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Li X, Lu B, Jiang J, Wang L, Trabelsi T, Francisco JS, Fang W, Zhou M, Zeng X. Water Complex of Imidogen. J Am Chem Soc 2023; 145:1982-1987. [PMID: 36633923 DOI: 10.1021/jacs.2c12808] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Imidogen (NH) is the simplest nitrogen hydride that plays an important role in combustion and interstellar chemistry, and its combination with H2O is the prototypical amidation reaction of O-H bonds involving a nitrene intermediate. Herein, we report the observation of the elusive water complex of NH, a prereaction complex associated with the amidation reaction in a solid N2 matrix at 10 K. The hydrogen-bonded structure of NH···OH2 (versus HN···HOH) is confirmed via IR spectroscopy with comprehensive isotope labeling (D, 18O, and 15N) and quantum chemical calculations at the UCCSD(T)/aug-cc-pVQZ level of theory. In line with the observed absorption at 350 nm, irradiation of the complex at 365 nm leads to O-H bond insertion, yielding hydroxylamine NH2OH.
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Affiliation(s)
- Xiaolong Li
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Fudan University, 200433 Shanghai, China
| | - Bo Lu
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Fudan University, 200433 Shanghai, China
| | - Junjie Jiang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Fudan University, 200433 Shanghai, China
| | - Lina Wang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Fudan University, 200433 Shanghai, China
| | - Tarek Trabelsi
- Department of Earth and Environment Science, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6243, United States
| | - Joseph S Francisco
- Department of Earth and Environment Science, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6243, United States
| | - Wei Fang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Fudan University, 200433 Shanghai, China
| | - Mingfei Zhou
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Fudan University, 200433 Shanghai, China
| | - Xiaoqing Zeng
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Fudan University, 200433 Shanghai, China
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2
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Bergantini A, de Barros ALF, Toribio NN, Rothard H, Boduch P, da Silveira EF. Infrared Spectroscopic Study on Swift-Ion Irradiation of Solid N 2O-H 2O Samples: Synthesis of N-O Bearing Species in Astrophysical Ices. J Phys Chem A 2022; 126:2007-2017. [PMID: 35302766 DOI: 10.1021/acs.jpca.2c00768] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
As of early 2022, only six species bearing an N-O bond have been detected toward cold molecular clouds and regions of star formation. It is not clear yet if the small number of N-O bond species found in the interstellar medium so far stems from physical and technological limitations of astronomical detection techniques, or whether in fact molecules that bear an N-O bond are for some reason rare in these objects of the interstellar medium. Astronomical N-O bearing molecules are important because they are part of astrochemical models which propose that they are precursors of hydroxylamine (NH2OH), a species linked to the formation of prebiotic amino acids in space. The aim of this study is the better understanding of the open question of the interstellar synthesis of N-O bearing species. We have analyzed by infrared spectroscopy an astrophysically relevant polar ice mixture of N2O:H2O processed by 90 MeV 136Xe23+ ions, which can mimic the physicochemical processes triggered by cosmic rays in water-covered interstellar ice grains. The results show the formation of N2O3 and of H2O2, but no HN-O species of any kind were detected. Such findings are discussed in light of recent studies from our group and from the literature.
