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Tinacci L, Germain A, Pantaleone S, Ferrero S, Ceccarelli C, Ugliengo P. Theoretical Distribution of the Ammonia Binding Energy at Interstellar Icy Grains: A New Computational Framework. ACS EARTH & SPACE CHEMISTRY 2022; 6:1514-1526. [PMID: 35747467 PMCID: PMC9208021 DOI: 10.1021/acsearthspacechem.2c00040] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Revised: 05/19/2022] [Accepted: 05/19/2022] [Indexed: 06/15/2023]
Abstract
The binding energies (BE) of molecules on the interstellar grains are crucial in the chemical evolution of the interstellar medium (ISM). Both temperature-programmed desorption (TPD) laboratory experiments and quantum chemistry computations have often provided, so far, only single values of the BE for each molecule. This is a severe limitation, as the ices enveloping the grain mantles are structurally amorphous, giving rise to a manifold of possible adsorption sites, each with different BEs. However, the amorphous ice nature prevents the knowledge of structural details, hindering the development of a common accepted atomistic icy model. In this work, we propose a computational framework that closely mimics the formation of the interstellar grain mantle through a water by water accretion. On that grain, an unbiased random (but well reproducible) positioning of the studied molecule is then carried out. Here we present the test case of NH3, a ubiquitous species in the molecular ISM. We provide the BE distribution computed by a hierarchy approach, using the semiempirical xTB-GFN2 as a low-level method to describe the whole icy cluster in combination with the B97D3 DFT functional as a high-level method on the local zone of the NH3 interaction. The final ZPE-corrected BE is computed at the ONIOM(DLPNO-CCSD(T)//B97D3:xTB-GFN2) level, ensuring the best cost/accuracy ratio. The main peak of the predicted NH3 BE distribution is in agreement with experimental TPD and computed data in the literature. A second broad peak at very low BE values is also present, which has never been detected before. It may provide the solution to a longstanding puzzle about the presence of gaseous NH3 also observed in cold ISM objects.
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Affiliation(s)
- Lorenzo Tinacci
- Dipartimento
di Chimica, Università degli Studi
di Torino, via P. Giuria
7, 10125 Torino, Italy
- Institut
de Planétologie et d’Astrophysique de Grenoble (IPAG), 38000 Grenoble, France
| | - Auréle Germain
- Dipartimento
di Chimica, Università degli Studi
di Torino, via P. Giuria
7, 10125 Torino, Italy
| | - Stefano Pantaleone
- Dipartimento
di Chimica, Università degli Studi
di Torino, via P. Giuria
7, 10125 Torino, Italy
- Dipartimento
di Chimica, Biologia e Biotecnologie, Università
degli Studi di Perugia, 06123 Perugia, Italy
| | - Stefano Ferrero
- Departament
de Quimica, Universitat Autònoma
de Barcelona, 08193 Bellaterra, Catalonia Spain
| | - Cecilia Ceccarelli
- Institut
de Planétologie et d’Astrophysique de Grenoble (IPAG), 38000 Grenoble, France
| | - Piero Ugliengo
- Dipartimento
di Chimica, Università degli Studi
di Torino, via P. Giuria
7, 10125 Torino, Italy
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Wakelam V, Bron E, Cazaux S, Dulieu F, Gry C, Guillard P, Habart E, Hornekær L, Morisset S, Nyman G, Pirronello V, Price SD, Valdivia V, Vidali G, Watanabe N. H 2 formation on interstellar dust grains: The viewpoints of theory, experiments, models and observations. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.molap.2017.11.001] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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3
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Cai Z, She L, He Y, Wu L, Cai L, Zhong D. Halogen-Free On-Surface Synthesis of Rylene-Type Graphene Nanoribbons. MACROMOL CHEM PHYS 2017. [DOI: 10.1002/macp.201700155] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Zeying Cai
- School of Physics and State Key Laboratory of Optoelectronic Materials and Technologies; Sun Yat-sen University; Xingang Xi Road 135 510275 Guangzhou China
| | - Limin She
