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Thesing LV, Yachmenev A, González-Férez R, Küpper J. The Effect of Nuclear-Quadrupole Coupling in the Laser-Induced Alignment of Molecules. J Phys Chem A 2020; 124:2225-2230. [PMID: 32077290 DOI: 10.1021/acs.jpca.9b11433] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We present a theoretical study of the time-dependent laser alignment of molecules taking into account the hyperfine coupling due to nuclear-quadrupole interactions. The coupling of nuclear spins to the overall angular momentum of molecules significantly influences their rotational dynamics. Here, we systematically analyze the impact of the nuclear-quadrupole coupling on the rotational dynamics of the linear and the asymmetric-top diiodobenzene molecule induced by external laser fields. We explore different regimes of pulse shapes and laser-pulse intensities and detail under which conditions the quadrupole coupling cannot be neglected in the description of the laser alignment of molecules.
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Affiliation(s)
- Linda V Thesing
- Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany.,Center for Ultrafast Imaging, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.,Department of Physics, Universität Hamburg, Luruper Chaussee 149, Hamburg 22761, Germany
| | - Andrey Yachmenev
- Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany.,Center for Ultrafast Imaging, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Rosario González-Férez
- Instituto Carlos I de Fı́sica Teórica y Computacional and Departamento de Fı́sica Atómica, Molecular y Nuclear, Universidad de Granada, 18071 Granada, Spain
| | - Jochen Küpper
- Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany.,Center for Ultrafast Imaging, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.,Department of Physics, Universität Hamburg, Luruper Chaussee 149, Hamburg 22761, Germany.,Department of Chemistry, Universität Hamburg, Luruper Chaussee 149, Hamburg 22761, Germany
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2
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Boulogiannis GK, Kannis CS, Katsoprinakis GE, Sofikitis D, Rakitzis TP. Spin-Polarized Hydrogen Depolarization Rates at High Hydrogen Halide Pressures: Hyperfine Depolarization via the HY-H Complex. J Phys Chem A 2019; 123:8130-8134. [PMID: 31483657 DOI: 10.1021/acs.jpca.9b06372] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We measure the magnetization quantum beats of spin-polarized hydrogen (SPH) and spin-polarized deuterium (SPD) with a pickup coil, from the UV photodissociation of HCl, HBr, and DI, in the 5-5000 mbar pressure range. The pressure-dependent depolarization rate is linear at low pressures and reaches a plateau at higher pressures. The high-pressure depolarization rate is observed to be proportional to the halogen nuclear electric quadrupole coupling constant. We also investigate how the presence of an inert gas, SF6 or N2, affects the depolarization rate. The results are explained using a model in which depolarization occurs predominantly through an HY-H intermediate species (Y = Cl, Br, I).
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Affiliation(s)
- Gregoris K Boulogiannis
- Department of Physics , University of Crete , Herakleio , Greece.,Institute of Electronic Structure and Laser , Foundation for Research and Technology-Hellas , 71110 Heraklion-Crete , Greece
| | - Chrysovalantis S Kannis
- Department of Physics , University of Crete , Herakleio , Greece.,Institut für Kernphysik (IKP-4) , Forschungszentrum Jülich , Wilhelm-Johnen-Strasse 1 , 52425 Jülich , Germany.,Institute of Electronic Structure and Laser , Foundation for Research and Technology-Hellas , 71110 Heraklion-Crete , Greece
| | - Georgios E Katsoprinakis
- Department of Physics , University of Crete , Herakleio , Greece.,Institute of Electronic Structure and Laser , Foundation for Research and Technology-Hellas , 71110 Heraklion-Crete , Greece
| | - Dimitris Sofikitis
- Department of Physics , University of Crete , Herakleio , Greece.,Institute of Electronic Structure and Laser , Foundation for Research and Technology-Hellas , 71110 Heraklion-Crete , Greece
| | - T Peter Rakitzis
- Department of Physics , University of Crete , Herakleio , Greece.,Institute of Electronic Structure and Laser , Foundation for Research and Technology-Hellas , 71110 Heraklion-Crete , Greece
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3
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Sun ZF, Bishwakarma CK, Song L, van der Avoird A, van Hemert MC, Suits AG, McBane GC, Parker DH. Imaging inelastic scattering of CO with argon: polarization dependent differential cross sections. Phys Chem Chem Phys 2019; 21:9200-9211. [DOI: 10.1039/c9cp00876d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Rotationally inelastic scattering of carbon monoxide (CO) with argon at a collision energy of 700 cm−1 has been investigated by measuring polarization dependent differential scattering cross sections (PDDCSs) for rotationally excited CO molecules using a crossed molecular beam apparatus coupled with velocity-map ion imaging.
