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Qureishy T, Løyland S, Jørgensen SJ, Færgestad EM, Norby T, Uggerud E. Mechanisms for sonochemical oxidation of nitrogen. Phys Chem Chem Phys 2022; 24:15357-15364. [PMID: 35703372 DOI: 10.1039/d2cp01995g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
N2O, and mixtures of N2 and O2, dissolved in water-both in the presence and absence of added noble gases-have been subjected to ultrasonication with quantification of nitrite and nitrate products. Significant increase in product formation upon adding noble gas for both reactant systems is observed, with the reactivity order Ne < Ar < Kr < Xe. These observations lend support to the idea that extraordinarily high electronic and vibrational temperatures arise under these conditions. This is based on recent observations of sonoluminescence in the presence of noble gases and is inconsistent with the classical picture of adiabatic bubble collapse upon acoustic cavitation. The reaction mechanisms of the first few reaction steps necessary for the critical formation of NO are discussed, illustrated by quantum chemical calculations. The role of intermediate N2O in this series of elementary steps is also discussed to better understand the difference between the two reactant sources (N2O and 2 : 1 N2 : O2; same stoichiometry).
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Affiliation(s)
- Thomas Qureishy
- Department of Chemistry, University of Oslo, Norway. .,Centre for Materials Science and Nanotechnology, University of Oslo, Norway
| | - Sverre Løyland
- Department of Chemistry, University of Oslo, Norway. .,Hylleraas Centre for Quantum Molecular Sciences, University of Oslo, Norway
| | - Susanne J Jørgensen
- Department of Chemistry, University of Oslo, Norway. .,Centre for Biogeochemistry in the Anthropocene, University of Oslo, Norway
| | - Eline M Færgestad
- Department of Chemistry, University of Oslo, Norway. .,Centre for Biogeochemistry in the Anthropocene, University of Oslo, Norway
| | - Truls Norby
- Department of Chemistry, University of Oslo, Norway. .,Centre for Materials Science and Nanotechnology, University of Oslo, Norway
| | - Einar Uggerud
- Department of Chemistry, University of Oslo, Norway. .,Hylleraas Centre for Quantum Molecular Sciences, University of Oslo, Norway
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2
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Zang X, Ueno Y, Kitadai N. Photochemical Synthesis of Ammonia and Amino Acids from Nitrous Oxide. ASTROBIOLOGY 2022; 22:387-398. [PMID: 35196128 DOI: 10.1089/ast.2021.0064] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Abiotic synthesis of ammonia (NH3) and amino acids is important for the origin of life and early evolution. Ammonia and organic nitrogen species may be produced from nitrous oxide (N2O), which is a second abundant nitrogen species in the atmosphere. Here, we report a new photochemical experiment and evaluate whether N2O can be used as a nitrogen source for prebiotic synthesis in the atmosphere. We conducted a series of experiments by using a gas mixture of N2O+CO, N2O+CO2, or N2O + H2 in the presence of liquid water. The results demonstrate that NH3, methylamine (CH3NH2), and some amino acids such as glycine, alanine, and serine can be synthesized through photochemistry from N2O even without metal catalysts. NH3 can be produced not only from CO + N2O, but also from H2+N2O. Glycine can be synthesized from CH3NH2 and CO2, which can be produced from N2O and CO under ultraviolet irradiation. Our work demonstrates, for the first time, that N2O could be an important nitrogen source and provide a new process for synthesizing ammonia and organic nitrogen species, which has not been previously considered. The contribution of organic synthesis from N2O should, therefore, be considered when discussing the prebiotic chemistry on primitive Earth.