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Affiliation(s)
- Alexandre Bergantini
- Department of Electronic Engineering, Centro Federal de Educação Tecnológica Celso Suckow da Fonseca, Avenida Maracanã 229, 20271-110, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Ana Lucia Ferreira de Barros
- Department of Physics, Centro Federal de Educação Tecnológica Celso Suckow da Fonseca, Avenida Maracanã 229, 20271-110, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Naomi Nitahara Toribio
- Department of Physics, Centro Federal de Educação Tecnológica Celso Suckow da Fonseca, Avenida Maracanã 229, 20271-110, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Hermann Rothard
- Centre de Recherche sur les Ions, les Matériaux et la Photonique (CEA/CNRS/ENSICAEN/UNICAEN/Normandie Université), CIMAP-CIRIL-Ganil, Boulevard Henri Becquerel, CS 65133, Caen 14076 Cedex 5, France
| | - Philippe Boduch
- Centre de Recherche sur les Ions, les Matériaux et la Photonique (CEA/CNRS/ENSICAEN/UNICAEN/Normandie Université), CIMAP-CIRIL-Ganil, Boulevard Henri Becquerel, CS 65133, Caen 14076 Cedex 5, France
| | - Enio Frota da Silveira
- Department of Physics, Pontifícia Universidade Católica do Rio de Janeiro, Rua Marquês de São Vicente 225, 22451-900, Rio de Janeiro, Rio de Janeiro, Brazil
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3
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Ogura J, Ruddock LW, Mano N. Cysteine 343 in the substrate binding domain is the primary S-Nitrosylated site in protein disulfide isomerase. Free Radic Biol Med 2020; 160:103-110. [PMID: 32768572 DOI: 10.1016/j.freeradbiomed.2020.07.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 07/18/2020] [Accepted: 07/22/2020] [Indexed: 12/13/2022]
Abstract
Abnormal protein accumulations are typical pathological features for neurodegenerative diseases. Protein disulfide isomerase (PDI) is a critical enzyme in oxidative protein folding. S-nitrosylated PDI has been detected in the postmortem brain in neurodegenerative disease patients, but the effect of S-nitrosylation on PDI function and developing neurodegeneration was not clarified in detail. In this study, we identified that in vitro and in vivo S-nitrosylation of C343 in the b' domain of PDI occurs. Reduced recombinant human PDI (hPDI) reacted quickly with S-nitrosocompounds, with an observed increase in the expected S-nitrosylated species and the appearance of the disulfide state of the active sites. Both Mononitrosylated and dinitrosylated were observed from the S-nitrosylation of hPDI. Dinitrosylated species were S-nitrosylated both cysteines at active site. But, at least in part, mononitrosylated species were S-nitrosylated on cysteine 343 in the substrate binding b' domain. Although active site S-nitrosylation is reversible by reduced glutathione, S-nitrosylation of C343 is comparative stable. S-nitrosylation of PDI in SH-SY5Y cells was observed after the S-nitrosocysteine (SNOC) treatment and S-nitrosylated PDI was still detected 24 h after removing SNOC. While wild-type PDI was S-nitrosylated, the level of S-nitrosylation of the C343S mutant in over-expressed cells was substantially lower and only wild-type PDI of S-nitrosylation remained 24 h after removing SNOC in over-expressed cells. Both of in vitro and in vivo results suggested that S-nitrosylation of C343 in PDI may be the causative effect on physiological changes in neurodegerenative disease patients, and may be useful for the drug development for neurodegenerative diseases.
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Affiliation(s)
- Jiro Ogura
- Department of Pharmaceutical Sciences, Tohoku University Hospital, Sendai, Japan; Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland.
| | - Lloyd W Ruddock
- Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland.
| | - Nariyasu Mano
- Department of Pharmaceutical Sciences, Tohoku University Hospital, Sendai, Japan.
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4
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Tsuge M, Tseng CY, Lee YP. Spectroscopy of prospective interstellar ions and radicals isolated in para-hydrogen matrices. Phys Chem Chem Phys 2018; 20:5344-5358. [DOI: 10.1039/c7cp05680j] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The p-H2 matrix-isolation technique coupled with photolysis in situ or electron bombardment produces protonated or hydrogenated species important in astrochemistry.
