Electron Attachment Processes

Christophorou, L. G.; McCorkle, D.L.; Christodoulides, A. A.

doi:10.1016/b978-0-12-174401-4.50011-0

Cited by 125 publications

(104 citation statements)

References 398 publications

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“…(The normalized target cell current varied < 25% between all three molecules, indicating comparable DEA cross sections.) In a simple picture, higher attachment energy corresponds to a longer lifetime of the temporary molecular anion before the dissociative channel is stabilized against autoionization [18]. Since a longer lifetime could reasonably be expected to give larger chiral sensitivity based on the sampling argument discussed above, this could explain the enhanced 10I asymmetry we observe.…”

Section: Prl 116 093201 (2016) P H Y S I C a L R E V I E W L E T T Ementioning

confidence: 46%

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Anomalously Large Chiral Sensitivity in the Dissociative Electron Attachment of 10-Iodocamphor

Dreiling

Lewis

Mills³

et al. 2016

Phys. Rev. Lett.

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Section: Prl 116 093201 (2016) P H Y S I C a L R E V I E W L E T T Ementioning

confidence: 46%

“…1). The DEA reaction requires that the incident electron form a temporary negative molecular ion that dissociates, unless autodetachment occurs first [18]. The electron density associated with this state is typically localized in the vicinity of the atom(s) that will ultimately form the ionic fragment.…”

mentioning

confidence: 99%

Anomalously Large Chiral Sensitivity in the Dissociative Electron Attachment of 10-Iodocamphor

Dreiling

Lewis

Mills³

et al. 2016

Phys. Rev. Lett.

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“…4,12 As has been summarized in our earlier paper, 11 many DEA spectra of polyatomic molecules follow the same general pattern. They can be divided into a low energy domain, between zero and about B5 eV, and a high energy domain, about 5-14 eV.…”

Section: Introductionmentioning

confidence: 54%

Electron-induced chemistry of alcohols

Ibănescu

May

Monney

et al. 2007

Phys. Chem. Chem. Phys.

104

141

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We studied dissociative electron attachment to a series of compounds with one or two hydroxyl groups. For the monoalcohols we found, apart from the known fragmentations in the 6-12 eV range proceeding via Feshbach resonances, also new weaker processes at lower energies, around 3 eV. They have a steep onset at the dissociation threshold and show a dramatic D/H isotope effect. We assigned them as proceeding via shape resonances with temporary occupation of s * O-H orbitals. These low energy fragmentations become much stronger in the larger molecules and the strongest DEA process in the compounds with two hydroxyl groups, which thus represent an intermediate case between the behavior of small alcohols and the sugar ribose which was discovered to have strong DEA fragmentations near zero electron energy [S. Ptasin´ska, S. Denifl, P. Scheier and T. D. Ma¨rk, J. Chem. Phys., 2004, 120, 8505]. Above 6 eV, in the Feshbach resonance regime, the dominant process is a fast loss of a hydrogen atom from the hydroxyl group. In some cases the resulting (M À 1) À anion (loss of hydrogen atom) is sufficiently energyrich to further dissociate by loss of stable, closed shell molecules like H 2 or ethene. The fast primary process is state-and site selective in several cases, the negative ion states with a hole in the n O orbital losing the OH hydrogen, those with a hole in the s C-H orbitals the alkyl hydrogen.

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“…In making the last-mentioned comparisons, one must bear in mind not only the shift to higher energy typical of the static-exchange approximation but also the lifetime effect that typically causes a resonance maximum in dissociative attachment to appear shifted to lower energy than the corresponding resonance in the elastic scattering cross section. 36 In the simplest picture, we would expect a saturated halocarbon such as c-C 4 F 8 to exhibit a shape resonance associated with the empty valence orbital conjugate to each bonding orbital. This picture is sufficient to explain the number and the symmetry of the low-energy shape resonances in elastic scattering by molecules as large as C 3 F 8 .…”

Section: Resultsmentioning

confidence: 99%

Electron collisions with octafluorocyclobutane, c-C4F8

Winstead¹,

McKoy²

2001

The Journal of Chemical Physics

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Articles you may be interested in Two-dimensional spectra of electron collisions with acrylonitrile and methacrylonitrile reveal nuclear dynamics J. Chem. Phys. 142, 184307 (2015) We present calculated cross sections for elastic and inelastic collisions of low-energy electrons with octafluorocyclobutane, c-C 4 F 8 . The integral elastic cross section displays a rich resonance structure, which we analyze in terms of temporary trapping in virtual valence orbitals. The differential elastic cross sections compare well with recent measurements at energies where the approximations used in the calculations are expected to be valid. Integral and differential cross sections for electron-impact excitation of the lowest singlet and triplet excited states were obtained. We relate the small magnitude of the inelastic integral cross sections and the unusual form of the inelastic differential cross sections to the symmetries of the electronic states involved in the transition.

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Electron Attachment Processes

Cited by 125 publications

References 398 publications

Anomalously Large Chiral Sensitivity in the Dissociative Electron Attachment of 10-Iodocamphor

Anomalously Large Chiral Sensitivity in the Dissociative Electron Attachment of 10-Iodocamphor

Electron-induced chemistry of alcohols

Electron collisions with octafluorocyclobutane, c-C4F8

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