Ionization of Anthracene Followed by Fusion in the Solid Phase under Intense Nonresonant Femtosecond Laser Fields

Yatsuhashi, Tomoyuki; Nakashima, Nobuaki

doi:10.1021/jp8082985

Cited by 6 publications

(9 citation statements)

References 62 publications

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“…As a result, we compare the results of studies with isolated (1.4 μm, 130 fs, 2×10 13 -2×10 14 W cm −2 ) [333] and crystalline (1.4 μm, 56 fs, 5×10 12 -2×10 13 W cm −2 ) [334] anthracene exposed to intense femtosecond laser pulses, and anthracene clusters exposed to the energetic projectiles (Xe 20+ , 360 keV) [129]. In the case of isolated anthracene, the triply charged molecular cation is formed with little fragmentation by using a femtosecond laser pulses ( Fig.…”

Section: Carbon Based Materialsmentioning

confidence: 99%

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Multiple ionization and Coulomb explosion of molecules, molecular complexes, clusters and solid surfaces

Yatsuhashi

Nakashima

2018

Journal of Photochemistry and Photobiology C: Photochemistry Re

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Intense femtosecond lasers as well as X-ray free electron lasers provide new means to produce multiply charged molecular cations. The fragmentation processes that these high energy species undergo, termed Coulomb explosion, are utilized to determine the static molecular structures as well as to trace the molecular dynamics of ultrafast chemical reactions. This review focuses on recent advances made in studies of Coulomb explosion imaging, highlighting the use of this process to determine the static structures of complex molecules, geometric isomers, chiral molecules and molecular complexes. Briefly, we summarize the recent time-resolved studies of surface electric fields and the controversy pertaining to the contribution of Coulomb explosion to the mechanism for ablation of solid surfaces.

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Section: Carbon Based Materialsmentioning

confidence: 99%

“…M + , M2 + , and M3 + denote the monomer, dimer, and trimer of molecular ions, respectively. Adapted with permission from Ref [334]…”

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Multiple ionization and Coulomb explosion of molecules, molecular complexes, clusters and solid surfaces

Yatsuhashi

Nakashima

2018

Journal of Photochemistry and Photobiology C: Photochemistry Re

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“…The different PAH growth mechanisms, considered in combustion science, rely on hydrogen abstraction followed by addition of a small hydrocarbon group (acetylene, phenyl, methyl, or vinyl) . Starting from the condensed phase, oligomers of PAH molecules are formed by pyrolysis. , Growth of PAH molecules can also be induced by laser irradiation of suitable solids. , …”

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confidence: 99%

“…6,7 Growth of PAH molecules can also be induced by laser irradiation of suitable solids. 6,8 Small PAH molecules are formed in the gas phase via lowtemperature ion−molecule reactions. 9−11 Polymerization of hydrocarbons induced by electron and photon impact ionization of molecular clusters has also been demonstrated.…”

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Molecular Growth Inside of Polycyclic Aromatic Hydrocarbon Clusters Induced by Ion Collisions

Delaunay

Gatchell

Rousseau

et al. 2015

J. Phys. Chem. Lett.

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The present work combines experimental and theoretical studies of the collision between keV ion projectiles and clusters of pyrene, one of the simplest polycyclic aromatic hydrocarbons (PAHs). Intracluster growth processes induced by ion collisions lead to the formation of a wide range of new molecules with masses larger than that of the pyrene molecule. The efficiency of these processes is found to strongly depend on the mass and velocity of the incoming projectile. Classical molecular dynamics simulations of the entire collision process-from the ion impact (nuclear scattering) to the formation of new molecular species-reproduce the essential features of the measured molecular growth process and also yield estimates of the related absolute cross sections. More elaborate density functional tight binding calculations yield the same growth products as the classical simulations. The present results could be relevant to understand the physical chemistry of the PAH-rich upper atmosphere of Saturn's moon Titan.

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“…Although more than several photons are required for ionization, the efficiency can be improved by using a laser with a high peak power. When the molecular ion has no absorption band in the NIR region, fragmentation can be reduced and a molecular ion can be efficiently observed. − It is reported that a laser with a lower pulse energy and a shorter pulse width is preferential for observing a molecular ion and that a ring-shaped molecule is more stable against a linear molecule and is resistive against the fragmentation. ,,− In addition, a linearly polarized beam has been reported to be more useful to reduce the fragmentation against the circularly polarized beam . However, many types of pesticides have complicated chemical structures, and their ionization mechanisms have not yet been studied in detail.…”

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confidence: 99%

Determination of Pesticides by Gas Chromatography Combined with Mass Spectrometry Using Femtosecond Lasers Emitting at 267, 400, and 800 nm as the Ionization Source

Yang

Imasaka

2018

Anal. Chem.

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A standard sample mixture containing 51 pesticides was separated by gas chromatography (GC), and the constituents were identified by mass spectrometry (MS) using femtosecond lasers emitting at 267, 400, and 800 nm as the ionization source. A two-dimensional display of the GC/MS was successfully used for the determination of these compounds. A molecular ion was observed for 38 of the compounds at 267 nm and for 30 of the compounds at 800 nm, in contrast to 27 among 50 compounds when electron ionization was used. These results suggest that the ultraviolet laser is superior to the near-infrared laser for molecular weight determinations and for a more reliable analysis of these compounds. In order to study the conditions for optimal ionization, the experimental data were examined using the spectral properties (i.e., the excitation and ionization energies and absorption spectra for the neutral and ionized species) obtained by quantum chemical calculations. A few molecules remained unexplained by the currently reported rules, requiring additional rules for developing a full understanding of the femtosecond ionization process. The pesticides in the homogenized matrix obtained from kabosu ( citrus sphaerocarpa) were measured using lasers emitting at 267 and 800 nm. The pesticides were clearly separated and measured on the two-dimensional display, especially for the data measured at 267 nm, suggesting that this technique would have potential for use in the practical trace analysis of the pesticides in the environment.

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Ionization of Anthracene Followed by Fusion in the Solid Phase under Intense Nonresonant Femtosecond Laser Fields

Cited by 6 publications

References 62 publications

Multiple ionization and Coulomb explosion of molecules, molecular complexes, clusters and solid surfaces

Multiple ionization and Coulomb explosion of molecules, molecular complexes, clusters and solid surfaces

Molecular Growth Inside of Polycyclic Aromatic Hydrocarbon Clusters Induced by Ion Collisions

Determination of Pesticides by Gas Chromatography Combined with Mass Spectrometry Using Femtosecond Lasers Emitting at 267, 400, and 800 nm as the Ionization Source

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