- School of Physics and State Key Laboratory of Optoelectronic Materials and Technologies; Sun Yat-sen University; Xingang Xi Road 135 510275 Guangzhou China
| | - Yangyong He
- School of Physics and State Key Laboratory of Optoelectronic Materials and Technologies; Sun Yat-sen University; Xingang Xi Road 135 510275 Guangzhou China
| | - Liqin Wu
- School of Physics and State Key Laboratory of Optoelectronic Materials and Technologies; Sun Yat-sen University; Xingang Xi Road 135 510275 Guangzhou China
| | - Lang Cai
- School of Physics and State Key Laboratory of Optoelectronic Materials and Technologies; Sun Yat-sen University; Xingang Xi Road 135 510275 Guangzhou China
| | - Dingyong Zhong
- School of Physics and State Key Laboratory of Optoelectronic Materials and Technologies; Sun Yat-sen University; Xingang Xi Road 135 510275 Guangzhou China
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Ueta H, Watanabe N, Hama T, Kouchi A. Surface Temperature Dependence of Hydrogen Ortho-Para Conversion on Amorphous Solid Water. PHYSICAL REVIEW LETTERS 2016; 116:253201. [PMID: 27391719 DOI: 10.1103/physrevlett.116.253201] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Indexed: 06/06/2023]
Abstract
The surface temperature dependence of the ortho-to-para conversion of H_{2} on amorphous solid water is first reported. A combination of photostimulated desorption and resonance-enhanced multiphoton ionization techniques allowed us to sensitively probe the conversion on the surface of amorphous solid water at temperatures of 9.2-16 K. Within a narrow temperature window of 8 K, the conversion time steeply varied from ∼4.1×10^{3} to ∼6.4×10^{2} s. The observed temperature dependence is discussed in the context of previously suggested models and the energy dissipation process. The two-phonon process most likely dominates the conversion rate at low temperatures.
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Affiliation(s)
- Hirokazu Ueta
- Institute of Low Temperature Science (ILTS), Hokkaido University, Sapporo 060-0819, Japan
| | - Naoki Watanabe
- Institute of Low Temperature Science (ILTS), Hokkaido University, Sapporo 060-0819, Japan
| | - Tetsuya Hama
- Institute of Low Temperature Science (ILTS), Hokkaido University, Sapporo 060-0819, Japan
| | - Akira Kouchi
- Institute of Low Temperature Science (ILTS), Hokkaido University, Sapporo 060-0819, Japan
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6
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Kunisada Y, Kasai H. Hindered rotational physisorption states of H2 on Ag(111) surfaces. Phys Chem Chem Phys 2015; 17:19625-30. [PMID: 26151425 DOI: 10.1039/c5cp01701g] [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]
Abstract
We have investigated the physisorption states of H2 on Ag(111) surfaces. To clarify the accurate adsorption properties of H2 on Ag(111), we performed first-principles calculations based on spin-polarized density functional theory (DFT) with the semiempirical DFT-D2 method and the newly-developed exchange functional with the non-local correlation functional vdW-DF2 (rev-vdW-DF2). We constructed exhaustive potential energy surfaces, and revealed that non-negligible out-of-plane potential anisotropy with a perpendicular orientation preference exists even for H2 physisorption on planar Ag(111), as predicted by previous results of resonance-enhanced multiphoton ionization spectroscopy and temperature-programmed desorption experiments. Therefore, the molecular rotational ground states of ortho-H2 split into two energy levels in the anisotropic potential. The obtained adsorption energy and the number of bound states, including the zero-point energies and the rotational energy shift, agree with diffractive and rotationally mediated selective adsorption scattering resonance measurements. The origin of the potential anisotropy on Ag(111) is a combination of the London dispersion interaction and the virtual transition of the metal electron to the unoccupied molecular state.
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Affiliation(s)
- Y Kunisada
- Center for Advanced Research of Energy and Materials, Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan.