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Affiliation(s)
- Masashi Tsuge
- Department of Applied Chemistry and Institute of Molecular Science
- National Chiao Tung University
- Hsinchu 30010
- Taiwan
| | - Chih-Yu Tseng
- Department of Applied Chemistry and Institute of Molecular Science
- National Chiao Tung University
- Hsinchu 30010
- Taiwan
| | - Yuan-Pern Lee
- Department of Applied Chemistry and Institute of Molecular Science
- National Chiao Tung University
- Hsinchu 30010
- Taiwan
- Institute of Atomic and Molecular Sciences
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5
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Tsegaw YA, Góbi S, Förstel M, Maksyutenko P, Sander W, Kaiser RI. Formation of Hydroxylamine in Low-Temperature Interstellar Model Ices. J Phys Chem A 2017; 121:7477-7493. [PMID: 28892389 DOI: 10.1021/acs.jpca.7b07500] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yetsedaw A. Tsegaw
- Lehrstuhl
für Organische Chemie II, Ruhr-Universität Bochum, 44780 Bochum, Germany
| | | | | | | | - Wolfram Sander
- Lehrstuhl
für Organische Chemie II, Ruhr-Universität Bochum, 44780 Bochum, Germany
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6
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Vasconcelos FA, Pilling S, Rocha WRM, Rothard H, Boduch P. Radiolysis of N 2-rich astrophysical ice by swift oxygen ions: implication for space weathering of outer solar system bodies. Phys Chem Chem Phys 2017; 19:24154-24165. [PMID: 28837188 DOI: 10.1039/c7cp04408a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In order to investigate the role of medium mass cosmic rays and energetic solar particles in the processing of N2-rich ice on frozen moons and cold objects in the outer solar system, the bombardment of an N2 : H2O : NH3 : CO2 (98.2 : 1.5 : 0.2 : 0.1) ice mixture at 16 K employing 15.7 MeV 16O5+ was performed. The changes in the ice chemistry were monitored and quantified by Fourier transformed infrared spectroscopy (FTIR). The results indicate the formation of azide radicals (N3), and nitrogen oxides, such as NO, NO2, and N2O, as well as the production of CO, HNCO, and OCN-. The effective formation and destruction cross-sections are roughly on the order of 10-12 cm2 and 10-13 cm2, respectively. From laboratory molecular analyses, we estimated the destruction yields for the parent species and the formation yields for the daughter species. For N2, this value was 9.8 × 105 molecules per impact of ions, and for the most abundant new species (N3), it was 1.1 × 105 molecules per impact of ions. From these yields, an estimation of how many species are destroyed or formed in a given timescale (108 years) in icy bodies in the outer solar system was calculated. This work reinforces the idea that such physicochemical processes triggered by cosmic rays, solar wind, and magnetospheric particles (medium-mass ions) in nitrogen-rich ices may play an important role in the formation of molecules (including pre-biotic species precursors such as amino acids and other "CHON" molecules) in very cold astrophysical environments, such as those in the outer region of the solar system (e.g. Titan, Triton, Pluto, and other KBOs).
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Affiliation(s)
- F A Vasconcelos
- Universidade do Vale do Paraíba-UNIVAP, Instituto de Pesquisa e Desenvolvimento-IP&D, Laboratorio de Astroquímica e Astrobiologia - LASA, São Jose dos Campos, SP, Brazil.
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7
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Sensitivity Analysis of Grain Surface Chemistry to Binding Energies of Ice Species. ACTA ACUST UNITED AC 2017. [DOI: 10.3847/1538-4357/aa78f9] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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8
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Haupa KA, Tielens AGGM, Lee YP. Reaction of H + HONO in solid para-hydrogen: infrared spectrum of ˙ONH(OH). Phys Chem Chem Phys 2017; 19:16169-16177. [DOI: 10.1039/c7cp02621h] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydrogenation reactions in the N/O chemical network are important for an understanding of the mechanism of formation of organic molecules in dark interstellar clouds, but many reactions remain unknown.
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Affiliation(s)
- Karolina Anna Haupa
- Department of Applied Chemistry and Institute of Molecular Science
- National Chiao Tung University
- Hsinchu 30010
- Taiwan
| | | | - Yuan-Pern Lee
- Department of Applied Chemistry and Institute of Molecular Science
- National Chiao Tung University
- Hsinchu 30010
- Taiwan
- Institute of Atomic and Molecular Sciences
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9
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Yao Y, Giapis KP. Dynamic nitroxyl formation in the ammonia oxidation on platinum via Eley–Rideal reactions. Phys Chem Chem Phys 2016; 18:29858-29863. [DOI: 10.1039/c6cp06533c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Simultaneous production of HNO, NO, and OH via Eley–Rideal reactions during the dynamic oxidation of ammonia on Pt surfaces.
