Collision energy-dependent fragmentation of the fullerene ions C60+ and C70+ using air as target gas

Nishimura, Toshihide; Arakawa, Ryuichi

doi:10.1002/(sici)1096-9888(199903)34:3<175::aid-jms781>3.0.co;2-c

Cited by 4 publications

(4 citation statements)

References 48 publications

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“…13,[20][21][22][23][24][25][26][27] There have been some studies using synchrotron radiation, 28 fast atom bombardments, 29,30 and C 70 ions as projectiles. [31][32][33] However, in order to produce highly charged species close to the ultimate stability limit, short intense laser pulses or highly charged ions are needed as ionizing agents. Jin et al 6 used Bi 44+ ions to multiply ionize a mixture of C 60 and C 70 ; intact fullerenes with charge states up to 9+ and 6+ were observed, respectively.…”

Section: Introductionmentioning

confidence: 99%

Theoretical study of the stability of multiply charged C70 fullerenes

Zettergren

Sánchez‐Sanz

Díaz‐Tendero

et al. 2007

The Journal of Chemical Physics

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We have calculated the electronic energies and optimum geometries of C(70) (q+) and C(68) (q+) fullerenes (q=0-14) by means of density functional theory. The ionization energies for C(70) and C(68) fullerenes increase more or less linearly as functions of charge, consistent with the previously reported behavior for C(60) and C(58) [S. Diaz-Tendero et al., J. Chem. Phys. 123, 184306 (2005)]. The dissociation energies corresponding to the C(70) (q+)-->C(68) (q+)+C(2), C(70) (q+)-->C(68) ((q-1)+)+C(2) (+), C(70) (q+)-->C(68) ((q-2)+)+C(+)+C(+), C(70) (q+)-->C(68) ((q-3)+)+C(2+)+C(+), and C(70) (q+)-->C(68) ((q-4)+)+C(2+)+C(2+) decay channels show that C(70) (q+) (like C(60) (q+)) is thermodynamically unstable for q>or=6. However, the slope of the dissociation energy as a function of charge for a given decay channel is different from that of C(60) (q+) fullerenes. On the basis of these results, we predict q=17 to be the highest charge state for which a fission barrier exists for C(70) (q+).

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Section: Introductionmentioning

confidence: 99%

Theoretical study of the stability of multiply charged C70 fullerenes

Zettergren

Sánchez‐Sanz

Díaz‐Tendero

et al. 2007

The Journal of Chemical Physics

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“…The CID spectra of fullerences, C 60 and C 70 , with target gases of Ar and Xe showed a bimodal type of fragmentation pattern, which was identical with that obtained from a high‐energy EI or photo‐dissociation experiment,10 but their reaction mechanism was not clear. On the other hand, it has become clear recently that the fragment‐ion distribution in the low‐mass region of the bimodal spectrum of fullerene does not result from stepwise evaporation of a C 2 unit but does relate to direct decomposition of the fullerene molecular ion involving a structural phase transition to the Pretzel phase 11, 12…”

Section: Introductionmentioning

confidence: 99%

High-energy collision-induced dissociation of small polycyclic aromatic hydrocarbons

Arakawa

Kobayashi

Nishimura³

2000

J. Mass Spectrom.

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High‐energy collision‐induced dissociation (CID) experiments on polycyclic aromatic hydrocarbons (PAHs) having 2–6 rings, naphthalene, anthracene, phenanthrene, fluoranthene, pyrene and coronene, were performed, and the relative abundances of their fragment ions were investigated as a function of collision energy. The results revealed that the PAHs except naphthalene showed a bimodal‐type distribution of positive fragmentation ions, which is closely similar to the fragment‐ion distribution reported for the CID of three‐dimensional fullerene, C60+ and C70+. The three‐ring isomers of anthracene and phenanthrene and the four‐ring isomers of fluoranthene and pyrene can be distingushable in their spectra under an electron ionization energy of 70 eV, but the high‐energy CID spectra of the three‐ and four‐ring isomers were almost identical. The fragmentation corresponding to fragment ions in the low‐mass region of the bimodal CID spectra could be interpreted by the simple statistical model that fragment ions are formed by random evaporation from the molecular ions after a considerable structural rearrangement, ‘phase transition’, occuring at some high‐energy state. Copyright © 2000 John Wiley & Sons, Ltd.

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“…Both spectra show the ion formation resulting from neutral elimination of hydrocarbons. Two groups of fragmentation patterns were observed, one with low-mass ions C 3 H x C -C 11 H x C and the other with high-mass ions C 12…”

Section: Methodsmentioning

confidence: 99%

“…On the other hand, it has become clear recently that the fragment-ion distribution in the low-mass region of the bimodal spectrum of fullerene does not result from stepwise evaporation of a C 2 unit but does relate to direct decomposition of the fullerene molecular ion involving a structural phase transition to the Pretzel phase. 11,12 It is of interest whether small PAH compounds, such as naphthalene, anthracene, phenanthrene, fluoranthene, pyrene and coronene ( Fig. 1), would exhibit a bimodaltype CID pattern similar to fullerenes that would suggest that the decomposition mechanism is closely related to its structural phase transition.…”

Section: Introductionmentioning

confidence: 99%

High‐energy collision‐induced dissociation of small polycyclic aromatic hydrocarbons

Arakawa¹,

Kobayashi²,

Nishimura³

2000

J. Mass Spectrom.

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High-energy collision-induced dissociation (CID) experiments on polycyclic aromatic hydrocarbons (PAHs)having 2-6 rings, naphthalene, anthracene, phenanthrene, fluoranthene, pyrene and coronene, were performed, and the relative abundances of their fragment ions were investigated as a function of collision energy. The results revealed that the PAHs except naphthalene showed a bimodal-type distribution of positive fragmentation ions, which is closely similar to the fragment-ion distribution reported for the CID of three-dimensional fullerene, C 60 Y and C 70 Y . The three-ring isomers of anthracene and phenanthrene and the four-ring isomers of fluoranthene and pyrene can be distingushable in their spectra under an electron ionization energy of 70 eV, but the high-energy CID spectra of the three-and four-ring isomers were almost identical. The fragmentation corresponding to fragment ions in the low-mass region of the bimodal CID spectra could be interpreted by the simple statistical model that fragment ions are formed by random evaporation from the molecular ions after a considerable structural rearrangement, 'phase transition', occuring at some high-energy state.

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Collision energy-dependent fragmentation of the fullerene ions C60+ and C70+ using air as target gas

Cited by 4 publications

References 48 publications

Theoretical study of the stability of multiply charged C70 fullerenes

Theoretical study of the stability of multiply charged C70 fullerenes

High-energy collision-induced dissociation of small polycyclic aromatic hydrocarbons

High‐energy collision‐induced dissociation of small polycyclic aromatic hydrocarbons

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