1
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Bianchini RH, Roman MJ, Costen ML, McKendrick KG. Real-space laser-induced fluorescence imaging applied to gas-liquid interfacial scattering. J Chem Phys 2019. [DOI: 10.1063/1.5110517] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Robert H. Bianchini
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| | - Maksymilian J. Roman
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| | - Matthew L. Costen
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| | - Kenneth G. McKendrick
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
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2
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Ohoyama H, Teramoto T. Initial dissolution of D 2O at the gas-liquid interface of the ionic liquid [C 4min][NTf2] associated with hydrogen-bond network formation. Phys Chem Chem Phys 2016; 18:28061-28068. [PMID: 27711407 DOI: 10.1039/c6cp03448a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have studied the initial dissolution of D2O at the interfacial surface of the flowing jet sheet beam of the ionic liquid (IL) [C4min][NTf2] using the King and Wells method as a function of both the temperature and collision energy of the IL. The initial dissolution probability of D2O into the IL [C4min][NTf2] was found to follow the general propensity that the solubility of gases into a liquid decreases with temperature. However, a large partial molar enthalpy and entropy for the initial dissolution of D2O in the IL [C4min][NTf2] were observed from the temperature dependence of the initial dissolution probability: ΔHl = -53 ± 8 kJ mol-1, ΔSl = -210 ± 30 J mol-1 K-1. In addition, it was found that the collision energy significantly reduced the initial dissolution probability. We propose that the associated D2O molecules at the interface of the IL [C4min][NTf2] make a hydrogen-bond network around the [NTf2]- anion before dissolution into the deeper portion of the interface layer.
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Affiliation(s)
- H Ohoyama
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.
| | - T Teramoto
- Department of Electrical & Electronic Engineering, College of Science & Engineering, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
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3
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Tesa-Serrate MA, Smoll EJ, Minton TK, McKendrick KG. Atomic and Molecular Collisions at Liquid Surfaces. Annu Rev Phys Chem 2016; 67:515-40. [PMID: 27090845 DOI: 10.1146/annurev-physchem-040215-112355] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The gas-liquid interface remains one of the least explored, but nevertheless most practically important, environments in which molecular collisions take place. These molecular-level processes underlie many bulk phenomena of fundamental and applied interest, spanning evaporation, respiration, multiphase catalysis, and atmospheric chemistry. We review here the research that has, during the past decade or so, been unraveling the molecular-level mechanisms of inelastic and reactive collisions at the gas-liquid interface. Armed with the knowledge that such collisions with the outer layers of the interfacial region can be unambiguously distinguished, we show that the scattering of gas-phase projectiles is a promising new tool for the interrogation of liquid surfaces with extreme surface sensitivity. Especially for reactive scattering, this method also offers absolute chemical selectivity for the groups that react to produce a specific observed product.
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Affiliation(s)
- Maria A Tesa-Serrate
- Institute of Chemical Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom;
| | - Eric J Smoll
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717;
| | - Timothy K Minton
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717;
| | - Kenneth G McKendrick
- Institute of Chemical Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom;
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4
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Tesa-Serrate MA, King KL, Paterson G, Costen ML, McKendrick KG. Site and bond-specific dynamics of reactions at the gas–liquid interface. Phys Chem Chem Phys 2014; 16:173-83. [DOI: 10.1039/c3cp54107j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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5
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King KL, Paterson G, Rossi GE, Iljina M, Westacott RE, Costen ML, McKendrick KG. Inelastic scattering of OH radicals from organic liquids: isolating the thermal desorption channel. Phys Chem Chem Phys 2013; 15:12852-63. [DOI: 10.1039/c3cp51708j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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6
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7
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Li X, Schatz GC, Nesbitt DJ. Anion Effects in the Scattering of CO2 from the Room-Temperature Ionic Liquids [bmim][BF4] and [bmim][Tf2N]: Insights from Quantum Mechanics/Molecular Mechanics Trajectories. J Phys Chem B 2012; 116:3587-602. [DOI: 10.1021/jp2123357] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiaohu Li
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston,
Illinois 60208-3113, United States
| | - George C. Schatz
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston,
Illinois 60208-3113, United States
| | - David J. Nesbitt
- JILA, Campus Box 440, University of Colorado, Boulder, Colorado 80309-0440,
