Doubly charged CO2 clusters formed by ionization of doped helium nanodroplets

Daxner, Matthias; Denifl, Stephan; Scheier, P.; Echt, Olof

doi:10.1016/j.ijms.2014.01.016

Cited by 9 publications

(6 citation statements)

References 63 publications

(92 reference statements)

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“…ria fermentation, very few gas-phase experimental investigations on this molecule have been reported. [15] Some experimental techniques allow the creationofmultiply ionized molecular species in the gas phase:c ore ionization induced by X-ray absorption, [16] electron impact, [17,18] and highly chargedi on collision. [19] As several charges are present in the system,p henomenas uch as Coulomb explosionc an be observed.…”

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confidence: 99%

Formation and Fragmentation of Protonated Molecules after Ionization of Amino Acid and Lactic Acid Clusters by Collision with Ions in the Gas Phase

et al. 2015

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Collisions between O(3+) ions and neutral clusters of amino acids (alanine, valine and glycine) as well as lactic acid are performed in the gas phase, in order to investigate the effect of ionizing radiation on these biologically relevant molecular systems. All monomers and dimers are found to be predominantly protonated, and ab initio quantum-chemical calculations on model systems indicate that for amino acids, this is due to proton transfer within the clusters after ionization. For lactic acid, which has a lower proton affinity than amino acids, a significant non-negligible amount of the radical cation monomer is observed. New fragment-ion channels observed from clusters, as opposed to isolated molecules, are assigned to the statistical dissociation of protonated molecules formed upon ionization of the clusters. These new dissociation channels exhibit strong delayed fragmentation on the microsecond time scale, especially after multiple ionization.

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Formation and Fragmentation of Protonated Molecules after Ionization of Amino Acid and Lactic Acid Clusters by Collision with Ions in the Gas Phase

et al. 2015

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“…On the other hand, in previous work we observed that the presence of a helium matrix barely reduces the appearance size of doubly charged CO 2 clusters if the conventional approach (electron ionization of doped, neutral HNDs) is adopted. 55 Hence the second factor, sequential ionization, must play a crucial role, as already conjectured in our previous report on doubly charged alkali clusters which were formed by ionization of doped, neutral HNDs. 53 In the present experiments, sequential ionization is guaranteed as seen by the absence of dications when the second ionizer is turned off, see Fig.…”

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confidence: 63%

“…53,54 Similar experiments with CO 2 clusters, on the other hand, did not lead to an appreciable decrease of the appearance size. 55 Here we apply a novel approach to form small multiply charged clusters. Fig.…”

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Size limits and fission channels of doubly charged noble gas clusters

Stromberg,

Bergmeister,

Ganner

et al. 2024

Phys. Chem. Chem. Phys.

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“…In contrast, the formation of doubly charged cluster ions of both polarities, ,,,− as well as of triply charged cesium cluster ions, has been reported in the literature. The critical size, i.e., the smallest observable multiply charged cluster ions X n z + formed in HNDs, is often substantially lower than for X n z + formed upon ionization of pristine neutral clusters, , indicating that the temperature of multiply charged cluster ions strongly affects their stability when approaching the Rayleigh limit.…”

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confidence: 91%

Mixed Cluster Ions of Magnesium and C₆₀

Reider,

Mayerhofer,

Martini

et al. 2024

J. Phys. Chem. A

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Magnesium clusters exhibit a pronounced nonmetalto-metal transition, and the neutral dimer is exceptionally weakly bound. In the present study, we formed pristine Mg n z+ (n = 1−100, z = 1−3) clusters and mixed (C 60 ) m Mg n z+ clusters (m = 1−7, z = 1, 2) upon electron irradiation of neutral helium nanodroplets doped with magnesium or a combination of C 60 and magnesium. The mass spectra obtained for pristine magnesium cluster ions exhibit anomalies, consistent with previous reports in the literature. The anomalies observed for C 60 Mg n + strongly suggest that Mg atoms tend to wet the surface of the single fullerene positioning itself above the center of a pentagonal or hexagonal face, while, for (C 60 ) m Mg n z+ , the preference for Mg to position itself within the dimples formed by fullerene cages becomes apparent. Besides doubly charged cluster ions, with the smallest member Mg 2 2+ , we also observed the formation of triply charged ions Mg n 3+ with n > 24. The ion efficiency curves of singly and multiply charged ions exhibit pronounced differences compared to singly charged ions at higher electron energies. These findings indicate that sequential Penning ionization is essential in the formation of doubly and triply charged ions inside doped helium nanodroplets.

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Doubly charged CO2 clusters formed by ionization of doped helium nanodroplets

Abstract: Graphical abstract

Cited by 9 publications

References 63 publications

Formation and Fragmentation of Protonated Molecules after Ionization of Amino Acid and Lactic Acid Clusters by Collision with Ions in the Gas Phase

Formation and Fragmentation of Protonated Molecules after Ionization of Amino Acid and Lactic Acid Clusters by Collision with Ions in the Gas Phase

Size limits and fission channels of doubly charged noble gas clusters

Mixed Cluster Ions of Magnesium and C₆₀

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Doubly charged CO2 clusters formed by ionization of doped helium nanodroplets

Abstract: Graphical abstract

Cited by 9 publications

References 63 publications

Formation and Fragmentation of Protonated Molecules after Ionization of Amino Acid and Lactic Acid Clusters by Collision with Ions in the Gas Phase

Formation and Fragmentation of Protonated Molecules after Ionization of Amino Acid and Lactic Acid Clusters by Collision with Ions in the Gas Phase

Size limits and fission channels of doubly charged noble gas clusters

Mixed Cluster Ions of Magnesium and C60

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Mixed Cluster Ions of Magnesium and C₆₀