Low temperature fast atom bombardment mass spectra of HCl water solution

Boryak, Oleg A.; Kosevich, M. V.; Stepanov, I. O.; Shelkovsky, Vadim S.

doi:10.1016/s1387-3806(99)00128-1

Cited by 7 publications

(9 citation statements)

References 28 publications

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“…8 Studies of water cluster ions in the gas phase have used molecular beams with electron beam and photon induced ionization; laser desorption with photon ionization and sputtering in SIMS and fast atom bombardment (FAB). [9][10][11][12][13][14][15] From both experimental and theoretical studies, much is known about the structure and energetics of the water clusters (H 2 O) n-1 H + emitted. There are magic numbers of especially stable ions at n ) 4, 21, and others have been reported at 24, 26, 28, and 30.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of Secondary Ion Emission from Water Ice under Ion Bombardment by Au⁺, Au₃⁺, and C₆₀⁺

et al. 2009

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Secondary ion emission from water ice has been studied using Au+, Au3 +, and C60 + primary ions. In contrast to the gas phase in which the spectra are dominated by the (H2O) n H+ series of ions, the spectra from ice using all three primary ions are principally composed of two series of cluster ions (H2O) n H+ and (H2O) n +. Dependent on the conditions, the unprotonated series can dominate the spectra. Since in the gas phase (H2O) n + is unstable with respect to the formation of the protonated ion series, the presence of the solid must provide a means to stabilize their formation. The cluster ion yields under Au+ bombardment are very low and can be understood in terms of sputtering on the borderline between linear cascade and thermal spike behavior. There is a 104 increase in yield across the whole spectrum compared to Au+ when Au3 + and C60 + species are used as primary ions. The character of the spectra differed between these two primary ions, but insights into the mechanism of secondary ion emission for both is discussed within an energy deposition framework provided by the fluid flow-based mesoscale energy deposition footprint (MEDF) model that predicts a cone-shaped zone of activation and emission. C60 + differs from Au3 + in that it delivers its energy closer to the surface, and it is argued this has consequences for the cluster ion distribution and yield. Increasing the ion dose by sputtering suppresses the yield of (H2O) n + and increases the yield of the protonated ions in the small cluster region, whereas the yield in the large cluster regime is suppressed significantly. The three primary ions show rather different behavior, and this is discussed in the light of the sputtering models. Finally, negative ion spectra including cluster ions have been observed for the first time. C60 + delivers the highest yields, but these are less than 10 times the positive ion yields, probably because the O and OH fragment ions on which the clusters are based are easily neutralized by protons.

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Section: Introductionmentioning

confidence: 99%

A Comparative Study of Secondary Ion Emission from Water Ice under Ion Bombardment by Au⁺, Au₃⁺, and C₆₀⁺

et al. 2009

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“…There is some debate about the mobility of the species. According to Molina, 6 the diffusivity of HCl is + moiety in the trihydrate of hydrogen chloride, as revealed by X-ray scattering, can be considered as preformed clusters, 38 which increase the intensity of the proton clusters.…”

Section: Surface Chemical Reactions Studied By Fab-msmentioning

confidence: 99%

Fast-Atom Bombardment Mass Spectrometry in Heterogeneous Atmospheric Chemistry

Прончев

Korobeinikova

Yermakov

2002

Eur J Mass Spectrom (Chichester)

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The application of fast-atom bombardment (FAB) mass spectrometry to solving the problems of heterogeneous atmospheric chemistry is briefly reviewed. The method is useful in studying the state of surfaces and molecules adsorbed thereon and looks appropriate in investigations of the dynamics and mechanisms of chemical reactions occurring both on a surface and in a volume of moving particulate matter suspended in a gas. It was shown that composition of atmospheric aerosols and components dissolved in atmospheric water (clouds, fogs, mists etc.) can be determined by the FAB technique. The given method, as was found in our investigations, allows the discrimination of ferrous and ferric ions. Detection limits for concentrations of H2SO4 and Fe(II / III) ions as essential components of atmospheric water determined in model experiments are established at the level of 10−6 M.

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“…They were recorded, however, for the crystalline hydrates of HCl. 9 Hence a possibility of production of water clusters depends on the type of crystalline hydrate.…”

Section: Neat Water Clustersmentioning

confidence: 99%

“…1,7,43 It was suggested that this effect may be connected with the presence of a mixed type of both ionic and H-bond interactions in the crystalline hydrates in contrast to purely ionic (in anhydrous salts) or H-bond (in ice and organic crystals) hydrates, which can facilitate substance dispersion under particle bombardment. 7,9 It is known that both neutral and charged particles are sputtered under FAB/SIMS conditions, and an increase in some way of 'ionization' via protonation can shift the balance in favor of the charged species. In contrast to water ice with a continuous H-bond network, the 'preformed' ionic species exist within the crystalline lattice of the crystalline hydrates.…”

Section: Neat Water Clustersmentioning

confidence: 99%

“…7 -9 Since one of the important parameters of water solution is its pH value, one of the steps of our research was connected with the study of acids and acidic solutions under LT FAB conditions. 8,9 In this paper, results on frozen water solutions of nitric acid are reported. The study of nitric acid is of interest not only for fundamental inorganic chemistry, but also for applied atmospheric and ecological research, as ice grains which contain HNO 3 have been discovered in the atmosphere in polar stratospheric clouds.…”

Section: Introductionmentioning

confidence: 98%

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Low-temperature fast atom bombardment mass spectra of frozen nitric acid-water solution

et al. 1999

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Low temperature fast atom bombardment mass spectra of HCl water solution

Cited by 7 publications

References 28 publications

A Comparative Study of Secondary Ion Emission from Water Ice under Ion Bombardment by Au⁺, Au₃⁺, and C₆₀⁺

A Comparative Study of Secondary Ion Emission from Water Ice under Ion Bombardment by Au⁺, Au₃⁺, and C₆₀⁺

Fast-Atom Bombardment Mass Spectrometry in Heterogeneous Atmospheric Chemistry

Low-temperature fast atom bombardment mass spectra of frozen nitric acid-water solution

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Low temperature fast atom bombardment mass spectra of HCl water solution

Cited by 7 publications

References 28 publications

A Comparative Study of Secondary Ion Emission from Water Ice under Ion Bombardment by Au+, Au3+, and C60+

A Comparative Study of Secondary Ion Emission from Water Ice under Ion Bombardment by Au+, Au3+, and C60+

Fast-Atom Bombardment Mass Spectrometry in Heterogeneous Atmospheric Chemistry

Low-temperature fast atom bombardment mass spectra of frozen nitric acid-water solution

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A Comparative Study of Secondary Ion Emission from Water Ice under Ion Bombardment by Au⁺, Au₃⁺, and C₆₀⁺

A Comparative Study of Secondary Ion Emission from Water Ice under Ion Bombardment by Au⁺, Au₃⁺, and C₆₀⁺