 2-, Ti2O 5 2- and Ti3O7 2-

Klaus Franzreb, Thomas Sommerfeld, Peter Williams

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We have searched for new species of small oxygen-containing gas-phase dianions produced in a secondary ion mass spectrometer by Cs+ ion bombardment of solid samples with simultaneous exposure of their surfaces to O2 gas. The targets were a pure zinc metal foil, a copper-contaminated zinc-based coin, two silicon-germanium samples (Si 1-xGex (with x = 6.5% or 27%)) and a piece of titanium metal. The novel dianions Zn3O4 2-, Zn 4O5 2-, CuZn2O4 2-, Si2GeO6 2-, Ti2O 5 2- and Ti3O7 2- have been observed at half-integer m/z values in the negative ion mass spectra. The heptamer dianions Zn3O4 2- and Ti 2O5 2- have been unambiguously identified by their isotopic abundances. Their flight times through the mass spectrometer are ∼20 μs and ∼17 μs, respectively. The geometrical structures of the two heptamer dianions Ti2O5 2-, and Zn 3O4 2- are investigated using ab initio methods, and the identified isomers are compared to those of the novel Ge 2O5 2- and the known Si2O 5 2- and Be3O4 2- dianions.

Original languageEnglish (US)
Pages (from-to)846-852
Number of pages7
JournalPhysical Chemistry Chemical Physics
Volume9
Issue number7
DOIs
StatePublished - 2007

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Mass spectrometers
mass spectrometers
Zinc
Gases
vapor phases
Germanium
Silicon
Ion bombardment
zinc
Titanium
Isomers
Metal foil
Copper
flight time
metal foils
Negative ions
Metals
Ions
Oxygen
negative ions

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Atomic and Molecular Physics, and Optics

Cite this

Small gas-phase dianions of Zn3O4 2-, Zn4O5 2-, CuZn2O4 2-, Si2GeO6 2-, Ti2O 5 2- and Ti3O7 2- . / Franzreb, Klaus; Sommerfeld, Thomas; Williams, Peter.

In: Physical Chemistry Chemical Physics, Vol. 9, No. 7, 2007, p. 846-852.

Research output: Contribution to journalArticle

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