Anionic and cationic photodissociation of the chloroform molecule excited in the vicinity of the Cl 1s edge

Lago, A. F.; Cavasso-Filho, R. L.; Souza, G. G. B. de; Santos, A. C. F.; Stolte, Wayne C.; Schlachter, A. S.

doi:10.1016/j.cplett.2012.06.040

Cited by 6 publications

(4 citation statements)

References 28 publications

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“…To illustrate this, in spite of the very good mass resolution of the TOF instrument, striking differences arise when comparing the widths in the peak profiles of PEPICO spectra at 301 eV, in Figure , with the lower energy one, from Figure , and especially with the valence mass spectra in reference Salvi and Castle . Such peak broadening features can be attributed to the substantial increase of the kinetic energy release of the fragments and also due to the effects of Auger decay processes, as also observed in other investigations in the literature …”

Section: Discussion and Resultscontrasting

confidence: 79%

“…Although site selectivity in the dissociation upon core excitation has been reported in the literature in investigations of distinct molecules and at different core edges, our present results do not show any strong evidence of selective fragmentation based on the relative ion yield contributions of the fragments along the C1s edge for the thiazole molecule. This is an interesting result and suggests that the dominant dissociation pathways for this molecule induced by photoionization near the carbon K edge are mainly internal energy driven, which may also be shared with other molecules in its class.…”

Section: Discussion and Resultscontrasting

confidence: 79%

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Photoionization and ionic dissociation of the C₃H₃NS molecule induced by soft X‐ray near the C1s edge

et al. 2017

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Time of flight mass spectrometry, electron-ion coincidence, and ion yield spectroscopy were employed to investigate for the first time the thiazole (C H NS) molecule in the gas phase excited by synchrotron radiation in the soft X-ray domain. Total ion yield (TIY) and photoelectron-photoion coincidence (PEPICO) spectra were recorded as a function of the photon energy in the vicinity of the carbon K edge (C1s). The C1s resonant transitions as well as the core ionization thresholds have been determined from the profile of TIY spectrum, and the features were discussed. The corresponding partial ion yields were determined from the PEPICO spectra for the cation species produced upon the molecular photodissociation. Additional ab initio calculations have also been performed from where relevant structural and electronic configuration parameters were obtained for this molecule.

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Section: Discussion and Resultscontrasting

confidence: 79%

Section: Discussion and Resultscontrasting

confidence: 79%

Photoionization and ionic dissociation of the C₃H₃NS molecule induced by soft X‐ray near the C1s edge

et al. 2017

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“…After emission of one or two electrons following Auger decay, the resulting molecular ions are mostly unstable and dissociate into charged and neutral fragments. Eberhardt and co-workers first observed a site-specific fragmentation upon core excitation. , Selective bond breaking on excitation of inner-shell electrons of a chosen atom has received increasing attention, − in part due to the availability of a third-generation synchrotron light source. − …”

Section: Introductionmentioning

confidence: 99%

Near-Edge X-ray Absorption Fine Structure Spectra and Site-Selective Dissociation of Phenol

Lin

Lee

et al. 2014

J. Phys. Chem. A

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A time-of-flight mass spectrometer with orthogonal acceleration and soft X-rays from synchrotron radiation were utilized to measure near-edge X-ray absorption fine structure (NEXAFS) spectra of carbon and oxygen in phenol and the corresponding ionic fragments following core excitation. The photon energies were in the range of 284-298 eV for the carbon K-edge and 529.5-554.5 eV for the oxygen K-edge. The total ion yield, ion intensity for each ionic fragment, and ion intensity ratio, defined as ion intensity divided by total ion yield, were measured as a function of photon energy. Possible mechanisms of dissociation are proposed and enhancements of specific products of dissociation are reported. In general, the enhancement of these specific products is small in the carbon K-edge region but is clear for some products at the oxygen K-edge. In particular, elimination of the H atom from the hydroxyl group was observed only at the oxygen K-edge. One remarkable result is that an excitation of a core-level electron of oxygen greatly enhanced the cleavage of specific C-C bonds.

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“…At this point it seems in order to point out that the S 2 + cation is also observed in the low photon energy regime 37 as well as under electron induced dissociation of the DMDS molecule. 36 Careful analysis shows that the S 2 + fragment is not subjected to the Doppler splitting observed mainly in the S + fragments, when the two molecules, DMDS and PMDS are excited to their rst excited states (2470.9 eV and 2470.7 eV, respectively). …”

Section: Photostability Of the S 2 + Cationmentioning

confidence: 99%

Breaking the disulfide chemical bond using high energy photons: the dimethyl disulfide and methyl propyl disulfide molecules

et al. 2017

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In order to study the stability of the disulfide chemical bond in molecules subjected to a flux of high energy photons, the ionic fragmentation of two molecules containing a disulfide chemical bond, dimethyl disulfide (DMDS) and methyl propyl disulfide (MPDS), has been studied following excitation around the S 1s edge ($2470 eV). Synchrotron radiation and electron-ion coincidence techniques were used. The core excited states of DMDS and MPDS have also been theoretically investigated at the multiconfigurational self-

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Anionic and cationic photodissociation of the chloroform molecule excited in the vicinity of the Cl 1s edge

Cited by 6 publications

References 28 publications

Photoionization and ionic dissociation of the C₃H₃NS molecule induced by soft X‐ray near the C1s edge

Photoionization and ionic dissociation of the C₃H₃NS molecule induced by soft X‐ray near the C1s edge

Near-Edge X-ray Absorption Fine Structure Spectra and Site-Selective Dissociation of Phenol

Breaking the disulfide chemical bond using high energy photons: the dimethyl disulfide and methyl propyl disulfide molecules

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Anionic and cationic photodissociation of the chloroform molecule excited in the vicinity of the Cl 1s edge

Cited by 6 publications

References 28 publications

Photoionization and ionic dissociation of the C3H3NS molecule induced by soft X‐ray near the C1s edge

Photoionization and ionic dissociation of the C3H3NS molecule induced by soft X‐ray near the C1s edge

Near-Edge X-ray Absorption Fine Structure Spectra and Site-Selective Dissociation of Phenol

Breaking the disulfide chemical bond using high energy photons: the dimethyl disulfide and methyl propyl disulfide molecules

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Photoionization and ionic dissociation of the C₃H₃NS molecule induced by soft X‐ray near the C1s edge

Photoionization and ionic dissociation of the C₃H₃NS molecule induced by soft X‐ray near the C1s edge