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Amiaud L, Fillion JH, Dulieu F, Momeni A, Lemaire JL. Physisorption and desorption of H2, HD and D2 on amorphous solid water ice. Effect on mixing isotopologue on statistical population of adsorption sites. Phys Chem Chem Phys 2015; 17:30148-57. [DOI: 10.1039/c5cp03985a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We study the adsorption and desorption of three isotopologues of molecular hydrogen mixed on 10 ML of porous amorphous water ice (ASW) deposited at 10 K.
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Affiliation(s)
- Lionel Amiaud
- Institut des Sciences Moléculaires d'Orsay (ISMO)
- CNRS
- University Paris-Sud
- Université Paris-Saclay
- F-91405 Orsay
| | | | - François Dulieu
- LERMA
- Observatoire de Paris
- PSL Research University
- CNRS
- Sorbonnes Universités
| | - Anouchah Momeni
- Institut des Sciences Moléculaires d'Orsay (ISMO)
- CNRS
- University Paris-Sud
- Université Paris-Saclay
- F-91405 Orsay
| | - Jean-Louis Lemaire
- Institut des Sciences Moléculaires d'Orsay (ISMO)
- CNRS
- University Paris-Sud
- Université Paris-Saclay
- F-91405 Orsay
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He J, Vidali G. Application of a diffusion-desorption rate equation model in astrochemistry. Faraday Discuss 2014; 168:517-32. [PMID: 25302396 DOI: 10.1039/c3fd00113j] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Desorption and diffusion are two of the most important processes on interstellar grain surfaces; knowledge of them is critical for the understanding of chemical reaction networks in the interstellar medium (ISM). However, a lack of information on desorption and diffusion is preventing further progress in astrochemistry. To obtain desorption energy distributions of molecules from the surfaces of ISM-related materials, one usually carries out adsorption-desorption temperature programmed desorption (TPD) experiments, and uses rate equation models to extract desorption energy distributions. However, the often-used rate equation models fail to adequately take into account diffusion processes and thus are only valid in situations where adsorption is strongly localized. As adsorption-desorption experiments show that adsorbate molecules tend to occupy deep adsorption sites before occupying shallow ones, a diffusion process must be involved. Thus, it is necessary to include a diffusion term in the model that takes into account the morphology of the surface as obtained from analyses of TPD experiments. We take the experimental data of CO desorption from the MgO(100) surface and of D2 desorption from amorphous solid water ice as examples to show how a diffusion-desorption rate equation model explains the redistribution of adsorbate molecules among different adsorption sites. We extract distributions of desorption energies and diffusion energy barriers from TPD profiles. These examples are contrasted with a system where adsorption is strongly localized--HD from an amorphous silicate surface. Suggestions for experimental investigations are provided.
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Minissale M, Congiu E, Dulieu F. Oxygen diffusion and reactivity at low temperature on bare amorphous olivine-type silicate. J Chem Phys 2014; 140:074705. [DOI: 10.1063/1.4864657] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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11
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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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12
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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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13
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Mitterdorfer C, Bauer M, Youngs TGA, Bowron DT, Hill CR, Fraser HJ, Finney JL, Loerting T. Small-angle neutron scattering study of micropore collapse in amorphous solid water. Phys Chem Chem Phys 2014; 16:16013-20. [DOI: 10.1039/c4cp00593g] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Amorphous solid water (ASW) is shown to undergo a micropore collapse from cylindrical pores (3D) to lamellae (2D) at >120 K using small-angle neutron scattering.