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Affiliation(s)
- Yunxi Yao
- Division of Chemistry and Chemical Engineering
- California Institute of Technology
- Pasadena
- USA
| | - Konstantinos P. Giapis
- Division of Chemistry and Chemical Engineering
- California Institute of Technology
- Pasadena
- USA
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10
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McGuire BA, Carroll PB, Dollhopf NM, Crockett NR, Corby JF, Loomis RA, M. Burkhardt A, Shingledecker C, Blake GA, Remijan AJ. CSO AND CARMA OBSERVATIONS OF L1157. I. A DEEP SEARCH FOR HYDROXYLAMINE (NH2OH). ACTA ACUST UNITED AC 2015. [DOI: 10.1088/0004-637x/812/1/76] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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11
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12
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He J, Vidali G, Lemaire JL, Garrod RT. FORMATION OF HYDROXYLAMINE ON DUST GRAINS VIA AMMONIA OXIDATION. ACTA ACUST UNITED AC 2015. [DOI: 10.1088/0004-637x/799/1/49] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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13
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Abstract
Hydrophobic polymer amide (HPA) could have been one of the first normal density materials to accrete in space. We present ab initio calculations of the energetics of amino acid polymerization via gas phase collisions. The initial hydrogen-bonded di-peptide is sufficiently stable to proceed in many cases via a transition state into a di-peptide with an associated bound water molecule of condensation. The energetics of polymerization are only favorable when the water remains bound. Further polymerization leads to a hydrophobic surface that is phase-separated from, but hydrogen bonded to, a small bulk water complex. The kinetics of the collision and subsequent polymerization are discussed for the low-density conditions of a molecular cloud. This polymer in the gas phase has the properties to make a topology, viz. hydrophobicity allowing phase separation from bulk water, capability to withstand large temperature ranges, versatility of form and charge separation. Its flexible tetrahedral carbon atoms that alternate with more rigid amide groups allow it to deform and reform in hazardous conditions and its density of hydrogen bonds provides adhesion that would support accretion to it of silicon and metal elements to form a stellar dust material.
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Affiliation(s)
- Julie E. M. McGeoch
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, Massachusetts, United States of America
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14
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Ioppolo S, Fedoseev G, Minissale M, Congiu E, Dulieu F, Linnartz H. Solid state chemistry of nitrogen oxides – Part II: surface consumption of NO2. Phys Chem Chem Phys 2014; 16:8270-82. [DOI: 10.1039/c3cp54918f] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Efficient surface destruction mechanisms (NO2 + H/O/N), leading to solid H2O, NH2OH, and N2O, can explain the non-detection of NO2 in space.
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Affiliation(s)
- S. Ioppolo
- Division of Geological and Planetary Sciences
- California Institute of Technology
- Pasadena, USA
- Institute for Molecules and Materials
- Radboud University Nijmegen
| | - G. Fedoseev
- Raymond and Beverly Sackler Laboratory for Astrophysics
- Leiden Observatory
- Leiden University
- 2300 RA Leiden, The Netherlands
| | - M. Minissale
- LERMA-LAMAp
- Université de Cergy-Pontoise
- Observatoire de Paris
- ENS
- UPMC
| | - E. Congiu
- LERMA-LAMAp
- Université de Cergy-Pontoise
- Observatoire de Paris
- ENS
- UPMC
| | - F. Dulieu
- LERMA-LAMAp
- Université de Cergy-Pontoise
- Observatoire de Paris
- ENS
- UPMC
| | - H. Linnartz
- Raymond and Beverly Sackler Laboratory for Astrophysics
- Leiden Observatory
- Leiden University
- 2300 RA Leiden, The Netherlands
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15
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Ioppolo S, McGuire BA, Allodi MA, Blake GA. THz and mid-IR spectroscopy of interstellar ice analogs: methyl and carboxylic acid groups. Faraday Discuss 2014; 168:461-84. [DOI: 10.1039/c3fd00154g] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A fundamental problem in astrochemistry concerns the synthesis and survival of complex organic molecules (COMs) throughout the process of star and planet formation. While it is generally accepted that most complex molecules and prebiotic species form in the solid phase on icy grain particles, a complete understanding of the formation pathways is still largely lacking. To take full advantage of the enormous number of available THz observations (e.g.,Herschel Space Observatory, SOFIA, and ALMA), laboratory analogs must be studied systematically. Here, we present the THz (0.3–7.5 THz; 10–250 cm−1) and mid–IR (400–4000 cm−1) spectra of astrophysically-relevant species that share the same functional groups, including formic acid (HCOOH) and acetic acid (CH3COOH), and acetaldehyde (CH3CHO) and acetone ((CH3)2CO), compared to more abundant interstellar molecules such as water (H2O), methanol (CH3OH), and carbon monoxide (CO). A suite of pure and mixed binary ices are discussed. The effects on the spectra due to the composition and the structure of the ice at different temperatures are shown. Our results demonstrate that THz spectra are sensitive to reversible and irreversible transformations within the ice caused by thermal processing, suggesting that THz spectra can be used to study the composition, structure, and thermal history of interstellar ices. Moreover, the THz spectrum of an individual species depends on the functional group(s) within that molecule. Thus, future THz studies of different functional groups will help in characterizing the chemistry and physics of the interstellar medium (ISM).