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Affiliation(s)
- Xiaofeng Zang
- Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Tokyo, Japan
| | - Yuichiro Ueno
- Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Tokyo, Japan
- Earth-Life Science Institute (WPI-ELSI), Tokyo Institute of Technology, Tokyo, Japan
- Super-cutting-edge Grand and Advanced Research (SUGAR) Program, Institute for Extra-cutting-edge Science and Technology Avant-garde Research (X-star), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan
| | - Norio Kitadai
- Super-cutting-edge Grand and Advanced Research (SUGAR) Program, Institute for Extra-cutting-edge Science and Technology Avant-garde Research (X-star), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan
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3
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Xu J, Fang J, Li J, Yue X. Theoretical rate constants and stereodynamics for the O + N2 collision. Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2021.138426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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4
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Mutunga FM, Olenyik KM, Strom AI, Anderson DT. Hydrogen atom quantum diffusion in solid parahydrogen: The H + N 2O → cis-HNNO → trans-HNNO reaction. J Chem Phys 2021; 154:014302. [PMID: 33412886 DOI: 10.1063/5.0028853] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The diffusion and reactivity of hydrogen atoms in solid parahydrogen at temperatures between 1.5 K and 4.3 K are investigated by high-resolution infrared spectroscopy. Hydrogen atoms are produced within solid parahydrogen as the by-products of the 193 nm in situ photolysis of N2O, which induces a two-step tunneling reaction, H + N2O → cis-HNNO → trans-HNNO. The second-order rate constant for the first step to form cis-HNNO is found to be inversely proportional to the N2O concentration after photolysis, indicating that the hydrogen atoms move through solid parahydrogen via quantum diffusion. This reaction only readily occurs at temperatures below 2.8 K, not due to an increased rate constant for the first reaction step at low temperatures but rather due to an increased selectivity to the reaction. The rate constant for the second step of the reaction mechanism involving unimolecular isomerization is shown to be independent of the N2O concentration as expected. The inverse concentration dependence of the rate constant for the reaction step that involves the hydrogen atom demonstrates clearly that quantum diffusion influences the reactivity of the hydrogen atoms in solid parahydrogen, which does not have an analogy in classical reaction kinetics.
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Affiliation(s)
| | - Kelly M Olenyik
- Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071, USA
| | - Aaron I Strom
- Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071, USA
| | - David T Anderson
- Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071, USA
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5
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Yuan D, Yu S, Xie T, Chen W, Wang S, Tan Y, Wang T, Yuan K, Yang X, Wang X. Photodissociation Dynamics of Nitrous Oxide near 145 nm: The O( 1S 0) and O( 3P J=2,1,0) Product Channels. J Phys Chem A 2018; 122:2663-2669. [PMID: 29481080 DOI: 10.1021/acs.jpca.7b10756] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report the study of photodissociation dynamics of nitrous oxide in the vacuum ultraviolet region, using the time-sliced velocity map ion imaging technique. Ion images of the O(1S0) and O(3P J=2,1,0) products were measured at nine photolysis wavelengths from 142.55 to 148.79 nm. The product channels O(1S0) + N2(X1Σg+) and O(3P J=2,1,0) + N2(A3Σu+) have been observed. For these dissociation channels, the total kinetic energy releases of the dissociated products were acquired. With vibrational structures of the N2 coproducts partially resolved in the experimental images, the branching ratios of different vibrational states of the N2 coproducts were determined, and the vibrational state specific anisotropy parameters (β values) were derived. Analysis shows that the O(1S0) + N2(X1Σg+) channel is primarily formed via nonadiabatic couplings between the C (1Π) state and the higher-lying D (1Σ+) state of the N2O. A moderate rotational excitation and high vibrational excitation of N2(X1Σg+) products have been observed through this pathway. On the other hand, for the O(3P J=2,1,0) + N2(A3Σu+) channels, where a slightly higher rotational excitation of N2 coproducts have been observed, the possible pathway would be via nonadiabatic couplings from the C (1Π) state to the lower-lying A(1Σ-)state.
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Affiliation(s)
- Daofu Yuan
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) , University of Science and Technology of China . Jinzhai Road 96 , Hefei , Anhui 230026 , P. R. China
| | - Shengrui Yu
- Hangzhou Institute of Advanced Studies , Zhejiang Normal University , Gengwen Road 1108 , Hangzhou , Zhejiang 311231 , P. R. China
| | - Ting Xie
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) , University of Science and Technology of China . Jinzhai Road 96 , Hefei , Anhui 230026 , P. R. China
| | - Wentao Chen
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) , University of Science and Technology of China . Jinzhai Road 96 , Hefei , Anhui 230026 , P. R. China
| | - Siwen Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) , University of Science and Technology of China . Jinzhai Road 96 , Hefei , Anhui 230026 , P. R. China
| | - Yuxin Tan
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) , University of Science and Technology of China . Jinzhai Road 96 , Hefei , Anhui 230026 , P. R. China
| | - Tao Wang
- State Key Laboratory of Molecular Reaction Dynamics , Dalian Institute of Chemical Physics, Chinese Academy of Sciences . Zhongshan Road 457 , Dalian , Liaoning 116023 , P. R. China
| | - Kaijun Yuan
- State Key Laboratory of Molecular Reaction Dynamics , Dalian Institute of Chemical Physics, Chinese Academy of Sciences . Zhongshan Road 457 , Dalian , Liaoning 116023 , P. R. China
| | - Xueming Yang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) , University of Science and Technology of China . Jinzhai Road 96 , Hefei , Anhui 230026 , P. R. China.,State Key Laboratory of Molecular Reaction Dynamics , Dalian Institute of Chemical Physics, Chinese Academy of Sciences . Zhongshan Road 457 , Dalian , Liaoning 116023 , P. R. China
| | - Xingan Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) , University of Science and Technology of China . Jinzhai Road 96 , Hefei , Anhui 230026 , P. R. China
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6
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Sofikitis D, Suarez J, Schmidt JA, Rakitzis TP, Farantos SC, Janssen MHM. Recoil Inversion in the Photodissociation of Carbonyl Sulfide near 234 nm. PHYSICAL REVIEW LETTERS 2017; 118:253001. [PMID: 28696737 DOI: 10.1103/physrevlett.118.253001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Indexed: 06/07/2023]
Abstract
We report the observation of recoil inversion of the CO (v=0, J_{CO}=66) state in the UV dissociation of lab-frame oriented carbonyl sulfide (OCS). This state is ejected in the opposite direction with respect to all other (>30) states and in absence of any OCS rotation, thus resulting in spatial filtering of this particular high-J rovibrational state. This inversion is caused by resonances occurring in shallow local minima of the molecular potential, which bring the sulfur closer to the oxygen than the carbon atom, and is a striking example where such subtleties severely modify the photofragment trajectories. The resonant behavior is observed only in the photofragment trajectories and not in their population, showing that stereodynamic measurements from oriented molecules offer an indispensable probe for exploring energy landscapes.
