Electron localization in negatively charged formamide clusters studied by photodetachment spectroscopy

Maeyama, Toshihiko; Tsukuda, Tatsuya; Yagi, Izumi; Mikami, Naohiko

doi:10.1039/b514656a

Cited by 19 publications

(19 citation statements)

References 32 publications

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“…After 16 ps of transport with a wave the number of surviving OH radicals is 40% larger than that propagated by diffusion. Even if this situation may change over longer times, it is worth noticing that the experimental G-values for OH after ns-µs-times for the largest measured LET are somewhat larger than MC simulation results, which do not include the shock waves [37,38,40]. However, these experiments are only reported for relatively low values of LET and experiments in the Bragg peak region would be much more desirable.…”

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confidence: 96%

Simulation of the ion-induced shock waves effects on the transport of chemically reactive species in ion tracks

et al. 2018

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The passage of energetic ions through tissue initiates a series of physico-chemical events, which lead to biodamage. The study of this scenario using a multiscale approach brought about the theoretical prediction of shock waves initiated by energy deposited within ion tracks. These waves are being explored in this letter in different aspects. The radial dose that sets their initial conditions is calculated using diffusion equations extended to include the effect of energetic δ-electrons. The resulting shock waves are simulated by means of reactive classical molecular dynamics. The simulations predict a characteristic distribution of reactive species which may have a significant contribution to biodamage, and also suggests experimental means to detect the shock waves.

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confidence: 96%

Simulation of the ion-induced shock waves effects on the transport of chemically reactive species in ion tracks

et al. 2018

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“…14,[40][41][42][43] The present study provides an intriguing example of highly specific cluster/microsolvation excited state dynamics for sizeselected pTQ cluster anions. While the frequency-resolved spectra show evidence of monomer-like dynamics for (pTQ) 3 -, strong interaction between the charged monomer and neighbouring neutral monomers leads to new decay channels.…”

Section: Evolution Of Resonance Dynamics With Cluster Sizementioning

confidence: 99%

Dynamics of π*-resonances in anionic clusters of para-toluquinone

Bull

Verlet

2017

Phys. Chem. Chem. Phys.

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The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Frequency-resolved photoelectron spectroscopy applied to mass-selected cluster anions is an insightful approach to characterise the dynamics of π*-resonances with microsolvation. Here, the technique demonstrated with monomer, dimer and trimer radical anions of para-toluquinone (pTQ) over a ~1 eV excitation window above the detachment threshold. The pTQ -spectra show similar resonances and dynamics to para-benzoquinone, a prototype electrophore. The dimer, (pTQ)2 -, has a π-stacked geometry and shows a competition between photodissociation and prompt autodetachment. The trimer, (pTQ)3 -, also has a π-stacked cluster geometry and shows vibrational autodetachment from a non-valence state up to ~0.7 eV above-threshold, outcompeting dissociation. At higher photoexcitation energies, (pTQ)3 -shows monomer-like dynamics, blue-shifted in photoexcitation energy by the cluster cohesion energy. Overall, the study highlights the variety of non-adiabatic dynamics available to π*-resonances and the profound changes that occur through clusterization with one and two monomers.

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“…In contrast, the excess electron is weakly bound by dipolar and/or quadrupolar interaction in smaller clusters. These predictions on solvation of the electron were later examined in a photodetachment study of FA cluster anions and just partly supported [28]. However, electron attachment to FA embedded in helium droplets showed efficient stabilization of weakly bound FA cluster anions [29].…”

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confidence: 77%

Electron ionization of clusters containing the formamide molecule

et al. 2021

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Studies on electron interactions with formamide (FA) clusters promote scientific interest as a model system to understand phenomena relevant to astrophysical, prebiotic, and radiobiological processes. In this work, mass spectrometric detection of cationic species for both small bare and microhydrated formamide clusters was performed at an electron ionization of 70 eV. Furthermore, a comparative analysis of the cluster spectra with the literature-reported gas-phase spectra is presented and discussed, revealing different reaction channels affected by the cluster environment. This study is essential in developing our understanding of both low-energy electron phenomena in clusters that can bridge the complexity gap between gas and realistic systems and the effect of hydration on electron-induced processes.

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Electron localization in negatively charged formamide clusters studied by photodetachment spectroscopy

Cited by 19 publications

References 32 publications

Simulation of the ion-induced shock waves effects on the transport of chemically reactive species in ion tracks

Simulation of the ion-induced shock waves effects on the transport of chemically reactive species in ion tracks

Dynamics of π*-resonances in anionic clusters of para-toluquinone

Electron ionization of clusters containing the formamide molecule

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