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Affiliation(s)
| | - Marion Bauer
- Institute of General
- Inorganic and Theoretical Chemistry
- University of Innsbruck
- A-6020 Innsbruck, Austria
| | | | - Daniel T. Bowron
- ISIS Facility
- Rutherford Appleton Laboratory
- Harwell Oxford
- Didcot, UK
| | - Catherine R. Hill
- Department of Physical Sciences
- The Open University
- Milton Keynes MK7 6AA, UK
| | - Helen J. Fraser
- Department of Physical Sciences
- The Open University
- Milton Keynes MK7 6AA, UK
| | - John L. Finney
- Department of Physics and Astronomy and London Centre for Nanotechnology
- University College London
- London WC1E 6BT, UK
| | - Thomas Loerting
- Institute of Physical Chemistry
- University of Innsbruck
- A-6020 Innsbruck, Austria
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He J, Jing D, Vidali G. Atomic oxygen diffusion on and desorption from amorphous silicate surfaces. Phys Chem Chem Phys 2014; 16:3493-500. [DOI: 10.1039/c3cp54328e] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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15
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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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Affiliation(s)
- Gianfranco Vidali
- Syracuse University , 201 Physics Building, Syracuse, New York 13244, United States
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Hama T, Watanabe N. Surface Processes on Interstellar Amorphous Solid Water: Adsorption, Diffusion, Tunneling Reactions, and Nuclear-Spin Conversion. Chem Rev 2013; 113:8783-839. [DOI: 10.1021/cr4000978] [Citation(s) in RCA: 211] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tetsuya Hama
- Institute of Low Temperature
Science, Hokkaido University, N19W8 Kita-ku, Sapporo, Hokkaido 060-0819, Japan
| | - Naoki Watanabe
- Institute of Low Temperature
Science, Hokkaido University, N19W8 Kita-ku, Sapporo, Hokkaido 060-0819, Japan
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Mella M, Curotto E. Quantum simulations of the hydrogen molecule on ammonia clusters. J Chem Phys 2013; 139:124319. [PMID: 24089779 DOI: 10.1063/1.4821648] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Mixed ammonia-hydrogen molecule clusters [H2-(NH3)n] have been studied with the aim of exploring the quantitative importance of the H2 quantum motion in defining their structure and energetics. Minimum energy structures have been obtained employing genetic algorithm-based optimization methods in conjunction with accurate pair potentials for NH3-NH3 and H2-NH3. These include both a full 5D potential and a spherically averaged reduced surface mimicking the presence of a para-H2. All the putative global minima for n ≥ 7 are characterized by H2 being adsorbed onto a rhomboidal ammonia tetramer motif formed by two double donor and two double acceptor ammonia molecules. In a few cases, the choice of specific rhombus seems to be directed by the vicinity of an ammonia ad-molecule. Diffusion Monte Carlo simulations on a subset of the species obtained highlighted important quantum effects in defining the H2 surface distribution, often resulting in populating rhomboidal sites different from the global minimum one, and showing a compelling correlation between local geometrical features and the relative stability of surface H2. Clathrate-like species have also been studied and suggested to be metastable over a broad range of conditions if formed.
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Affiliation(s)
- Massimo Mella
- Dipartimento di Scienze ed Alta Tecnologia, Università degli Studi dell'Insubria, via Valleggio 11, 22100 Como, Italy
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Minissale M, Congiu E, Baouche S, Chaabouni H, Moudens A, Dulieu F, Manicó G, Pirronello V. Formation of nitrogen oxides via NO+O2 gas–solid reaction on cold surfaces. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2013.02.028] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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20
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Clemens A, Hellberg L, Grönbeck H, Chakarov D. Water desorption from nanostructured graphite surfaces. Phys Chem Chem Phys 2013; 15:20456-62. [DOI: 10.1039/c3cp52554f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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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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22
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Polak M, Rubinovich L. Remarkable nanoconfinement effects on chemical equilibrium manifested in nucleotide dimerization and H-D exchange reactions. Phys Chem Chem Phys 2011; 13:16728-34. [PMID: 21858361 DOI: 10.1039/c1cp21719d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nanoconfinement entropic effects on chemical equilibrium involving a small number of molecules, which we term NCECE, are revealed by two widely diverse types of reactions. Employing statistical-mechanical principles, we show how the NCECE effect stabilizes nucleotide dimerization observed within self-assembled molecular cages. Furthermore, the effect provides the basis for dimerization even under an aqueous environment inside the nanocage. Likewise, the NCECE effect is pertinent to a longstanding issue in astrochemistry, namely the extra deuteration commonly observed for molecules reacting on interstellar dust grain surfaces. The origin of the NCECE effect is elucidated by means of the probability distributions of the reaction extent and related variations in the reactant-product mixing entropy. Theoretical modelling beyond our previous preliminary work highlights the role of the nanospace size in addition to that of the nanosystem size, namely the limited amount of molecules in the reaction mixture. Furthermore, the NCECE effect can depend also on the reaction mechanism, and on deviations from stoichiometry. The NCECE effect, leading to enhanced, greatly variable equilibrium "constants", constitutes a unique physical-chemical phenomenon, distinguished from the usual thermodynamical properties of macroscopically large systems. Being significant particularly for weakly exothermic reactions, the effects should stabilize products in other closed nanoscale structures, and thus can have notable implications for the growing nanotechnological utilization of chemical syntheses conducted within confined nanoreactors.