United States
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8
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Gisler AW, Nesbitt DJ. On probing ions at the gas–liquid interface by quantum state-resolved molecular beam scattering: the curious incident of the cation in the night time. Faraday Discuss 2012; 157:297-305; discussion 375-98. [PMID: 23230774 DOI: 10.1039/c2fd20026k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Andrew W Gisler
- National Institute of Standards and Technology, Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0440, USA
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9
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Fleischer S, Zhou Y, Field RW, Nelson KA. Molecular orientation and alignment by intense single-cycle THz pulses. PHYSICAL REVIEW LETTERS 2011; 107:163603. [PMID: 22107382 DOI: 10.1103/physrevlett.107.163603] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Indexed: 05/13/2023]
Abstract
Intense single-cycle THz pulses resonantly interacting with molecular rotations are shown to induce field-free orientation and alignment under ambient conditions. We calculate and measure the degree of both orientation and alignment induced by the THz field in an OCS gas sample, and correlate between the two observables. The data presents the first observation of THz-induced molecular alignment in the gas phase.
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Affiliation(s)
- Sharly Fleischer
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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10
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Ziemkiewicz MP, Roscioli JR, Nesbitt DJ. State-to-state dynamics at the gas-liquid metal interface: Rotationally and electronically inelastic scattering of NO[2Π1/2(0.5)] from molten gallium. J Chem Phys 2011; 134:234703. [DOI: 10.1063/1.3591180] [Citation(s) in RCA: 14] [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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11
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Lu JW, Morris JR. Gas–Surface Scattering Dynamics of CO2, NO2, and O3in Collisions with Model Organic Surfaces. J Phys Chem A 2011; 115:6194-201. [DOI: 10.1021/jp111395z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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12
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Lu JW, Alexander WA, Morris JR. Gas–surface energy exchange and thermal accommodation of CO2 and Ar in collisions with methyl, hydroxyl, and perfluorinated self-assembled monolayers. Phys Chem Chem Phys 2010; 12:12533-43. [DOI: 10.1039/b921893a] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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13
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Perkins, Jr. BG, Nesbitt DJ. High resolution Dopplerimetry of correlated angular and quantum state-resolved CO2 scattering dynamics at the gas–liquid interface. Phys Chem Chem Phys 2010; 12:14294-308. [DOI: 10.1039/c0cp00578a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Perkins BG, Nesbitt DJ. Stereodynamics at the Gas−Liquid Interface: Orientation and Alignment of CO2 Scattered from Perfluorinated Liquid Surfaces. J Phys Chem A 2009; 114:1398-410. [DOI: 10.1021/jp907022u] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bradford G. Perkins
- JILA, University of Colorado and National Institute of Standards and Technology, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0440
| | - David J. Nesbitt
- JILA, University of Colorado and National Institute of Standards and Technology, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0440
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15
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Behr P, Scharfenort U, Zellner R. Collisions of noble gases with supercooled sulfuric acid-water solutions. Phys Chem Chem Phys 2009; 11:7292-302. [PMID: 19672541 DOI: 10.1039/b821751c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The collisions of hyperthermal noble gases (He, Ne, Ar, Kr, Xe) with supercooled binary sulfuric acid-water mixtures (57-77 wt%) were explored in the temperature range between 210 and 240 K. The experiments were performed by directing a molecular beam of the respective gases onto a continuously renewed liquid surface and monitoring the velocity of the scattered molecules by mass spectrometry. Depending on the initial translational energies and molecular masses, we observe both inelastic scattering from the surface as well as thermalization followed by subsequent desorption. The experiments indicate that the repulsive momentum transfer in the inelastic scattering channel increases with increasing mass of the impinging gas, while it is only weakly affected by the initial velocities. The final energy of the thermally desorbing atoms can always be approximated by a Maxwell-Boltzmann distribution equal to the liquid bulk phase temperature. The influence of the binary composition of the liquid phase is only noticeable in the case of Ne, whilst this dependence diminishes for gases with molecular masses >or=40 amu. The probability of thermalisation relative to inelastic scattering increases with the bulk phase temperature, independent of the molecular masses of the colliding gas. In contrast, the fractional energy transfer during collision does not increase with temperature, except for Neon. These results can be interpreted in the model framework of hard-sphere collisions of noble gases with the surface, during which water and sulfuric acid molecules interact independently with the impinging gas.