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Affiliation(s)
- S. Ioppolo
- Division of Geological and Planetary Sciences
- California Institute of Technology
- Pasadena, USA
- Institute for Molecules and Materials
- Radboud University Nijmegen
| | - B. A. McGuire
- Division of Chemistry and Chemical Engineering
- California Institute of Technology
- Pasadena, USA
| | - M. A. Allodi
- Division of Chemistry and Chemical Engineering
- California Institute of Technology
- Pasadena, USA
| | - G. A. Blake
- Division of Geological and Planetary Sciences
- California Institute of Technology
- Pasadena, USA
- Division of Chemistry and Chemical Engineering
- California Institute of Technology
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16
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Minissale M, Fedoseev G, Congiu E, Ioppolo S, Dulieu F, Linnartz H. Solid state chemistry of nitrogen oxides – Part I: surface consumption of NO. Phys Chem Chem Phys 2014; 16:8257-69. [DOI: 10.1039/c3cp54917h] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
NO2 is efficiently formed in the solid state via NO + O/O2/O3 reactions.
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Affiliation(s)
- M. Minissale
- LERMA-LAMAp
- Université de Cergy-Pontoise
- Observatoire de Paris
- ENS
- UPMC
| | - G. Fedoseev
- Raymond and Beverly Sackler Laboratory for Astrophysics
- Leiden Observatory
- Leiden University
- 2300 RA Leiden, The Netherlands
| | - E. Congiu
- LERMA-LAMAp
- Université de Cergy-Pontoise
- Observatoire de Paris
- ENS
- UPMC
| | - S. Ioppolo
- Division of Geological and Planetary Sciences
- California Institute of Technology
- Pasadena, USA
- Institute for Molecules and Materials
- Radboud University Nijmegen
| | - F. Dulieu
- LERMA-LAMAp
- Université de Cergy-Pontoise
- Observatoire de Paris
- ENS
- UPMC
| | - H. Linnartz
- Raymond and Beverly Sackler Laboratory for Astrophysics
- Leiden Observatory
- Leiden University
- 2300 RA Leiden, The Netherlands
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17
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Congiu E, Minissale M, Baouche S, Chaabouni H, Moudens A, Cazaux S, Manicò G, Pirronello V, Dulieu F. Efficient diffusive mechanisms of O atoms at very low temperatures on surfaces of astrophysical interest. Faraday Discuss 2014; 168:151-66. [DOI: 10.1039/c4fd00002a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
At the low temperatures of interstellar dust grains, it is well established that surface chemistry proceeds via diffusive mechanisms of H atoms weakly bound (physisorbed) to the surface. Until recently, however, it was unknown whether atoms heavier than hydrogen could diffuse rapidly enough on interstellar grains to react with other accreted species. In addition, models still require simple reduction as well as oxidation reactions to occur on grains to explain the abundances of various molecules. In this paper we investigate O-atom diffusion and reactivity on a variety of astrophysically relevant surfaces (water ice of three different morphologies, silicate, and graphite) in the 6.5–25 K temperature range. Experimental values were used to derive a diffusion law that emphasizes that O atoms diffuse by quantum mechanical tunnelling at temperatures as low as 6.5 K. The rates of diffusion on each surface, based on modelling results, were calculated and an empirical law is given as a function of the surface temperature. The relative diffusion rates are kH2Oice > ksil > kgraph ≫ kexpected. The implications of efficient O-atom diffusion over astrophysically relevant time-scales are discussed. Our findings show that O atoms can scan any available reaction partners (e.g., either another H atom, if available, or a surface radical like O or OH) at a faster rate than that of accretion. Also, as dense clouds mature, H2 becomes far more abundant than H and the O : H ratio grows, and the reactivity of O atoms on grains is such that O becomes one of the dominant reactive partners together with H.