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Affiliation(s)
- Dimitris Sofikitis
- LaserLaB Amsterdam, Vrije Universiteit, de Boelelaan 1081, 1081 HV Amsterdam, Netherlands
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 71110 Heraklion-Crete, Greece
| | - Jaime Suarez
- Departamento de Qumica, Modulo 13, Universidad Autonoma de Madrid, Cantoblanco 28049, Madrid, Spain
| | - Johan A Schmidt
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | - T Peter Rakitzis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 71110 Heraklion-Crete, Greece
- Department of Physics, University of Crete, 70013 Heraklion-Crete, Greece
| | - Stavros C Farantos
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 71110 Heraklion-Crete, Greece
- Department of Chemistry, University of Crete, 70013 Heraklion-Crete, Greece
| | - Maurice H M Janssen
- LaserLaB Amsterdam, Vrije Universiteit, de Boelelaan 1081, 1081 HV Amsterdam, Netherlands
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7
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Lin W, Varga Z, Song G, Paukku Y, Truhlar DG. Global triplet potential energy surfaces for the N2(X(1)Σ) + O((3)P) → NO(X(2)Π) + N((4)S) reaction. J Chem Phys 2016; 144:024309. [PMID: 26772573 DOI: 10.1063/1.4938241] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
This work presents two global triplet potential energy surfaces (PESs) for the high-energy reaction N2(X(1)Σ) + O((3)P) → NO(X(2)Π) + N((4)S)-in particular, for the lowest energy (3)A' and (3)A″ PESs. In order to obtain the energies needed for fitting analytic surfaces, we carried out multireference configuration interaction (MRCI) calculations based on wave functions obtained from state-averaged complete active space self-consistent field calculations for 2280 geometries for the three lowest (3)A″ states and for 2298 geometries for the three lowest (3)A' states. The lowest-energy (3)A' and (3)A″ states at each of these geometries were then improved by applying the dynamically scaled external correlation (DSEC) method to all MRCI points, and the resulting DSEC energies were used for construction of the ground-state PES for each symmetry. The many-body component of the DSEC energies for the three-dimensional (3)A' and (3)A″ PESs was then least-squares fitted in terms of permutationally invariant polynomials in mixed exponential-Gaussian bond order variables. The global and local minima as well as the transition structures of both the (3)A' and the (3)A″ analytic PES were explored. In agreement with previous work, we find that the reverse reaction is barrierless on the (3)A″ surface along the minimum energy pathway. However, we have explored several new local minima and transition structures on the (3)A' PES. Furthermore, based on the newly found minima and transition structures, two independent reaction mechanisms have been illustrated for the reaction path on the (3)A' PES. The analytic surfaces may be used for dynamics calculations of electronically adiabatic reactive scattering and energy transfer.
