Gas-Phase Ion Chemistry of the Noble Gases: Recent Advances and Future Perspectives

Grandinetti, Felice

doi:10.1255/ejms.1151

Cited by 72 publications

(65 citation statements)

References 291 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As a result of these closely coincidental values, it is interpreted that the presence of the H−H bond behaves much like it does in the hydrogen molecular cation, but the neon atom affects this motion to a small degree indicating that some bonding is present. The ν2 Ne−H stretch fundamental is substantially lower than most other heavy atom to hydrogen stretches, which are typically in the 3300 to 3600 cm −1 (2.8 − 3.0 micron) region, but the harmonic frequency is many times higher than van der Waals Ne−X stretching frequencies (Grandinetti 2011) indicating that the Ne−H bond itself is also weak but certainly functional. Finally, the bending motion is also lower than it would be in most purely "covalent" structures.…”

Section: Neh2 + Structural and Spectroscopic Considerationsmentioning

confidence: 90%

See 1 more Smart Citation

ArH2+ and NeH2+ as global minima in the Ar+/Ne+ + H2 reactions: energetic, spectroscopic, and structural data

Theis

Morgan

Fortenberry

2014

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

show abstract

Section: Neh2 + Structural and Spectroscopic Considerationsmentioning

confidence: 90%

“…Other noble gas molecules are known (Kim & Lee 1999;Borocci et al 2011;Grandinetti 2011), but the next-simplest class of noble gas compounds are simply the Ng-H2 + species.…”

Section: Searches For the Related Hehmentioning

confidence: 99%

ArH2+ and NeH2+ as global minima in the Ar+/Ne+ + H2 reactions: energetic, spectroscopic, and structural data

Theis

Morgan

Fortenberry

2014

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

show abstract

“…While the reaction of Ar + with ubiquitous hydrogen gas leads to ArH + and hydrogen atoms in the ISM, the analogous re-action with neon will initially lead to neutral neon atoms and ionized hydrogen gas (Theis, Morgan & Fortenberry 2015). More complicated neon structures beyond NeH + have been proposed and even synthesized, but few have bond strengths in the covalent range (Frenking & Cremer 1990;Grandinetti 2011). Notable exceptions include NeOH + and NeCCH + recently characterized theoretically at high level (Theis & Fortenberry 2016;Novak & Fortenberry 2017), but these are several factors less stable than their argon counterparts.…”

Section: Introductionmentioning

confidence: 99%

The interstellar formation and spectra of the noble gas, proton-bound HeHHe+, HeHNe+ and HeHAr+ complexes

Stephan¹,

Fortenberry²

2017

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

The sheer interstellar abundance of helium makes any bound molecules or complexes containing it of potential interest for astrophysical observation. This work utilizes high-level and trusted quantum chemical techniques to predict the rotational, vibrational, and rovibrational traits of HeHHe + , HeHNe + , and HeHAr + . The first two are shown to be strongly bound, while HeHAr + is shown to be more of a van der Waals complex of argonium with a helium atom. In any case, the formation of HeHHe + through reactions of HeH + with HeH 3 + is exothermic. HeHHe + exhibits the quintessentially bright proton-shuttle motion present in all proton-bound complexes in the 7.4 micron range making it a possible target for telescopic observation at the mid-IR/far-IR crossover point and a possible tracer for the as-of-yet unobserved helium hydride cation. Furthermore, a similar mode in HeHNe + can be observed to the blue of this close to 6.9 microns. The brightest mode of HeHAr + is dimmed due the reduced interaction of the helium atom with the central proton, but this fundamental frequency can be found slightly to the red of the Ar−H stretch in the astrophysically detected argonium cation. INTRODUCTIONHelium and hydrogen make up nearly all of the observable matter in the universe leaving chemists to squabble over the remaining scraps. These scraps are what compose the planets, our bodies, and most other things engineered by human beings. Nearly all other processes depend upon atoms much more interesting than the first two on the periodic table. Even so, helium and hydrogen can engage in chemistry with one another almost certainly combining to make HeH + (Hogness & Lunn 1925). This cation should be produced in detectable amounts if for no other reason than the sheer abundance of the constituents in the interstellar medium (ISM) (Roberge & Dalgarno 1982). However, such an interstellar observation of this diatomic cation has yet to be reported in the literature. It was the analogous ArH + that has been observed toward various astronomical sources (Barlow et al. 2013;Schilke et al. 2014;Roueff, Alekseyev & Bourlot 2014;Neufeld & Wolfire 2016) making the argonium and not helonium (helium hydride) cation the first noble gas molecule detected in nature. The smaller and more abundant helium and even neon hydride cations have not been observed, yet.The chemistry of helium is likely the least voluminous for any of the elements between hydrogen and iron even in controlled laboratory conditions. However, helium will make complexes and form some bonds. Helium cationic clusters have been predicted, HemHn + clusters have been synthesized, dication complexes observed, and even hydrogen-like replacement structures analyzed (Frenking & Cremer 1990;Roth, Dopfer & Maier 2001;Grandinetti 2004;Savic et al. 2015;Zicler et al. 2016). In all cases, the issue is that the helium cation binding in any of these complexes is relatively weak making long-lifetime molecules and high enough abundances for observable interstellar spectra of such chemical co...

show abstract

“…Recent attempts to synthesize compounds that contain noble gases have been remarkably successful 1–3. However, so far no stable compound containing helium has been synthesized, except for structures where helium atoms are physically trapped inside fullerene cages 4.…”

Section: Introductionmentioning

confidence: 99%

Cationic Complexes of Hydrogen with Helium

et al. 2012

View full text Add to dashboard Cite

High-resolution mass spectra of helium nanodroplets doped with hydrogen or deuterium reveal that copious amounts of helium can be bound to H+, H2+, H3+, and larger hydrogen-cluster ions. All conceivable HenHx+ stoichiometries are identified if their mass is below the limit of ≍120 u set by the resolution of the spectrometer. Anomalies in the ion yields of HenHx+ for x=1, 2, or 3, and n≤30 reveal particularly stable cluster ions. Our results for HenH1+ are consistent with conclusions drawn from previous experimental and theoretical studies which were limited to smaller cluster ions. The HenH3+ series exhibits a pronounced anomaly at n=12 which was outside the reliable range of earlier experiments. Contrary to findings reported for other diatomic dopant molecules, the monomer ion (i.e. H2+) retains helium with much greater efficiency than hydrogen-cluster ions.

show abstract

Gas-Phase Ion Chemistry of the Noble Gases: Recent Advances and Future Perspectives

Cited by 72 publications

References 291 publications

ArH2+ and NeH2+ as global minima in the Ar+/Ne+ + H2 reactions: energetic, spectroscopic, and structural data

ArH2+ and NeH2+ as global minima in the Ar+/Ne+ + H2 reactions: energetic, spectroscopic, and structural data

The interstellar formation and spectra of the noble gas, proton-bound HeHHe+, HeHNe+ and HeHAr+ complexes

Cationic Complexes of Hydrogen with Helium

Contact Info

Product

Resources

About