State-selected mobilities of atomic cobalt ions

Kemper, Paul R.; Bowers, M. T.

doi:10.1021/ja00164a065

Cited by 47 publications

(27 citation statements)

References 8 publications

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“…It has been generally agreed that linear geometry would be more favorable of anions. For example, Kemper et al have applied their newly developed ionchromatography technique to the studies of carbon cluster cations [15] and anions [16]. They found that pure linear cations could only exist up to C +, while in the case of anions, no rings were observed below C~0; the linear and ring clusters are coexisted between C10 and C2o.…”

Section: Discussionmentioning

confidence: 99%

Studies of cluster anions C n X− (X=N, P, As, Sb, Bi) produced by laser ablation

Huang

Wang

Liu

et al. 1995

Z Phys D - Atoms, Molecules and Clusters

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Abstract.A series of cluster anions C,~X-are produced from laser ablation of appropriate samples, where X is selected as a group-VB element. The recorded mass spectra of these cluster anions display a drastic even/odd alternation on ion intensities: For CnN-, only anions with odd n can be observed; For C~P-and C~As-, cluster anions with even n are produced but with lower signal intensities; For C~Sb-, the signal intensity of clusters does not show even/odd alternation; Finally, for CnBi-, the intensities of cluster anions with even n are higher than those with odd n. This parity effect can be attributed to the linear structure of the cluster anions, and the parity reversal of C~X-from C , N -to C~Bi-can be explained from the electronegativity decreasing of the heteroatom X as it descends in the group. The Hfickel model was applied to account the structural feature of these clusters.

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Section: Discussionmentioning

confidence: 99%

Studies of cluster anions C n X− (X=N, P, As, Sb, Bi) produced by laser ablation

Huang

Wang

Liu

et al. 1995

Z Phys D - Atoms, Molecules and Clusters

View full text Add to dashboard Cite

show abstract

“…A great demand exists for accurate ion mobility measurements for heavier systems, see [78]. In addition, [50,51] have shown that mobilities are quite sensitive to the electron configuration of the ions. They were even able to distinguish between metastable ionic states of the same element by means of ion mobility spectrometry (IMS).…”

Section: Appendix a Mobility In The Low Field Approximationmentioning

confidence: 99%

Prospects for laser spectroscopy, ion chemistry and mobility measurements of superheavy elements in buffer-gas traps

et al. 2015

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“…6 In this method accurate collision cross sections of mass-selected carbon clusters are obtained. These cross sections are then compared to cross sections of model structures, and in almost all cases unambiguous structural confirmation of a given species can be obtained.…”

Section: Introductionmentioning

confidence: 99%

Structures of C_nH_x⁺ Molecules for n ≤ 22 and x ≤ 5: Emergence of PAHs and Effects of Dangling Bonds on Conformation

et al. 1997

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Mixed carbon/hydrogen cationic clusters, C n H x + are generated in a laser desorption ion source over the size range 0 e x e 5 and 5 e n e 22. These species are mass selected and their conformations determined using ion mobility/ion chromatography methods. The conformations of pure carbon cationic species have been previously reported as pure linear chains for n e 6, mixed chains and monocyclic rings for 7 e n e 9, and pure monocyclic rings for n g 10. Addition of a single H atom extends the range of linear species to n ) 15, and addition of two or more H atoms extends the linear isomer to n g 22, primarily at the expense of the fraction of monocyclic ring present. At n ) 15 a new isomer appears for x g 4 and persists to n g 22. Evidence is presented that this isomer is most likely a benzene ring with a carbon loop attached at ortho positions, providing a starting point for polycyclic aromatic hydrocarbon (PAH) formation in carbon/hydrogen plasmas. The fraction of linear isomer for C n H 2 + is ∼1.0 up to n ) 12 and then smoothly decreases relative to the monocyclic isomer until it is nearly gone at n ) 20. This fractional abundance is quantitatively matched by C n -anions over this range of n, indicating H atoms act primarily as electron donors tying up dangling bonds. This analogy indicates C n H + abundances should then reflect C n abundances, quantities that cannot be directly measured experimentally. The C n H + relative linear isomer abundances fall between C n + and C n -(or C n H 2 + ) abundances, declining from 1.0 at n ) 8 to near 0.0 at n ) 16, indicating large linear carbon clusters are almost certainly unstable to ring closure.

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State-selected mobilities of atomic cobalt ions

Cited by 47 publications

References 8 publications

Studies of cluster anions C n X− (X=N, P, As, Sb, Bi) produced by laser ablation

Studies of cluster anions C n X− (X=N, P, As, Sb, Bi) produced by laser ablation

Prospects for laser spectroscopy, ion chemistry and mobility measurements of superheavy elements in buffer-gas traps

Structures of C_nH_x⁺ Molecules for n ≤ 22 and x ≤ 5: Emergence of PAHs and Effects of Dangling Bonds on Conformation

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State-selected mobilities of atomic cobalt ions

Cited by 47 publications

References 8 publications

Studies of cluster anions C n X− (X=N, P, As, Sb, Bi) produced by laser ablation

Studies of cluster anions C n X− (X=N, P, As, Sb, Bi) produced by laser ablation

Prospects for laser spectroscopy, ion chemistry and mobility measurements of superheavy elements in buffer-gas traps

Structures of CnHx+ Molecules for n ≤ 22 and x ≤ 5: Emergence of PAHs and Effects of Dangling Bonds on Conformation

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Structures of C_nH_x⁺ Molecules for n ≤ 22 and x ≤ 5: Emergence of PAHs and Effects of Dangling Bonds on Conformation