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Affiliation(s)
- Micha Polak
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
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Chehrouri M, Fillion JH, Chaabouni H, Mokrane H, Congiu E, Dulieu F, Matar E, Michaut X, Lemaire JL. Nuclear spin conversion of molecular hydrogen on amorphous solid water in the presence of O2traces. Phys Chem Chem Phys 2011; 13:2172-8. [DOI: 10.1039/c0cp01322f] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Accolla M, Congiu E, Dulieu F, Manicò G, Chaabouni H, Matar E, Mokrane H, Lemaire JL, Pirronello V. Changes in the morphology of interstellar ice analogues after hydrogen atom exposure. Phys Chem Chem Phys 2011; 13:8037-45. [DOI: 10.1039/c0cp01462a] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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He J, Frank P, Vidali G. Interaction of hydrogen with surfaces of silicates: single crystal vs. amorphous. Phys Chem Chem Phys 2011; 13:15803-9. [DOI: 10.1039/c1cp21601e] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Li L, Zhao H, Vidali G, Frank Y, Lohmar I, Perets HB, Biham O. Interaction of Atomic and Molecular Hydrogen with Tholin Surfaces at Low Temperatures. J Phys Chem A 2010; 114:10575-83. [DOI: 10.1021/jp104944y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ling Li
- Physics Department, Syracuse University, Syracuse, New York 13244, Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel, and Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138
| | - Hui Zhao
- Physics Department, Syracuse University, Syracuse, New York 13244, Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel, and Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138
| | - Gianfranco Vidali
- Physics Department, Syracuse University, Syracuse, New York 13244, Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel, and Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138
| | - Yechiel Frank
- Physics Department, Syracuse University, Syracuse, New York 13244, Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel, and Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138
| | - Ingo Lohmar
- Physics Department, Syracuse University, Syracuse, New York 13244, Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel, and Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138
| | - Hagai B. Perets
- Physics Department, Syracuse University, Syracuse, New York 13244, Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel, and Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138
| | - Ofer Biham
- Physics Department, Syracuse University, Syracuse, New York 13244, Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel, and Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138
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Vidali G, Li L. Molecular hydrogen desorption from amorphous surfaces at low temperature. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010; 22:304012. [PMID: 21399344 DOI: 10.1088/0953-8984/22/30/304012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We studied the desorption of hydrogen molecules from amorphous silicates of composition (Fe(x)Mg(1 - x))(2)SiO(4) (0 < x < 1) using thermal programmed desorption (TPD). Selected measurements of formation of molecular hydrogen on and desorption from a single crystal olivine sample were done for comparison. The experiments were conducted in conditions as close as technically possible to those found in selected interstellar medium environments, where the formation of molecular hydrogen takes place on dust grains. From molecular desorption data, we derive the energy distribution of binding sites using a direct inversion method. The application of this type of data to the study of elementary processes of migration of atoms and molecules on and ejection from disordered surfaces at low temperature is discussed.
