Formation of formaldehyde and methanol from the reactions of H atoms with solid CO at 10–20 K

Hiraoka, Kenzo; Ohashi, Nagayuki; Kihara, Yosihide; Yamamoto, Kazuyosi; Sato, Tetsuya; Yamashita, Akihiro

doi:10.1016/0009-2614(94)01066-8

Cited by 138 publications

(106 citation statements)

References 19 publications

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“…Therefore, a comparison of these spectra gives a qualitative picture of the destruction of solid NO 2 and allows for the identification of new species formed through the hydrogenation of the ice. In particular, spectrum (a) confirms the formation of formaldehyde after hydrogenation of 13 CO ice; [25][26][27] spectrum (b) clearly shows all the carbon monoxide isotopologues, as well as the NO 2 monomer, N 2 O 3 and N 2 O 4 . The strong NO 2 feature seen in spectrum (b) at 1612 cm À1 almost disappears in spectrum (c) where new features due to 13 CO 2 , HO 13 CO, H 13 COOH, HNO, and NH 2 OH show up.…”

Section: Formolism Setupmentioning

confidence: 88%

Solid state chemistry of nitrogen oxides – Part II: surface consumption of NO₂

Ioppolo

Fedoseev

Minissale

et al. 2014

Phys. Chem. Chem. Phys.

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Section: Formolism Setupmentioning

confidence: 88%

Solid state chemistry of nitrogen oxides – Part II: surface consumption of NO₂

Ioppolo

Fedoseev

Minissale

et al. 2014

Phys. Chem. Chem. Phys.

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“…It is generally accepted that grain surface reactions, through hydrogenation and oxidation of accreting species, favours the formation of simple molecular species (Tielens & Hagen 1982;Hasegawa & Herbst 1993;Hiraoka et al 1994). The composition of the grain mantle is determined by the most abundant accreting species.…”

Section: Composition and Chemistry Of Interstellar Icesmentioning

confidence: 99%

“…The intermediate radical, HCO, can rapidly react with other atoms including O which can lead to HCOOH formation. The reactions involved have been studied in the laboratory by van Ijzendoorn et al (1983), and more recently by Hiraoka et al (1994Hiraoka et al ( , 1998. These studies seem to imply that H 2 CO is more susceptible to hydrogenation than CO.…”

Section: Composition and Chemistry Of Interstellar Icesmentioning

confidence: 99%

Ice absorption features in the 5-8μm region toward embedded protostars

Keane¹,

Tielens

Boogert

et al. 2001

A&A

238

295

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Abstract.We have obtained 5-8 µm spectra towards 10 embedded protostars using the Short Wavelength Spectrometer on board the Infrared Space Observatory (ISO-SWS) with the aim of studying the composition of interstellar ices. The spectra are dominated by absorption bands at 6.0 µm and 6.85 µm. The observed peak positions, widths and relative intensities of these bands vary dramatically along the different lines of sight. On the basis of comparison with laboratory spectra, the bulk of the 6.0 µm absorption band is assigned to amorphous H2O ice. Additional absorption, in this band, is seen toward 5 sources on the short wavelength wing, near 5.8 µm, and the long wavelength side near 6.2 µm. We attribute the short wavelength absorption to a combination of formic acid (HCOOH) and formaldehyde (H2CO), while the long wavelength absorption has been assigned to the C-C stretching mode of aromatic structures. From an analysis of the 6.85 µm band, we conclude that this band is composed of two components: a volatile component centered near 6.75 µm and a more refractory component at 6.95 µm. From a comparison with various temperature tracers of the thermal history of interstellar ices, we conclude that the two 6.85 µm components are related through thermal processing. We explore several possible carriers of the 6.85 µm absorption band, but no satisfactory identification can be made at present. Finally, we discuss the possible implications for the origin and evolution of interstellar ices that arise from these new results.

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“…Laboratory studies in which CO ice is exposed to atomic hydrogen have been performed independently by two groups (Hiraoka et al 1994, Watanabe & Kouchi 2002. Hiraoka observed only formaldehyde formation, whereas Watanabe also found an effective methanol production.…”

Section: Co Hydrogenationmentioning

confidence: 99%

“…Here clearly both H 2 CO and CH 3 OH are formed, in agreement with . A comparible experiment is performed with a flux similar to the one applied by (Hiraoka et al 1994). At this very low flux and fluence, 1 × 10 12 cm −2 s −1 and 1 × 10 16 cm −2 , the formation of methanol cannot be confirmed by the RAIR spectra as its peak height is near the detection limit.…”

Section: Co Hydrogenationmentioning

confidence: 99%

Formation of alcohols on ice surfaces

et al. 2008

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Abstract. As the number of detections of complex molecules keeps increasing, answering the question about their formation becomes more pressing. Many of the saturated organic molecules are found to have a very low gas phase formation rate and are therefore thought to be formed on the icy surfaces of dust grains. In the Sackler Laboratory for Astrophysics we started a systematic study of the surface reaction routes that have been suggested over the years. Here we present the experimental results on the formation of methanol and ethanol by hydrogenation reactions of carbon monoxide and acetaldehyde ice. Computer simulations of the surface processes under similar conditions using the continuous-time random-walk Monte Carlo technique reveal some of the underlying physical processes. A better understanding of the physical conditions in which these molecules are formed can help in the interpretation of the observational results. The CO hydrogenation results will appear in detail in Fuchs et al. (2008). For more details on ethanol formation we refer to Bisschop et al. (2007).

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Formation of formaldehyde and methanol from the reactions of H atoms with solid CO at 10–20 K

Cited by 138 publications

References 19 publications

Solid state chemistry of nitrogen oxides – Part II: surface consumption of NO₂

Solid state chemistry of nitrogen oxides – Part II: surface consumption of NO₂

Ice absorption features in the 5-8μm region toward embedded protostars

Formation of alcohols on ice surfaces

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Formation of formaldehyde and methanol from the reactions of H atoms with solid CO at 10–20 K

Cited by 138 publications

References 19 publications

Solid state chemistry of nitrogen oxides – Part II: surface consumption of NO2

Solid state chemistry of nitrogen oxides – Part II: surface consumption of NO2

Ice absorption features in the 5-8μm region toward embedded protostars

Formation of alcohols on ice surfaces

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Solid state chemistry of nitrogen oxides – Part II: surface consumption of NO₂

Solid state chemistry of nitrogen oxides – Part II: surface consumption of NO₂