Formation of resonances and anionic fragments upon electron attachment to benzaldehyde

Abstract

In the present study, we investigated the formation of negative ions following electron attachment to benzaldehyde in the gas-phase.

Electron-Induced Decomposition of Uracil-5-yl O-(N,N-dimethylsulfamate): Role of Methylation in Molecular Stability

“…The presence of similar resonances below 2 eV suggests that the mentioned anions associated with DEA to SU and OTfU may be formed from the same TNI state of the parent molecule. We note that the presence of a characteristic resonance for O − around 8-9 eV has also been reported in many DEA studies [32][33][34]. In comparison with the literature, Huber et al [35], in their study on hydroxyurea, calculated a similar thermodynamic threshold of 4.57 eV at room temperature (298 K) for the O − formation using the G4(MP2) method.…”

“…In that study, CH3 − was predominantly observed at about 6 eV, while NH − showed a main peak at about 11 eV. Since the experimental data for DMSU were not conclusive, we tried to assign the We note that the presence of a characteristic resonance for O − around 8-9 eV has also been reported in many DEA studies [32][33][34]. In comparison with the literature, Huber et al [35], in their study on hydroxyurea, calculated a similar thermodynamic threshold of 4.57 eV at room temperature (298 K) for the O − formation using the G4(MP2) method.…”

Uracil-5-yl O-Sulfamate: An Illusive Radiosensitizer. Pitfalls in Modeling the Radiosensitizing Derivatives of Nucleobases

“…It was reported that the O – anion is formed at electron energies of 4.4 and 8.3 eV while NH 2 – is observed at 6 eV. Moreover, the recently published work by Ameixa et al 60 on the formation of fragment anions upon electron attachment to benzaldehyde showed the formation of O – via the cleavage of C=O bond in a characteristic resonance between 8 and 9 eV. In our present study, the second resonance position of 8.3 eV is in the same energy range.…”

Negative ion formation and fragmentation upon dissociative electron attachment to the nicotinamide molecule

“…It is also worthy to note that in the previous studies of DEA to benzaldehyde, with the C O group similar to that in NA, O − anion generation was also observed at three higher energy (7.8, 8.9, and 10.5 eV) resonances. 59 The m / z = 16 anion was also measured in the investigations of electron capture by acetamide (CH 3 CONH 2 ). 60 Abdoul-Carime et al assigned the ion with m / z = 16 to O − based on earlier observations, which indicated the lack of formation of the NH 2 − ion from the molecules containing the amide group.…”