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Affiliation(s)
- Emanuele Congiu
- LERMA Université de Cergy-Pontoise and Observatoire de Paris
- ENS
- UPMC
- UMR 8112 du CNRS
- 95000 Cergy Pontoise cedex, France
| | - Marco Minissale
- LERMA Université de Cergy-Pontoise and Observatoire de Paris
- ENS
- UPMC
- UMR 8112 du CNRS
- 95000 Cergy Pontoise cedex, France
| | - Saoud Baouche
- LERMA Université de Cergy-Pontoise and Observatoire de Paris
- ENS
- UPMC
- UMR 8112 du CNRS
- 95000 Cergy Pontoise cedex, France
| | - Henda Chaabouni
- LERMA Université de Cergy-Pontoise and Observatoire de Paris
- ENS
- UPMC
- UMR 8112 du CNRS
- 95000 Cergy Pontoise cedex, France
| | - Audrey Moudens
- LERMA Université de Cergy-Pontoise and Observatoire de Paris
- ENS
- UPMC
- UMR 8112 du CNRS
- 95000 Cergy Pontoise cedex, France
| | | | - Giulio Manicò
- Dipartimento di Fisica e Astronomia
- Università di Catania
- 95123 Catania, Italy
| | - Valerio Pirronello
- Dipartimento di Fisica e Astronomia
- Università di Catania
- 95123 Catania, Italy
| | - François Dulieu
- LERMA Université de Cergy-Pontoise and Observatoire de Paris
- ENS
- UPMC
- UMR 8112 du CNRS
- 95000 Cergy Pontoise cedex, France
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18
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Fioroni M. Astrochemistry of transition metals? The selected cases of [FeN]+, [FeNH]+ and [(CO)2FeN]+: pathways toward CH3NH2 and HNCO. Phys Chem Chem Phys 2014; 16:24312-22. [DOI: 10.1039/c4cp03218g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transition metals are proposed to play an active role in the synthesis of organic compounds containing heteroatoms in astrochemistry.
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19
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Zins EL, Krim L. Hydrogenation processes from hydrogen peroxide: an investigation in Ne matrix for astrochemical purposes. RSC Adv 2014. [DOI: 10.1039/c4ra01920b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Hydrogenation processes of hydrogen peroxide leading to the formation of water.
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Affiliation(s)
- Emilie-Laure Zins
- Sorbonne Universités
- UPMC Univ Paris 06
- Paris, France
- CNRS
- Paris, France
| | - Lahouari Krim
- Sorbonne Universités
- UPMC Univ Paris 06
- Paris, France
- CNRS
- Paris, France
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20
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Ioppolo S, Fedoseev G, Lamberts T, Romanzin C, Linnartz H. SURFRESIDE(2): an ultrahigh vacuum system for the investigation of surface reaction routes of interstellar interest. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2013; 84:073112. [PMID: 23902049 DOI: 10.1063/1.4816135] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A new ultrahigh vacuum experiment is described to study atom and radical addition reactions in interstellar ice analogues for astronomically relevant temperatures. The new setup - SURFace REaction SImulation DEvice (SURFRESIDE(2)) - allows a systematic investigation of solid state pathways resulting in the formation of molecules of astrophysical interest. The implementation of a double beam line makes it possible to expose deposited ice molecules to different atoms and/or radicals sequentially or at the same time. Special efforts are made to perform experiments under fully controlled laboratory conditions, including precise atom flux determinations, in order to characterize reaction channels quantitatively. In this way, we can compare and combine different surface reaction channels with the aim to unravel the solid state processes at play in space. Results are constrained in situ by means of a Fourier transform infrared spectrometer and a quadrupole mass spectrometer using reflection absorption infrared spectroscopy and temperature programmed desorption, respectively. The performance of the new setup is demonstrated on the example of carbon dioxide formation by comparing the efficiency through two different solid state channels (CO + OH → CO2 + H and CO + O → CO2) for which different addition products are needed. The potential of SURFRESIDE(2) to study complex molecule formation, including nitrogen containing (prebiotic) compounds, is discussed.
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Affiliation(s)
- S Ioppolo
- Sackler Laboratory for Astrophysics, Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands.
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Congiu E, Chaabouni H, Laffon C, Parent P, Baouche S, Dulieu F. Efficient surface formation route of interstellar hydroxylamine through NO hydrogenation. I. The submonolayer regime on interstellar relevant substrates. J Chem Phys 2012; 137:054713. [DOI: 10.1063/1.4738895] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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