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Affiliation(s)
- Wei Lin
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, USA
| | - Zoltan Varga
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, USA
| | - Guoliang Song
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, USA
| | - Yuliya Paukku
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, USA
| | - Donald G Truhlar
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, USA
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8
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Holmes-Ross HL, Valenti RJ, Yu HG, Hall GE, Lawrance WD. Rotational and angular distributions of NO products from NO-Rg (Rg = He, Ne, Ar) complex photodissociation. J Chem Phys 2016; 144:044309. [PMID: 26827219 DOI: 10.1063/1.4940690] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present the results of an investigation into the rotational and angular distributions of the NO à state fragment following photodissociation of the NO-He, NO-Ne, and NO-Ar van der Waals complexes excited via the à ← X̃ transition. For each complex, the dissociation is probed for several values of Ea, the available energy above the dissociation threshold. For NO-He, the Ea values probed were 59, 172, and 273 cm(-1); for NO-Ne they were 50 and 166 cm(-1); and for NO-Ar they were 44, 94, 194, and 423 cm(-1). The NO à state rotational distributions arising from NO-He are cold, with most products in low angular momentum states. NO-Ne leads to broader NO rotational distributions but they do not extend to the maximum possible given the energy available. In the case of NO-Ar, the distributions extend to the maximum allowed at that energy and show the unusual shapes associated with the rotational rainbow effect reported in previous studies. This is the only complex for which a rotational rainbow effect is observed at the chosen Ea values. Product angular distributions have also been measured for the NO à photodissociation product for the three complexes. NO-He produces nearly isotropic fragments, but the anisotropy parameter, β, for NO-Ne and NO-Ar photofragments shows a surprising change in sign from negative to positive as Ea increases within the unstructured excitation profile. Franck-Condon selection of a broader distribution of geometries including more linear geometries at lower excitation energies and more T-shaped geometries at higher energies can account for the changing recoil anisotropy. Two-dimensional wavepacket calculations are reported to model the rotational state distributions and the bound-continuum absorption spectra.
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Affiliation(s)
- Heather L Holmes-Ross
- School of Chemical and Physical Sciences, Flinders University, GPO Box 2100, Adelaide, South Australia 5001, Australia
| | - Rebecca J Valenti
- School of Chemical and Physical Sciences, Flinders University, GPO Box 2100, Adelaide, South Australia 5001, Australia
| | - Hua-Gen Yu
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
| | - Gregory E Hall
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
| | - Warren D Lawrance
- School of Chemical and Physical Sciences, Flinders University, GPO Box 2100, Adelaide, South Australia 5001, Australia
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9
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Varga Z, Meana-Pañeda R, Song G, Paukku Y, Truhlar DG. Potential energy surface of triplet N2O2. J Chem Phys 2016; 144:024310. [DOI: 10.1063/1.4939008] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Zoltan Varga
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, USA
| | - Rubén Meana-Pañeda
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, USA
| | - Guoliang Song
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, USA
| | - Yuliya Paukku
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, USA
| | - Donald G. Truhlar
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, USA
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10
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Harding DJ, Neugebohren J, Grütter M, Schmidt-May AF, Auerbach DJ, Kitsopoulos TN, Wodtke AM. Single-field slice-imaging with a movable repeller: photodissociation of N₂O from a hot nozzle. J Chem Phys 2014; 141:054201. [PMID: 25106578 DOI: 10.1063/1.4891469] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
We present a new photo-fragment imaging spectrometer, which employs a movable repeller in a single field imaging geometry. This innovation offers two principal advantages. First, the optimal fields for velocity mapping can easily be achieved even using a large molecular beam diameter (5 mm); the velocity resolution (better than 1%) is sufficient to easily resolve photo-electron recoil in (2 + 1) resonant enhanced multiphoton ionization of N2 photoproducts from N2O or from molecular beam cooled N2. Second, rapid changes between spatial imaging, velocity mapping, and slice imaging are straightforward. We demonstrate this technique's utility in a re-investigation of the photodissociation of N2O. Using a hot nozzle, we observe slice images that strongly depend on nozzle temperature. Our data indicate that in our hot nozzle expansion, only pure bending vibrations--(0, v2, 0)--are populated, as vibrational excitation in pure stretching or bend-stretch combination modes are quenched via collisional near-resonant V-V energy transfer to the nearly degenerate bending states. We derive vibrationally state resolved absolute absorption cross-sections for (0, v2 ≤ 7, 0). These results agree well with previous work at lower values of v2, both experimental and theoretical. The dissociation energy of N2O with respect to the O((1)D) + N2¹Σ(g)⁺ asymptote was determined to be 3.65 ± 0.02 eV.
