Dissociative electron attachment to formic acid (HCOOH)

Pełc, Andrzej; Sailer, W.; Scheier, P.; Probst, Michael; Mason, Nigel J.; Illenberger, Eugen; Märk, T.D.

doi:10.1016/s0009-2614(02)00925-9

Cited by 93 publications

(78 citation statements)

References 29 publications

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“…Pelc and co-workers 24,25 report a peak value of ͑1.7± 0.6͒ ϫ 10 −18 cm 2 , while Prabhudesai et al 26 find 1.4 ϫ 10 −18 cm 2 . These values are roughly 50% larger than that of tryptophan and a factor of 5 larger than that of proline, the smallest cross section of the amino acids studied.…”

Section: Dea Cross Section Magnitudesmentioning

confidence: 96%

“…22 A similar feature appears in HCOOH. [23][24][25][26][27] In each case, mass analysis indicates that the fragment is ͓M-H͔ − , the parent molecular anion minus a H atom. The measurements with high energy resolution suggest that this feature displays a near vertical onset, indicating that the threshold for this DEA process lies just below the peak energy.…”

Section: Amino Acidsmentioning

confidence: 99%

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Total dissociative electron attachment cross sections of selected amino acids

Scheer

Możejko

Gallup

et al. 2007

The Journal of Chemical Physics

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Total dissociative electron attachment cross sections are presented for the amino acids, glycine, alanine, proline, phenylalanine, and tryptophan, at energies below the first ionization energy. Cross section magnitudes were determined by observation of positive ion production and normalization to ionization cross sections calculated using the binary-encounter-Bethe method. The prominent 1.2 eV feature in the cross sections of the amino acids and the closely related HCOOH molecule is widely attributed to the attachment into the -COOH * orbital. The authors discuss evidence that direct attachment to the lowest * orbital may instead be responsible. A close correlation between the energies of the core-excited anion states of glycine, alanine, and proline and the ionization energies of the neutral molecules is found. A prominent feature in the total dissociative electron attachment cross section of these compounds is absent in previous studies using mass analysis, suggesting that the missing fragment is energetic H − .

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Section: Dea Cross Section Magnitudesmentioning

confidence: 96%

Section: Amino Acidsmentioning

confidence: 99%

Total dissociative electron attachment cross sections of selected amino acids

Scheer

Możejko

Gallup

et al. 2007

The Journal of Chemical Physics

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“…Therefore, if an O 1s electron is excited, HCOOH dissociate into smaller or atomic fragments. Pelc et al (2002) showed, from theoretical calculations, that it is not possible by the thermodynamical point of view to bind an extra electron to HCOOH, because it has a negative adiabatic electron affinity. In contrast to comparable gas-phase studies, CH 3 OH + was not detected in the methanol positive mass spectra.…”

Section: Photo Stimulation Ion Desorptionmentioning

confidence: 99%

Employing Soft X-Rays in Experimental Astrochemistry

Pilling¹,

Andrade²

2012

X-Ray Spectroscopy

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“…Interaction of low-energy electrons with DNA nucleobases (thymine, adenine, cytosine, and guanine), organic acids, and amino acids is of great significance for the description of the molecular mechanisms in radiation damage [1][2][3][4][5][6][7][8]. When high-energy radiation interacts with a biological medium, it produces free radicals and low-energy electrons.…”

Section: Introductionmentioning

confidence: 99%

“…From gas phase experiments, it was found that all the nucleobases [1][2][3][4], organic acids [5] and also amino acids [6][7][8] exhibit a hydrogen loss due to low-energy electrons. In biological environment, the anion (M−H) − can initiate further reactions leading to the cell damage.…”

Section: Introductionmentioning

confidence: 99%

Theory of dissociative electron attachment: Biomolecules and clusters

Fabrikant

2015

EPJ Web of Conferences

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Abstract. Very broad* resonances, which are responsible for threshold structures and dissociative attachment in electron collisions with hydrogen halides, are also important in electron-impact bond-breaking in nucleobases and amino acids. We investigate this mechanism in more detail by carrying out model calculations of the N-H bond breaking in the uracil molecule. Although the * resonance is extremely broad at the equilibrium nuclear geometry, it is stabilized fast when the N-H bond is stretched, and this produces a substantial dissociative attachment cross section. In addition, very pronounced vibrational Feshbach resonances are seen below vibrational excitation thresholds. To incorporate the effect of a cluster environment in the dissociative electron attachment process, we develop further the multiple scattering theory for this process and calculate the dissociative attachment cross section for the CF 3 Cl molecule embedded in the (H 2 O) 6 cluster.

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Dissociative electron attachment to formic acid (HCOOH)

Cited by 93 publications

References 29 publications

Total dissociative electron attachment cross sections of selected amino acids

Total dissociative electron attachment cross sections of selected amino acids

Employing Soft X-Rays in Experimental Astrochemistry

Theory of dissociative electron attachment: Biomolecules and clusters

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