Electron affinity and dissociative electron attachment in saturated dialkyl group-16 derivatives

Modelli, Alberto; Jones, Derek; Distefano, Giuseppe; Tronc, M.

doi:10.1016/0009-2614(91)80085-c

Cited by 41 publications

(64 citation statements)

References 29 publications

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“…The intensity of this fragment is very low, i.e., the maximum count rate of CH 3 SS − is more than two orders of magnitude lower than that of CH 2 S − . The position of the peak, with a maximum at 0.9 eV, matches well the position of the respective fragment from the previous experiment by Modelli et al [25]. This is also true for the relative intensity between the CH 3 SS − and CH 2 S − fragments (see Tab.…”

Section: Resultssupporting

confidence: 89%

“…3). The CH − 3 anion, although not detected from a previous DEA experiments on gas phase CH 3 SSCH 3 [25,29], has been recorded from electrons impact on CH 3 SCH 3 condensed on D 2 O films as a predominant species [30]. The anionic fragment is most likely generated via a core excited resonance with some contribution from a high lying shape resonance.…”

Section: Resultsmentioning

confidence: 86%

“…1 in Ref. [25]). Another, light fragment detected at m/z 32 can be attributed to the formation of S − .…”

Section: Resultsmentioning

confidence: 91%

“…The peaks in the high energy range can be easily attributed to core excited resonances (valence or Rydberg states) by comparison of their maxima with the high resolution VUV photo-absorption spectra [26]. The origin of the low energy peak is not obvious since, from electron transmission spectroscopy (ETS), the lowest shape resonance of σ SC * character has been observed at 3.25 eV [25] and theory predicts the resonance of B 2 symmetry at 2.6 eV [27].…”

Section: Resultsmentioning

confidence: 99%

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Electron driven processes in sulphur containing compounds CH3SCH3 and CH3SSCH3

Kopyra

Władziński

2015

Eur. Phys. J. D

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Abstract. Dissociative electron attachment to gas phase dimethyl sulphide (CH3SCH3) and dimethyl disulphide (CH3SSCH3) has been studied by means of a crossed beams apparatus. Cleavage of the C-S bond within CH3SCH3 and the S-S bond within CH3SSCH3 is observed within a resonance in the energy range below 2 eV and visible preferentially via the appearance of the fragment CH2S− . The striking finding is that the intensity of CH2S − generated from CH3SSCH3 is more than two orders of magnitude higher than the intensity of the respective anionic fragment generated from CH3SCH3. Our results clearly demonstrate that the CH3SSCH3 molecule, which contains disulphide bridge is substantially more sensitive towards electron attachment resulting mainly in dissociation along the S-S bridge.

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 86%

“…1 in Ref. [25]). Another, light fragment detected at m/z 32 can be attributed to the formation of S − .…”

Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 99%

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Electron driven processes in sulphur containing compounds CH3SCH3 and CH3SSCH3

Kopyra

Władziński

2015

Eur. Phys. J. D

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“…The antibonding character of the s* (S-S) has been demonstrated by electron transmission spectroscopy (ETS) and dissociative electron attachment spectroscopy (DEAS). 32 The accepted experimental S 1s ionization potential in DMDS is 2477.5 eV, as previously determined by Sodhi et al 33 and corrected by Carroll et al 34 This is also in very good agreement with our theoretical results.…”

Section: Excitation and Fragmentation Of The Dmds Moleculesupporting

confidence: 82%

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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Low‐energy (0.1 eV) electron attachment SS bond cleavage assisted by Coulomb stabilization

Sawicka

Berdys-Kochanska

Skurski

et al. 2005

Int J of Quantum Chemistry

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Electron capture by the ion H 3 C-S-S-CH 2 -CH 2 -NH 3ϩ at either the ϪNH 3 ϩ site (to form the Rydberg radical H 3 C-S-S-CH 2 -CH 2 -NH 3 ) or into the S-S antibonding * orbital is shown to be able to produce the same S-S bond fragmentation products H 3 C-S and HS-CH 2 -CH 2 -NH 2 , albeit by very different pathways. Capture into the S-S * orbital is, in the absence of the nearby positive site, endothermic by approximately 0.9 eV and leads to an electronically metastable anion that can undergo dissociation or autodetachment. In contrast, in the presence of the stabilizing Coulomb potential provided by the nearby NH 3 ϩ site, electron attachment into the S-S * orbital is rendered exothermic. As a result, as we have shown in this paper, the effective cross sections for forming the H 3 C-S and HS-CH 2 -CH 2 -NH 2 products via attachment at the ϪNH 3 ϩ and S-S * sites are predicted to be comparable for our model compound. Moreover, we predict that the * site will become more amenable to electron attachment compared with the ϪNH 3 ϩ site for compounds in which the distance between the S-S bond and the protonated amine is larger than in our cation. These findings and insights should be of substantial value to workers studying bond cleavage rates and fragmentation patterns in gaseous positively charged samples of peptides and proteins.

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Electron affinity and dissociative electron attachment in saturated dialkyl group-16 derivatives

Cited by 41 publications

References 29 publications

Electron driven processes in sulphur containing compounds CH3SCH3 and CH3SSCH3

Electron driven processes in sulphur containing compounds CH3SCH3 and CH3SSCH3

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

Low‐energy (0.1 eV) electron attachment SS bond cleavage assisted by Coulomb stabilization

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