scholarly journals A Missing Puzzle in Dissociative Electron Attachment to Biomolecules: The Detection of Radicals

Atoms ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 77
Author(s):  
Sylwia Ptasinska
Keyword(s):  
Gas Phase ◽  
Electron Attachment ◽  
Dissociative Electron Attachment ◽  
Molecular Physics ◽  
Research Perspective ◽  
The Past ◽  
Gas Phase Molecules ◽  
Low Energy Electrons ◽  
Atomic And Molecular Physics ◽  
Radiation Research

Ionizing radiation releases a flood of low-energy electrons that often causes the fragmentation of the molecular species it encounters. Special attention has been paid to the electrons’ contribution to DNA damage via the dissociative electron attachment (DEA) process. Although numerous research groups worldwide have probed these processes in the past, and many significant achievements have been made, some technical challenges have hindered researchers from obtaining a complete picture of DEA. Therefore, this research perspective calls urgently for the implementation of advanced techniques to identify non-charged radicals that form from such a decomposition of gas-phase molecules. Having well-described DEA products offers a promise to benefit society by straddling the boundary between physics, chemistry, and biology, and it brings the tools of atomic and molecular physics to bear on relevant issues of radiation research and medicine.

Dissociation of the FEBID precursor cis-Pt(CO)2Cl2 driven by low-energy electrons

2020 ◽  
Vol 22 (11) ◽  
pp. 6100-6108 ◽  
Author(s):  
Filipe Ferreira da Silva ◽  
Rachel M. Thorman ◽  
Ragnar Bjornsson ◽  
Hang Lu ◽  
Lisa McElwee-White ◽  
...  
Keyword(s):  
Electron Attachment ◽  
Low Energy ◽  
Dissociative Electron Attachment ◽  
Low Energy Electrons ◽  
Theoretical Results

In this study, we present experimental and theoretical results on dissociative electron attachment and dissociative ionisation for the potential FEBID precursor cis-Pt(CO)2Cl2.

scholarly journals Взаимодействие низкоэнергетических электронов с молекулами D-рибозы

2021 ◽  
Vol 129 (12) ◽  
pp. 1471
Author(s):  
И.В. Чернышова ◽  
Е.Э. Контрош ◽  
О.Б. Шпеник
Keyword(s):  
Total Cross Section ◽  
Energy Range ◽  
Cross Section ◽  
Electron Scattering ◽  
Cross Sections ◽  
Electron Attachment ◽  
Low Energy ◽  
Dissociative Electron Attachment ◽  
Low Energy Electrons ◽  
First Time

Abstract– The interactions of low-energy electrons (<20 eV) with D-ribose molecules, namely, electron scattering and dissociative attachment, are studied. The results of these studies showed that the fragmentation of D-ribose molecules occurs effectively even at an electron energy close to zero. as well as in the energy range 5.50–9.50 eV. In the total cross section of electron scattering by molecules, resonance features at energies of 5.00–9.00 eV in the region of formation of ionic fragments C3H4O2–, C2H3O2–, OH–, associated with the destruction of molecular heterocycles, were experimentally discovered for the first time. The correlation of the features observed in the scattering and dissociative electron attachment cross sections is analyzed.

Dissociative electron attachment to gas-phase 5-bromouracil

2000 ◽  
Vol 113 (7) ◽  
pp. 2517-2521 ◽  
Author(s):  
H. Abdoul-Carime ◽  
M. A. Huels ◽  
F. Brüning ◽  
E. Illenberger ◽  
L. Sanche
Keyword(s):  
Gas Phase ◽  
Electron Attachment ◽  
Dissociative Electron Attachment

scholarly journals Interactions of low-energy electrons with the FEBID precursor chromium hexacarbonyl (Cr(CO)6)

2017 ◽  
Vol 8 ◽  
pp. 2583-2590 ◽  
Author(s):  
Jusuf M Khreis ◽  
João Ameixa ◽  
Filipe Ferreira da Silva ◽  
Stephan Denifl
Keyword(s):  
Molecular Beam ◽  
Electron Attachment ◽  
Low Energy ◽  
Collision Induced Dissociation ◽  
Dissociative Electron Attachment ◽  
Low Energy Electrons ◽  
Singly Charged ◽  
Double Focusing ◽  
Doubly Charged ◽  
First Time

Interactions of low-energy electrons with the FEBID precursor Cr(CO)6 have been investigated in a crossed electron–molecular beam setup coupled with a double focusing mass spectrometer with reverse geometry. Dissociative electron attachment leads to the formation of a series of anions by the loss of CO ligand units. The bare chromium anion is formed by electron capture at an electron energy of about 9 eV. Metastable decays of Cr(CO)5 − into Cr(CO)4 −, Cr(CO)4 − into Cr(CO)3 − and Cr(CO)3 − into Cr(CO)2 − are discussed. Electron-induced dissociation at 70 eV impact energy was found to be in agreement with previous studies. A series of Cr(CO) n C+ (0 ≤ n ≤ 3) cations formed by C–O cleavage is described for the first time. The metastable decay of Cr(CO)6 + into Cr(CO)5 + and collision-induced dissociation leading to bare Cr+, are discussed. In addition, doubly charged cations were identified and the ration between doubly and singly charged fragments was determined and compared with previous studies, showing considerable differences.

Dissociative electron attachment to gas phase thiothymine: experimental and theoretical approaches

2014 ◽  
Vol 16 (11) ◽  
pp. 5342-5348 ◽  
Author(s):  
J. Kopyra ◽  
S. Freza ◽  
H. Abdoul-Carime ◽  
M. Marchaj ◽  
P. Skurski
Keyword(s):  
Gas Phase ◽  
Electron Attachment ◽  
Dissociative Electron Attachment ◽  
Theoretical Approaches

Dissociative electron attachment to gas-phase glycine

2003 ◽  
Vol 377 (7-8) ◽  
pp. 1115-1119 ◽  
Author(s):  
S. Ptasinska ◽  
S. Denifl ◽  
A. Abedi ◽  
P. Scheier ◽  
T. D. M�rk
Keyword(s):  
Gas Phase ◽  
Electron Attachment ◽  
Dissociative Electron Attachment
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