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Affiliation(s)
- Peter Behr
- Institute of Physical and Theoretical Chemistry, University of Duisburg-Essen, Essen, Germany
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16
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Perkins BG, Nesbitt DJ. Toward Three-Dimensional Quantum State-Resolved Collision Dynamics at the Gas−Liquid Interface: Theoretical Investigation of Incident Angle. J Phys Chem A 2009; 113:4613-25. [DOI: 10.1021/jp811322y] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bradford G. Perkins
- JILA, University of Colorado and National Institute of Standards and Technology, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0440
| | - David J. Nesbitt
- JILA, University of Colorado and National Institute of Standards and Technology, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0440
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17
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Waring C, Bagot PAJ, Räisänen MT, Costen ML, McKendrick KG. Dynamics of the Reaction of O(3P) Atoms with Alkylthiol Self-assembled Monolayers. J Phys Chem A 2009; 113:4320-9. [DOI: 10.1021/jp8109868] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Carla Waring
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K. and School of Chemistry, University of St. Andrews, St. Andrews, Fife KY16 9ST, U.K
| | - Paul A. J. Bagot
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K. and School of Chemistry, University of St. Andrews, St. Andrews, Fife KY16 9ST, U.K
| | - Minna T. Räisänen
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K. and School of Chemistry, University of St. Andrews, St. Andrews, Fife KY16 9ST, U.K
| | - Matthew L. Costen
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K. and School of Chemistry, University of St. Andrews, St. Andrews, Fife KY16 9ST, U.K
| | - Kenneth G. McKendrick
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K. and School of Chemistry, University of St. Andrews, St. Andrews, Fife KY16 9ST, U.K
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18
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Alexander WA, Morris JR, Troya D. Experimental and theoretical study of CO collisions with CH3- and CF3-terminated self-assembled monolayers. J Chem Phys 2009; 130:084702. [DOI: 10.1063/1.3072012] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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19
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Alexander WA, Morris JR, Troya D. Theoretical Study of the Stereodynamics of CO Collisions with CH3- and CF3-Terminated Alkanethiolate Self-Assembled Monolayers. J Phys Chem A 2009; 113:4155-67. [DOI: 10.1021/jp810557m] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - John R. Morris
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061-0212
| | - Diego Troya
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061-0212
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20
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Nogueira JJ, Vázquez SA, Mazyar OA, Hase WL, Perkins BG, Nesbitt DJ, Martínez-Núñez E. Dynamics of CO2 Scattering off a Perfluorinated Self-Assembled Monolayer. Influence of the Incident Collision Energy, Mass Effects, and Use of Different Surface Models. J Phys Chem A 2009; 113:3850-65. [DOI: 10.1021/jp809756f] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Juan J. Nogueira
- Departamento de Química Física, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain, Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, and JILA, University of Colorado, and National Institute of Standards and Technology, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0440
| | - Saulo A. Vázquez
- Departamento de Química Física, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain, Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, and JILA, University of Colorado, and National Institute of Standards and Technology, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0440
| | - Oleg A. Mazyar
- Departamento de Química Física, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain, Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, and JILA, University of Colorado, and National Institute of Standards and Technology, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0440
| | - William L. Hase
- Departamento de Química Física, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain, Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, and JILA, University of Colorado, and National Institute of Standards and Technology, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0440
| | - Bradford G. Perkins
- Departamento de Química Física, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain, Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, and JILA, University of Colorado, and National Institute of Standards and Technology, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0440
| | - David J. Nesbitt
- Departamento de Química Física, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain, Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, and JILA, University of Colorado, and National Institute of Standards and Technology, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0440