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Affiliation(s)
- G Vidali
- Syracuse University, Syracuse, NY 13244-1130, USA.
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Burke DJ, Brown WA. Ice in space: surface science investigations of the thermal desorption of model interstellar ices on dust grain analogue surfaces. Phys Chem Chem Phys 2010; 12:5947-69. [DOI: 10.1039/b917005g] [Citation(s) in RCA: 124] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Fillion JH, Amiaud L, Congiu E, Dulieu F, Momeni A, Lemaire JL. D(2) desorption kinetics on amorphous solid water: from compact to porous ice films. Phys Chem Chem Phys 2009; 11:4396-402. [PMID: 19458844 DOI: 10.1039/b822492g] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The desorption kinetics of D(2) from amorphous solid water (ASW) films have been studied by the temperature-programmed desorption (TPD) technique in the 10-30 K temperature range. Compact (and nonporous) films were grown at 120 K over a copper substrate. Ultra-thin porous films were additionally grown at 10 K over the compact base. The TPD spectra from compact and from up to 20 monolayers (ML) porous films were compared. The simulation of the TPD experimental traces provides the corresponding D(2) binding-energy distributions. As compared to the compact case, the binding-energy distribution found for the 10 ML porous film clearly extends to higher energies. To study the transition from compact to porous ice, porous films of intermediate thicknesses (<10 ML), including ultra-thin films (<1 ML), were grown over the compact substrate. The thermal D(2) desorption peak was found to shift to higher temperatures as the porous ice network was progressively formed. This behavior can be explained by the formation of more energetic binding sites related to porous films. TPD spectra were also modelled by using a combination of the two energy distributions, one associated to a bare compact ice and the other associated to a 10 ML porous ice film. This analysis reveals a very fast evolution of the binding-energy distribution towards that of porous ice. Our results show that few ML of additional porous film are sufficient to produce a sample for which the D(2) adsorption can be described by the energy distribution found for the 10 ML porous film. These experiments then provide evidence that the binding energy of D(2) on ASW ice is primarily governed by the topological and morphological disorder of the surface at molecular scale.
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Affiliation(s)
- Jean-Hugues Fillion
- LERMA-LAMAp, UMR CNRS 8112, Université Cergy-Pontoise et Observatoire de Paris, 5 Mail Gay-Lussac, F-95000, Cergy-Pontoise, France.
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Bachellerie D, Sizun M, Aguillon F, Sidis V. Effects of a Nonrigid Graphene Surface on the LH Associative Desorption of H Atoms and on the Deexcitation of Nascent H2 Molecules Colliding with Model Walls of Carbonaceous Porous Material. J Phys Chem A 2008; 113:108-17. [DOI: 10.1021/jp808082b] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- D. Bachellerie
- Université Paris-Sud, Laboratoire des Collisions Atomiques et Moléculaires, UMR8625, Orsay, F-91405, France, and CNRS, Laboratoire des Collisions Atomiques et Moléculaires, UMR8625, Orsay, F-91405, France
| | - M. Sizun
- Université Paris-Sud, Laboratoire des Collisions Atomiques et Moléculaires, UMR8625, Orsay, F-91405, France, and CNRS, Laboratoire des Collisions Atomiques et Moléculaires, UMR8625, Orsay, F-91405, France
| | - F. Aguillon
- Université Paris-Sud, Laboratoire des Collisions Atomiques et Moléculaires, UMR8625, Orsay, F-91405, France, and CNRS, Laboratoire des Collisions Atomiques et Moléculaires, UMR8625, Orsay, F-91405, France
| | - V. Sidis
- Université Paris-Sud, Laboratoire des Collisions Atomiques et Moléculaires, UMR8625, Orsay, F-91405, France, and CNRS, Laboratoire des Collisions Atomiques et Moléculaires, UMR8625, Orsay, F-91405, France
