Electron attachment and electron ionization of helium droplets containing clusters of C60 and formic acid

Mahmoodi-Darian, Masoomeh; Maalouf, Elias Jabbour Al; Zöttl, Samuel; Scheier, P.; Echt, Olof

doi:10.1016/j.ijms.2020.116293

Cited by 3 publications

(4 citation statements)

References 71 publications

(111 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is a simplified view but ab-initio Hartree-Fock calculations show that the Mulliken charge on a H 2 O molecule remains below 0.05e [259]. The Innsbruck group has reported analogous results for HNDs doped with C 60 or C 70 and H 2 , NH 3 , CH 4 , HCOOH, CH 3 OH or C 2 H 5 OH [219,254,255,260,261].…”

Section: Ion Molecule Reactions Fragmentation Anions Multiply Charged...mentioning

confidence: 96%

Solvation of ions in helium

González‐Lezana

Echt

Gatchell

et al. 2020

International Reviews in Physical Chemistry

Self Cite

View full text Add to dashboard Cite

In recent years several reviews of 4 He nanodroplets (HNDs) have been published in this Journal. The present one focuses on the solvation of atomic, molecular or cluster ions X ± in HNDs. After briefly reviewing the properties of so-called snowballs in bulk helium we discuss experimental conditions for the efficient synthesis of charged, doped HNDs. We show that the cluster ions observed in conventional mass spectrometers originate from fission of highly charged HNDs. Mass spectra of alkali clusters recorded near the ionization threshold of HNDs reveal the size limit beyond which the neutral cluster will be fully embedded in the HND. The abundance distributions of He N X ± ions solvated in helium frequently reveal local anomalies or magic numbers. We demonstrate that the ion abundance is approximately proportional to the dissociation energy D N = E N − E N −1 . A compilation of observed magic numbers will be presented together with theoretical data, including data for ions solvated in molecular hydrogen. Alternative methods to forming He N X + that do not rely on nozzle expansions will be summarized. Electronic excitation spectra of C + 60 and polycyclic aromatic hydrocarbon ions with up to 100 adsorbed helium atoms reveal the properties of the helium adsorption layer in quantitative detail. Next we discuss theoretical efforts to describe the interaction between ions and helium. We close with summarizing the size dependence of physical quantities computed for atomic alkali and alkaline earth cations in helium, such as binding energy, superfluid fraction, structural order, radial density profiles, and the existence of first and higher solvation shells.

show abstract

Section: Ion Molecule Reactions Fragmentation Anions Multiply Charged...mentioning

confidence: 96%

Solvation of ions in helium

González‐Lezana

Echt

Gatchell

et al. 2020

International Reviews in Physical Chemistry

Self Cite

View full text Add to dashboard Cite

show abstract

“…24,25 Furthermore, the behavior and cluster formation of diamondoids in a 3D environment at extremely low temperatures and pressures is also of interest from the perspective of astrochemistry since recent reports confirmed the presence of diamondoid molecules in space and the HND environment can mimic such interstellar conditions. 26,27 Examples of other hydrocarbons and some other small molecules studied in HNDs exist, 3 e.g., methane, 28,29 ethane, 30 haloalkanes, 31,32 ethylene, 33 benzene, 34 fullerene, [35][36][37][38][39][40][41] alcohols and ethers, 42 methanol, 43 triphenylmethanol, 44 formamide, 45 etc. However, none of these molecules are as bulky as diamondoid compounds and consequently cannot engage in numerous intermolecular C-H bond contacts that facilitate a strong LD effect.…”

Section: Introductionmentioning

confidence: 99%

London dispersion dominating diamantane packing in helium nanodroplets

Alić

Messner

Lackner

et al. 2021

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

“…Two recent studies by Mahmoodi-Darian et al investigated the interaction of HNDs doped with FA [389] as well as FA and C 60 with low-energy electrons (Fig. 2.25) [390]. The most abundant anion cluster series in the purely FA-doped droplet experiment was dehydrogenated [FA n -H] -, whereas for cations, protonated [FA n +H] + dominates the mass spectrum.…”

Section: Complexes Of Formic Acidmentioning

confidence: 98%

“…In a follow up study, Mahmoodi-Darian et al utilized EA and EI of large helium droplets co-doped with FA and C 60 to record mass spectra of mixed complexes of FA and C 60 (as well as H 2 O) [390]. Again, the presence of large amounts of water in complexes involving FA can be noticed, however, the relative intensity of C 60 complexed with H 2 O is much lower, which strengthens the interpretation of H 2 O in FA complexes arising mainly from intra-cluster reactions.…”

Section: Complexes Of Formic Acidmentioning

confidence: 99%

Helium Droplet Mass Spectrometry

Schiller

Laimer

Tiefenthaler

2022

Topics in Applied Physics

View full text Add to dashboard Cite

Mass spectrometry is of paramount importance in many studies of pristine and doped helium droplets. Here, we attempt to review the body of work that has been performed in this field. Special focus is given to experiments conducted by the group of Paul Scheier at the University of Innsbruck. We specifically highlight recent studies of highly charged helium droplets and the successive development of pickup into highly charged and mass selected droplets.

show abstract

Electron attachment and electron ionization of helium droplets containing clusters of C60 and formic acid

Cited by 3 publications

References 71 publications

Solvation of ions in helium

Solvation of ions in helium

London dispersion dominating diamantane packing in helium nanodroplets

Helium Droplet Mass Spectrometry

Contact Info

Product

Resources

About