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Affiliation(s)
- Dan J Harding
- Institute for Physical Chemistry, Georg-August University of Göttingen, 37077 Göttingen, Germany and Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - J Neugebohren
- Institute for Physical Chemistry, Georg-August University of Göttingen, 37077 Göttingen, Germany and Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - M Grütter
- Institute for Physical Chemistry, Georg-August University of Göttingen, 37077 Göttingen, Germany and Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - A F Schmidt-May
- Institute for Physical Chemistry, Georg-August University of Göttingen, 37077 Göttingen, Germany and Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - D J Auerbach
- Institute for Physical Chemistry, Georg-August University of Göttingen, 37077 Göttingen, Germany and Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - T N Kitsopoulos
- Institute for Physical Chemistry, Georg-August University of Göttingen, 37077 Göttingen, Germany and Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - A M Wodtke
- Institute for Physical Chemistry, Georg-August University of Göttingen, 37077 Göttingen, Germany and Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
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11
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Li J, Caridade PJSB, Varandas AJC. Quasiclassical Trajectory Study of the Atmospheric Reaction N(2D) + NO(X 2Π) → O(1D) + N2(X 1Σg+). J Phys Chem A 2014; 118:1277-86. [PMID: 24479716 DOI: 10.1021/jp408487y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jing Li
- Departamento
de Química, Universidade de Coimbra, 3004-535 Coimbra,Portugal
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12
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Mutunga FM, Follett SE, Anderson DT. Communication: H-atom reactivity as a function of temperature in solid parahydrogen: The H + N2O reaction. J Chem Phys 2013; 139:151104. [DOI: 10.1063/1.4826317] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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13
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Carbon dioxide photolysis from 150 to 210 nm: singlet and triplet channel dynamics, UV-spectrum, and isotope effects. Proc Natl Acad Sci U S A 2013; 110:17691-6. [PMID: 23776249 DOI: 10.1073/pnas.1213083110] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We present a first principles study of the carbon dioxide (CO2) photodissociation process in the 150- to 210-nm wavelength range, with emphasis on photolysis below the carbon monoxide + singlet channel threshold at ~167 nm. The calculations reproduce experimental absorption cross-sections at a resolution of ~0.5 nm without scaling the intensity. The observed structure in the 150- to 210-nm range is caused by excitation of bending motion supported by the deep wells at bent geometries in the and potential energy surfaces. Predissociation below the singlet channel threshold occurs via spin-orbit coupling to nearby repulsive triplet states. Carbon monoxide vibrational and rotational state distributions in the singlet channel as well as the triplet channel for excitation at 157 nm satisfactorily reproduce experimental data. The cross-sections of individual CO2 isotopologues ((12)C(16)O2, (12)C(17)O(16)O, (12)C(18)O(16)O, (13)C(16)O2, and (13)C(18)O(16)O) are calculated, demonstrating that strong isotopic fractionation will occur as a function of wavelength. The calculations provide accurate, detailed insight into CO2 photoabsorption and dissociation dynamics, and greatly extend knowledge of the temperature dependence of the cross-section to cover the range from 0 to 400 K that is useful for calculations of propagation of stellar light in planetary atmospheres. The model is also relevant for the interpretation of laboratory experiments on mass-independent isotopic fractionation. Finally, the model shows that the mass-independent fractionation observed in a series of Hg lamp experiments is not a result of hyperfine interactions making predissociation of (17)O containing CO2 more efficient.
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McBane GC, Schmidt JA, Johnson MS, Schinke R. Ultraviolet photodissociation of OCS: Product energy and angular distributions. J Chem Phys 2013; 138:094314. [DOI: 10.1063/1.4793275] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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15
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Schmidt JA, Johnson MS, McBane GC, Schinke R. The ultraviolet spectrum of OCS from first principles: Electronic transitions, vibrational structure and temperature dependence. J Chem Phys 2012; 137:054313. [DOI: 10.1063/1.4739756] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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Schinke R, Schmidt JA. Photodissociation of N2O: Excitation of 1A″ States. J Phys Chem A 2012; 116:11083-7. [DOI: 10.1021/jp302362m] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Reinhard Schinke
- Max-Planck-Institut für Dynamik und Selbstorganisation (MPIDS), D-37077
Göttingen, Deutschland
| | - Johan A. Schmidt
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100
Copenhagen Ø, Denmark
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Schmidt JA, Johnson MS, McBane GC, Schinke R. Communication: Multi-state analysis of the OCS ultraviolet absorption including vibrational structure. J Chem Phys 2012; 136:131101. [PMID: 22482532 DOI: 10.1063/1.3701699] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- J A Schmidt
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark.
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18
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McBane GC, Schinke R. Product angular distributions in the ultraviolet photodissociation of N2O. J Chem Phys 2012; 136:044314. [DOI: 10.1063/1.3679171] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Schinke R, Schmidt JA, Johnson MS. Photodissociation of N2O: Triplet states and triplet channel. J Chem Phys 2011; 135:194303. [DOI: 10.1063/1.3660349] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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