Ultraviolet and Infrared Spectra of Electron-Bombarded Solid Nitrogen and Methane Diluted in Solid Nitrogen

Wu, Yu-Jong; Chen, Hui-Fen; Chuang, Shiang-Jiun; Huang, Tzu-Ping

doi:10.1088/0004-637x/768/1/83

Cited by 33 publications

(14 citation statements)

References 40 publications

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“…For example, the use of simple ice analogs has provided significant insight into the identity of many small molecules produced by the radiation processing of ices relevant to TNOs (Bohn et al 1994;Moore & Hudson 2003;Hodyss et al 2011;Kim & Kaiser 2012;Wu et al 2012Wu et al , 2013. Additionally, some work has already been done to study the refractory residues using infrared spectroscopy of similar ices subjected to ion bombardment (Strazzulla et al 2001;Palumbo et al 2004).…”

Section: Introductionmentioning

confidence: 99%

ICE CHEMISTRY ON OUTER SOLAR SYSTEM BODIES: ELECTRON RADIOLYSIS OF N₂-, CH₄-, AND CO-CONTAINING ICES

Materese

Cruikshank

Sandford

et al. 2015

ApJ

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Radiation processing of the surface ices of outer Solar System bodies may be an important process for the production of complex chemical species. The refractory materials resulting from radiation processing of known ices are thought to impart to them a red or brown color, as perceived in the visible spectral region. In this work, we analyzed the refractory materials produced from the 1.2-keV electron bombardment of low-temperature N 2 -, CH 4 -, and CO-containing ices (100:1:1), which simulates the radiation from the secondary electrons produced by cosmic ray bombardment of the surface ices of Pluto. Despite starting with extremely simple ices dominated by N 2 , electron irradiation processing results in the production of refractory material with complex oxygen-and nitrogenbearing organic molecules. These refractory materials were studied at room temperature using multiple analytical techniques including Fourier-transform infrared spectroscopy, X-ray absorption near-edge structure (XANES) spectroscopy, and gas chromatography coupled with mass spectrometry (GC-MS). Infrared spectra of the refractory material suggest the presence of alcohols, carboxylic acids, ketones, aldehydes, amines, and nitriles. XANES spectra of the material indicate the presence of carboxyl groups, amides, urea, and nitriles, and are thus consistent with the IR data. Atomic abundance ratios for the bulk composition of these residues from XANES analysis show that the organic residues are extremely N-rich, having ratios of N/C ∼ 0.9 and O/C ∼ 0.2. Finally, GC-MS data reveal that the residues contain urea as well as numerous carboxylic acids, some of which are of interest for prebiotic and biological chemistries.

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Section: Introductionmentioning

confidence: 99%

ICE CHEMISTRY ON OUTER SOLAR SYSTEM BODIES: ELECTRON RADIOLYSIS OF N₂-, CH₄-, AND CO-CONTAINING ICES

Materese

Cruikshank

Sandford

et al. 2015

ApJ

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“…The same centers were suggested to contribute to the novel phenomenon -anomalous low-temperature postdesorption ALTpD observed upon controlled heating of a preliminary irradiated solid N 2 [23]. Creation of ionic species N 3 + in electron-bombarded solid N 2 was reported recently [24].…”

mentioning

confidence: 75%

“…Ionic center N 4 + dissociates into molecules by the reaction (2). As it was mentioned N 3 + centres are generated in solid nitrogen under electron bombardment [24]. The dissociative recombination of N 3 + cation was investigated at the heavy-ion storage ring CRYRING [47].…”