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Xu M, Sebastianelli F, Bačić Z. Quantum dynamics of H2, D2, and HD in the small dodecahedral cage of clathrate hydrate: Evaluating H2-water nanocage interaction potentials by comparison of theory with inelastic neutron scattering experiments. J Chem Phys 2008; 128:244715. [DOI: 10.1063/1.2945895] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Amiaud L, Momeni A, Dulieu F, Fillion JH, Matar E, Lemaire JL. Measurement of the adsorption energy difference between ortho- and para-D2 on an amorphous ice surface. PHYSICAL REVIEW LETTERS 2008; 100:056101. [PMID: 18352393 DOI: 10.1103/physrevlett.100.056101] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2007] [Indexed: 05/26/2023]
Abstract
Molecular hydrogen interaction on water ice surfaces is a major process taking place in interstellar dense clouds. By coupling laser detection and classical thermal desorption spectroscopy, it is possible to study the effect of rotation of D(2) on adsorption on amorphous solid water ice surfaces. The desorption profiles of ortho- and para-D(2) are different. This difference is due to a shift in the adsorption energy distribution of the two lowest rotational states. Molecules in J''=1 rotational state are on average more strongly bound to the ice surface than those in J''=0 rotational state. This energy difference is estimated to be 1.4+/-0.3 meV. This value is in agreement with previous calculation and interpretation. The nonspherical wave function J'' =1 has an interaction with the asymmetric part of the adsorption potential and contributes positively in the binding energy.
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Affiliation(s)
- L Amiaud
- LERMA, UMR8112 du CNRS, de l'Observatoire de Paris et de l'Université de Cergy Pontoise, 5 mail Gay Lussac, 95031 Cergy Pontoise Cedex, France
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Vidali G, Pirronello V, Li L, Roser J, Manicó G, Congiu E, Mehl H, Lederhendler A, Perets HB, Brucato JR, Biham O. Analysis of Molecular Hydrogen Formation on Low-Temperature Surfaces in Temperature Programmed Desorption Experiments. J Phys Chem A 2007; 111:12611-9. [DOI: 10.1021/jp0760657] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- G. Vidali
- Physics Department, Syracuse University, Syracuse, New York 13244, Universitá di Catania, DMFCI, 95125 Catania, Sicily, Italy, NASA Ames, Mail Stop 245-6, Moffett Field, California 94035, Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel, Faculty of Physics, Weizmann Institute of Science, Rehovot 76100, Israel, and INAF-Osservatorio Astronomico di Capodimonte, Napoli, Italy
| | - V. Pirronello
- Physics Department, Syracuse University, Syracuse, New York 13244, Universitá di Catania, DMFCI, 95125 Catania, Sicily, Italy, NASA Ames, Mail Stop 245-6, Moffett Field, California 94035, Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel, Faculty of Physics, Weizmann Institute of Science, Rehovot 76100, Israel, and INAF-Osservatorio Astronomico di Capodimonte, Napoli, Italy
| | - L. Li
- Physics Department, Syracuse University, Syracuse, New York 13244, Universitá di Catania, DMFCI, 95125 Catania, Sicily, Italy, NASA Ames, Mail Stop 245-6, Moffett Field, California 94035, Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel, Faculty of Physics, Weizmann Institute of Science, Rehovot 76100, Israel, and INAF-Osservatorio Astronomico di Capodimonte, Napoli, Italy
| | - J. Roser
- Physics Department, Syracuse University, Syracuse, New York 13244, Universitá di Catania, DMFCI, 95125 Catania, Sicily, Italy, NASA Ames, Mail Stop 245-6, Moffett Field, California 94035, Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel, Faculty of Physics, Weizmann Institute of Science, Rehovot 76100, Israel, and INAF-Osservatorio Astronomico di Capodimonte, Napoli, Italy
| | - G. Manicó
- Physics Department, Syracuse University, Syracuse, New York 13244, Universitá di Catania, DMFCI, 95125 Catania, Sicily, Italy, NASA Ames, Mail Stop 245-6, Moffett Field, California 94035, Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel, Faculty of Physics, Weizmann Institute of Science, Rehovot 76100, Israel, and INAF-Osservatorio Astronomico di Capodimonte, Napoli, Italy
| | - E. Congiu