| | - Emilio Martínez-Núñez
- Departamento de Química Física, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain, Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, and JILA, University of Colorado, and National Institute of Standards and Technology, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0440
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21
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Zolot AM, Dagdigian PJ, Nesbitt DJ. Quantum-state resolved reactive scattering at the gas-liquid interface: F+squalane (C30H62) dynamics via high-resolution infrared absorption of nascent HF(v,J). J Chem Phys 2008; 129:194705. [DOI: 10.1063/1.2973630] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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22
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Perkins BG, Nesbitt DJ. Correlated Angular and Quantum State-Resolved CO2 Scattering Dynamics at the Gas−Liquid Interface. J Phys Chem A 2008; 112:9324-35. [DOI: 10.1021/jp8022887] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bradford G. Perkins
- JILA, University of Colorado and National Institute of Standards and Technology, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0440
| | - David J. Nesbitt
- JILA, University of Colorado and National Institute of Standards and Technology, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0440
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23
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Perkins BG, Nesbitt DJ. Stereodynamics in state-resolved scattering at the gas-liquid interface. Proc Natl Acad Sci U S A 2008; 105:12684-9. [PMID: 18678907 PMCID: PMC2529048 DOI: 10.1073/pnas.0800401105] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2008] [Indexed: 11/18/2022] Open
Abstract
Stereodynamics at the gas-liquid interface provides insight into the important physical interactions that directly influence heterogeneous chemistry at the surface and within the bulk liquid. We investigate molecular beam scattering of CO(2) from a liquid perfluoropolyether (PFPE) surface in vacuum [incident energy E(inc) = 10.6(8) kcal/mol, incident angle theta(inc) = 60 degrees] to specifically reveal rotational angular-momentum directions for scattered molecules. Experimentally, internal quantum state populations and M(J) distributions are probed by high-resolution polarization-modulated infrared laser spectroscopy. Analysis of J-state populations reveals dual-channel scattering dynamics characterized by a two-temperature Boltzmann distribution for trapping-desorption and impulsive scattering. In addition, molecular dynamics simulations of CO(2) + fluorinated self-assembled monolayers have been used to model CO(2) + PFPE dynamics. Experimental results and molecular dynamics simulations reveal highly oriented CO(2) distributions that preferentially scatter with "top spin" as a strongly increasing function of J state.
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Affiliation(s)
- Bradford G. Perkins
- JILA, University of Colorado and National Institute of Standards and Technology, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309-0440
| | - David J. Nesbitt
- JILA, University of Colorado and National Institute of Standards and Technology, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309-0440
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24
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Crim FF. Chemical dynamics of vibrationally excited molecules: Controlling reactions in gases and on surfaces. Proc Natl Acad Sci U S A 2008; 105:12654-61. [PMID: 18765816 PMCID: PMC2529117 DOI: 10.1073/pnas.0803010105] [Citation(s) in RCA: 134] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2008] [Indexed: 11/18/2022] Open
Abstract
Experimental studies of the chemical reaction dynamics of vibrationally excited molecules reveal the ability of different vibrations to control the course of a reaction. This Perspective describes those studies for the prototypical reaction of vibrationally excited methane and its isotopologues in gases and on surfaces and looks to the prospects of similar studies in liquids. The influences of vibrational excitation on the C-H bond cleavage in a single collision reaction with Cl and in dissociative adsorption on a Ni surface bear some striking similarities. Both reactions are bond-selective processes in which the initial preparation of a molecular eigenstate containing a large component of C-H stretching results in preferential cleavage of that bond. It is possible to cleave either the C-H bond or C-D bond in the reaction of Cl with CH3D, CH2D2, or CHD3 and, similarly, to use initial excitation of the C-H stretch to promote dissociation of CHD3 to CD3 and H on a Ni surface. Different vibrational modes, such as the symmetric and antisymmetric stretches in CH3D or CH4, lead to very different reactivities, and molecules with the symmetric stretching vibration excited can be as much as 10 times more reactive than ones with the antisymmetric stretch excited. The origin of this behavior lies in the change in the vibrational motion induced by the interaction with the atomic reaction partner or the surface.
