Efficient surface formation route of interstellar hydroxylamine through NO hydrogenation. I. The submonolayer regime on interstellar relevant substrates.

@article{Congiu2012EfficientSF,
  title={Efficient surface formation route of interstellar hydroxylamine through NO hydrogenation. I. The submonolayer regime on interstellar relevant substrates.},
  author={E Congiu and Henda Chaabouni and Carine Laffon and Ph. Parent and Saoud Baouche and Francois Dulieu},
  journal={The Journal of chemical physics},
  year={2012},
  volume={137 5},
  pages={
          054713
        }
}
Dust grains in the interstellar medium are known to serve as the first chemical laboratory where the rich inventory of interstellar molecules are synthesized. Here we present a study of the formation of hydroxylamine--NH(2)OH--via the non-energetic route NO + H (D) on crystalline H(2)O and amorphous silicate under conditions relevant to interstellar dense clouds. Formation of nitrous oxide (N(2)O) and water (H(2)O, D(2)O) is also observed and the reaction network is discussed. Hydroxylamine and… 
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Efficient surface formation route of interstellar hydroxylamine through NO hydrogenation. II. The multilayer regime in interstellar relevant ices.
TLDR
The main conclusion is that hydroxyl-amine formation takes place via a fast and barrierless mechanism and it is found to be even more abundantly formed in a water-rich environment at lower temperatures.
Experimental and Theoretical Study of the Chemical Network of the Hydrogenation of NO on Interstellar Dust Grains
Nitrogen Monoxide (NO) is observed in the gas phase of molecular clouds. It may accrete on dust grains and there its hydrogenation should lead to hydroxylamine (NH 2 OH), the same way that CO is…
Simultaneous hydrogenation and UV-photolysis experiments of NO in CO-rich interstellar ice analogues; linking HNCO, OCN−, NH2CHO, and NH2OH
The laboratory work presented here, simulates the chemistry on icy dust grains as typical for the 'CO freeze-out stage' in dark molecular clouds. It differs from previous studies in that solid-state…
Low-temperature surface formation of NH3 and HNCO: hydrogenation of nitrogen atoms in CO-rich interstellar ice analogues
Solid-state astrochemical reaction pathways have the potential to link the formation of small nitrogen-bearing species, like NH_3 and HNCO, and prebiotic molecules, specifically amino acids. To date,…
Formation of Hydroxylamine in Low-Temperature Interstellar Model Ices.
TLDR
Clear, concise evidence of the formation of hydroxylamine by irradiation of interstellar analogue ices is provided and can help explain the question how potential precursors to complex biorelevant molecules may form in the interstellar medium.
Water formation through O2 + D pathway on cold silicate and amorphous water ice surfaces of interstellar interest.
TLDR
This work explores experimentally the formation of water molecules from O(2) + D reaction on bare silicate surfaces that simulates the grains present in the diffuse interstellar clouds at visual extinctions.
Hydrogenation of CO-bearing species on grains: unexpected chemical desorption of CO
The amount of methanol in the gas phase and the CO depletion from the gas phase are still open problems in astrophysics. In this work, we investigate solid-state hydrogenation of CO-bearing species…
Solid-state formation of CO 2 via the H 2 CO + O reaction
Context. The formation of carbon dioxide ice in quiescent regions of molecular clouds has not yet been fully understood, even though CO2 is one the most abundant species in interstellar ices. Aims.…
Efficient formation route of the prebiotic molecule formamide on interstellar dust grains
Interstellar Complex Organic Molecules are thought to be the building blocks of more complex pre-biotic compounds. In particular, formamide (or methanimide, NH 2 CHO), is presented as a…
Solid state chemistry of nitrogen oxides--part I: surface consumption of NO.
TLDR
It is found that NO2 is efficiently formed in NO + O/O2/O3/N solid surface reactions, which are essentially barrier free and offer a pathway for the formation of NO2 in space.
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References

SHOWING 1-10 OF 106 REFERENCES
Efficient surface formation route of interstellar hydroxylamine through NO hydrogenation. II. The multilayer regime in interstellar relevant ices.
TLDR
The main conclusion is that hydroxyl-amine formation takes place via a fast and barrierless mechanism and it is found to be even more abundantly formed in a water-rich environment at lower temperatures.
Water formation at low temperatures by surface O2 hydrogenation I: Characterization of ice penetration.
TLDR
It is shown that the proposed O(2) hydrogenation scheme is incomplete, suggesting that additional surface reactions should be considered, and the competition between reaction and diffusion of the H atoms into the O( 2) ice explains the unexpected H(2).
Water formation by surface O3 hydrogenation.
TLDR
It is concluded that solid O(3) hydrogenation offers a potential reaction channel for the formation of water in space and the nondetection of solid ozone in dense molecular clouds is consistent with the astrophysical picture in which O( 3) + H is an efficient process under interstellar conditions.
Water formation at low temperatures by surface O2 hydrogenation II: The reaction network.
TLDR
The full reaction scheme for O(2) surface hydrogenation is derived and several reaction steps prove to be much more efficient or less efficient than originally thought.
NO ICE HYDROGENATION: A SOLID PATHWAY TO NH2OH FORMATION IN SPACE
Icy dust grains in space act as catalytic surfaces onto which complex molecules form. These molecules are synthesized through exothermic reactions from precursor radicals and, mostly, hydrogen atom…
Formation of hydroxylamine (NH2OH) in electron-irradiated ammonia-water ices.
TLDR
The experiments provided compelling evidence that the crystalline ammonia-water ice samples can be partially converted to amorphous ices during the electron irradiation; similar to the chemical processes, the irradiation-induced amorphization of the ices is faster at 10 K than that at 50 K--a finding which is similar to electron-irradiated crystalline water ices under identical conditions.
FORMATION OF COMPACT AMORPHOUS H2O ICE BY CODEPOSITION OF HYDROGEN ATOMS WITH OXYGEN MOLECULES ON GRAIN SURFACES
Formation of H2O molecules through the codeposition of oxygen molecules and hydrogen atoms is examined in situ using IR spectroscopy at 10-40 K under various O2 and H fluxes. It is found that H2O and…
Experimental evidence for water formation on interstellar dust grains by hydrogen and oxygen atoms
Context. The synthesis of water is one necessary step in the origin and development of life. It is believed that pristine water is formed and grows on the surface of icy dust grains in dark…
GAS-PHASE SYNTHESIS OF PRECURSORS OF INTERSTELLAR GLYCINE: A COMPUTATIONAL STUDY OF THE REACTIONS OF ACETIC ACID WITH HYDROXYLAMINE AND ITS IONIZED AND PROTONATED DERIVATIVES
A computational study of the reactions of hydroxylamine and its ionized and protonated derivatives with acetic acid is provided. The reaction of neutral hydroxylamine with acetic acid, despite being…
The NO and non-energetic OH radical reactivity: characterization and reaction scheme
The solid phase reaction between NO and non-energetic OH radicals was investigated using helium as a dilution medium at 3 K. The species generated were characterized by in situ Fourier transform…
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