- Physics Department, Syracuse University, Syracuse, New York 13244, Universitá di Catania, DMFCI, 95125 Catania, Sicily, Italy, NASA Ames, Mail Stop 245-6, Moffett Field, California 94035, Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel, Faculty of Physics, Weizmann Institute of Science, Rehovot 76100, Israel, and INAF-Osservatorio Astronomico di Capodimonte, Napoli, Italy
| | - H. Mehl
- Physics Department, Syracuse University, Syracuse, New York 13244, Universitá di Catania, DMFCI, 95125 Catania, Sicily, Italy, NASA Ames, Mail Stop 245-6, Moffett Field, California 94035, Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel, Faculty of Physics, Weizmann Institute of Science, Rehovot 76100, Israel, and INAF-Osservatorio Astronomico di Capodimonte, Napoli, Italy
| | - A. Lederhendler
- Physics Department, Syracuse University, Syracuse, New York 13244, Universitá di Catania, DMFCI, 95125 Catania, Sicily, Italy, NASA Ames, Mail Stop 245-6, Moffett Field, California 94035, Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel, Faculty of Physics, Weizmann Institute of Science, Rehovot 76100, Israel, and INAF-Osservatorio Astronomico di Capodimonte, Napoli, Italy
| | - H. B. Perets
- Physics Department, Syracuse University, Syracuse, New York 13244, Universitá di Catania, DMFCI, 95125 Catania, Sicily, Italy, NASA Ames, Mail Stop 245-6, Moffett Field, California 94035, Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel, Faculty of Physics, Weizmann Institute of Science, Rehovot 76100, Israel, and INAF-Osservatorio Astronomico di Capodimonte, Napoli, Italy
| | - J. R. Brucato
- Physics Department, Syracuse University, Syracuse, New York 13244, Universitá di Catania, DMFCI, 95125 Catania, Sicily, Italy, NASA Ames, Mail Stop 245-6, Moffett Field, California 94035, Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel, Faculty of Physics, Weizmann Institute of Science, Rehovot 76100, Israel, and INAF-Osservatorio Astronomico di Capodimonte, Napoli, Italy
| | - O. Biham
- Physics Department, Syracuse University, Syracuse, New York 13244, Universitá di Catania, DMFCI, 95125 Catania, Sicily, Italy, NASA Ames, Mail Stop 245-6, Moffett Field, California 94035, Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel, Faculty of Physics, Weizmann Institute of Science, Rehovot 76100, Israel, and INAF-Osservatorio Astronomico di Capodimonte, Napoli, Italy
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34
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Barzel B, Biham O. Efficient stochastic simulations of complex reaction networks on surfaces. J Chem Phys 2007; 127:144703. [DOI: 10.1063/1.2789417] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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35
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Amiaud L, Dulieu F, Fillion JH, Momeni A, Lemaire JL. Interaction of atomic and molecular deuterium with a nonporous amorphous water ice surface between 8 and 30K. J Chem Phys 2007; 127:144709. [DOI: 10.1063/1.2746323] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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36
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Islam F, Latimer ER, Price SD. The formation of vibrationally excited HD from atomic recombination on cold graphite surfaces. J Chem Phys 2007; 127:064701. [PMID: 17705615 DOI: 10.1063/1.2754684] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
HD molecules formed in v"=3 and v"=4 have been detected by laser spectroscopy when a cold (15 K) graphite surface is irradiated with H and D atoms. Population of the v"=3, J"=0-6 and v"=4, J"=0-6 levels has been detected and the average rotational temperatures of the nascent HD were determined. These results are compared with previous data collected for the formation of HD in v"=1 and 2 under similar conditions. This comparison indicates that the nascent HD flux increases with increasing vibrational quantum number for v"=1-4.
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Affiliation(s)
- Farahjabeen Islam
- Chemistry Department, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
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