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Affiliation(s)
- F Fleming Crim
- Department of Chemistry, University of Wisconsin, Madison, WI 53706, USA.
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25
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Perkins BG, Nesbitt DJ. Quantum state-resolved CO2 collisions at the gas-liquid interface: surface temperature-dependent scattering dynamics. J Phys Chem B 2008; 112:507-19. [PMID: 18052277 DOI: 10.1021/jp077488b] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Energy transfer dynamics at the gas-liquid interface are investigated as a function of surface temperature both by experimental studies of CO2 + perfluorinated polyether (PFPE) and by molecular dynamics simulations of CO2 + fluorinated self-assembled monolayers (F-SAMs). Using a normal incident molecular beam, the experimental studies probe scattered CO2 internal-state and translational distributions with high resolution infrared spectroscopy. At low incident energies [Einc = 1.6(1) kcal/mol], CO2 J-state populations and transverse Doppler velocity distributions are characteristic of the surface temperature (Trot approximately Ttrans approximately TS) over the range from 232 to 323 K. In contrast, the rotational and translational distributions at high incident energies [Einc = 10.6(8) kcal/mol] show evidence for both trapping-desorption (TD) and impulsive scattering (IS) events. Specifically, the populations are surprisingly well-characterized by a sum of Boltzmann distributions where the two components include one (TD) that equilibrates with the surface (TTD approximately TS) and a second (IS) that is much hotter than the surface temperature (TIS > TS). Support for the superthermal, yet Boltzmann, nature of the IS channel is provided by molecular dynamics (MD) simulations of CO2 + F-SAMs [Einc = 10.6 kcal/mol], which reveal two-temperature distributions, sticking probabilities, and angular distributions in near quantitative agreement with the experimental PFPE results. Finally, experiments as a function of surface temperature reveal an increase in both sticking probability and rotational/translational temperature of the IS component. Such a trend is consistent with increased surface roughness at higher surface temperature, which increases the overall probability of trapping, yet preferentially leads to impulsive scattering of more highly internally excited CO2 from the surface.
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Affiliation(s)
- Bradford G Perkins
- JILA, University of Colorado and National Institute of Standards and Technology, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0440, USA
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26
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Vázquez SA, Morris JR, Rahaman A, Mazyar OA, Vayner G, Addepalli SV, Hase WL, Martínez-Núñez E. Inelastic Scattering Dynamics of Ar from a Perfluorinated Self-Assembled Monolayer Surface. J Phys Chem A 2007; 111:12785-94. [DOI: 10.1021/jp076431m] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Saulo A. Vázquez
- Departamento de Química Física, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain, Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, and High Performance Computing Center, Texas Tech University, Lubbock, Texas 79409
| | - John R. Morris
- Departamento de Química Física, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain, Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, and High Performance Computing Center, Texas Tech University, Lubbock, Texas 79409
| | - Asif Rahaman
- Departamento de Química Física, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain, Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, and High Performance Computing Center, Texas Tech University, Lubbock, Texas 79409
| | - Oleg A. Mazyar
- Departamento de Química Física, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain, Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, and High Performance Computing Center, Texas Tech University, Lubbock, Texas 79409
| | - Grigoriy Vayner
- Departamento de Química Física, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain, Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, and High Performance Computing Center, Texas Tech University, Lubbock, Texas 79409
| | - Srirangam V. Addepalli
- Departamento de Química Física, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain, Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, and High Performance Computing Center, Texas Tech University, Lubbock, Texas 79409
| | - William L. Hase
- Departamento de Química Física, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain, Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, and High Performance Computing Center, Texas Tech University, Lubbock, Texas 79409
| | - Emilio Martínez-Núñez
- Departamento de Química Física, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain, Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, and High Performance Computing Center, Texas Tech University, Lubbock, Texas 79409
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