Section: Contributedmentioning

confidence: 99%

Charged defects and defect‐induced processes in nitrogen films

Savchenko

Khyzhniy

Uyutnov

et al. 2014

Phys. Status Solidi C

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Radiation effects in solid nitrogen irradiated with an electron beam were studied with emphasis on the role of charged centers in radiation‐induced phenomena. The experiments were performed employing luminescence method and activation spectroscopy techniques – spectrally resolved thermally stimulated luminescence TSL and thermally stimulated exoelectron emission. Samples were probed in depth by varying electron energy, thus discriminating radiation‐induced processes in the bulk and at the surface. Spectroscopic evidence of the excited N2* (C3Πu) molecule desorption was obtained for the first time and mechanism of the phenomenon based on recombination of electron with intrinsic charged center N4+ was proposed. The key role of N3+ center dissociative recombination in generation of N radicals is suggested. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…In the ISM, solid CH 3 is an intermediate reaction product in the formation of methane. It can also be formed through UV-, electrons-and ions-induced dissociation reactions from ice mixtures containing methane (Milligan & Jacox 1967;Bohn et al 1994;Palumbo et al 2004;Hodyss et al 2011;Kim & Kaiser 2012;Wu et al 2012Wu et al , 2013Materese et al 2014Materese et al , 2015Lo et al 2015;Bossa 2015;Chin et al 2016). The solid CH 4 + OH abstraction reaction investigated here, however, can be an important channel for the formation of methyl radicals under interstellar analog conditions.…”

Section: Astrophysical Implicationsmentioning

confidence: 86%

Importance of tunneling in H-abstraction reactions by OH radicals

Lamberts

Fedoseev

Kästner

et al. 2017

A&A

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We present a combined experimental and theoretical study focussing on the quantum tunneling of atoms in the reaction between CH 4 and OH. The importance of this reaction pathway is derived by investigating isotope substituted analogs. Quantitative reaction rates needed for astrochemical models at low temperature are currently unavailable both in the solid state and in the gas phase. Here, we study tunneling effects upon hydrogen abstraction in CH 4 + OH by focusing on two reactions: CH 4 + OD − − → CH 3 + HDO and CD 4 + OH − − → CD 3 + HDO. The experimental study shows that the solid-state reaction rate R CH 4 +OD is higher than R CD 4 +OH at 15 K. Experimental results are accompanied by calculations of the corresponding unimolecular and bimolecular reaction rate constants using instanton theory taking into account surface effects. For the work presented here, the unimolecular reactions are particularly interesting as these provide insight into reactions following a Langmuir-Hinshelwood process. The resulting ratio of the rate constants shows that the H abstraction (k CH 4 +OD ) is approximately ten times faster than D-abstraction (k CD 4 +OH ) at 65 K. We conclude that tunneling is involved at low temperatures in the abstraction reactions studied here. The unimolecular rate constants can be used by the modeling community as a first approach to describe OH-mediated abstraction reactions in the solid phase. For this reason we provide fits of our calculated rate constants that allow the inclusion of these reactions in models in a straightforward fashion.

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Ultraviolet and Infrared Spectra of Electron-Bombarded Solid Nitrogen and Methane Diluted in Solid Nitrogen

Cited by 33 publications

References 40 publications

ICE CHEMISTRY ON OUTER SOLAR SYSTEM BODIES: ELECTRON RADIOLYSIS OF N₂-, CH₄-, AND CO-CONTAINING ICES

ICE CHEMISTRY ON OUTER SOLAR SYSTEM BODIES: ELECTRON RADIOLYSIS OF N₂-, CH₄-, AND CO-CONTAINING ICES

Charged defects and defect‐induced processes in nitrogen films

Importance of tunneling in H-abstraction reactions by OH radicals

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Ultraviolet and Infrared Spectra of Electron-Bombarded Solid Nitrogen and Methane Diluted in Solid Nitrogen

Cited by 33 publications

References 40 publications

ICE CHEMISTRY ON OUTER SOLAR SYSTEM BODIES: ELECTRON RADIOLYSIS OF N2-, CH4-, AND CO-CONTAINING ICES

ICE CHEMISTRY ON OUTER SOLAR SYSTEM BODIES: ELECTRON RADIOLYSIS OF N2-, CH4-, AND CO-CONTAINING ICES

Charged defects and defect‐induced processes in nitrogen films

Importance of tunneling in H-abstraction reactions by OH radicals

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Product

Resources

About

ICE CHEMISTRY ON OUTER SOLAR SYSTEM BODIES: ELECTRON RADIOLYSIS OF N₂-, CH₄-, AND CO-CONTAINING ICES

ICE CHEMISTRY ON OUTER SOLAR SYSTEM BODIES: ELECTRON RADIOLYSIS OF N₂-, CH₄-, AND CO-CONTAINING ICES