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Affiliation(s)
- Zhong-Fa Sun
- Department of Molecular and Laser Physics
- Institute for Molecules and Materials
- Radboud University
- 6525 AJ Nijmegen
- The Netherlands
| | - Chandan K. Bishwakarma
- Department of Molecular and Laser Physics
- Institute for Molecules and Materials
- Radboud University
- 6525 AJ Nijmegen
- The Netherlands
| | - Lei Song
- Theoretical Chemistry
- Institute for Molecules and Materials
- Radboud University
- 6525 AJ Nijmegen
- The Netherlands
| | - Ad van der Avoird
- Theoretical Chemistry
- Institute for Molecules and Materials
- Radboud University
- 6525 AJ Nijmegen
- The Netherlands
| | - Marc C. van Hemert
- Leiden Institute of Chemistry
- Gorlaeus Laboratories
- Leiden University
- 2333 CC Leiden
- The Netherlands
| | - Arthur G. Suits
- Department of Chemistry
- University of Missouri
- Columbia MO 65211
- USA
| | - George C. McBane
- Department of Chemistry
- Grand Valley State University
- Allendale
- USA
| | - David H. Parker
- Department of Molecular and Laser Physics
- Institute for Molecules and Materials
- Radboud University
- 6525 AJ Nijmegen
- The Netherlands
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4
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Thomas EF, Søndergaard AA, Shepperson B, Henriksen NE, Stapelfeldt H. Hyperfine-Structure-Induced Depolarization of Impulsively Aligned I_{2} Molecules. PHYSICAL REVIEW LETTERS 2018; 120:163202. [PMID: 29756917 DOI: 10.1103/physrevlett.120.163202] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Indexed: 06/08/2023]
Abstract
A moderately intense 450 fs laser pulse is used to create rotational wave packets in gas phase I_{2} molecules. The ensuing time-dependent alignment, measured by Coulomb explosion imaging with a delayed probe pulse, exhibits the characteristic revival structures expected for rotational wave packets but also a complex nonperiodic substructure and decreasing mean alignment not observed before. A quantum mechanical model attributes the phenomena to coupling between the rotational angular momenta and the nuclear spins through the electric quadrupole interaction. The calculated alignment trace agrees very well with the experimental results.
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Affiliation(s)
- Esben F Thomas
- Department of Chemistry, Technical University of Denmark, Building 206, DK-2800 Kongens Lyngby, Denmark
| | - Anders A Søndergaard
- Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark
| | - Benjamin Shepperson
- Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark
| | - Niels E Henriksen
- Department of Chemistry, Technical University of Denmark, Building 206, DK-2800 Kongens Lyngby, Denmark
| | - Henrik Stapelfeldt
- Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark
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5
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Luxford TFM, Sharples TR, McKendrick KG, Costen ML. Experimental testing of ab initio potential energy surfaces: Stereodynamics of NO(A 2Σ +) + Ne inelastic scattering at multiple collision energies. J Chem Phys 2016; 145:174304. [PMID: 27825214 DOI: 10.1063/1.4966688] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present a crossed molecular beam velocity-map ion imaging study of state-to-state rotational energy transfer of NO(A2Σ+, v = 0, N = 0, j = 0.5) in collisions with Ne atoms. From these measurements, we report differential cross sections and angle-resolved rotational angular momentum alignment moments for product states N' = 3 and 5-10 for collisions at an average energy of 523 cm-1, and N' = 3 and 5-14 for collisions at an average energy of 1309 cm-1, respectively. The experimental results are compared to the results of close-coupled quantum scattering calculations on two literature ab initio potential energy surfaces (PESs) [Pajón-Suárez et al., Chem. Phys. Lett. 429, 389 (2006) and Cybulski and Fernández, J. Phys. Chem. A 116, 7319 (2012)]. The differential cross sections from both experiment and theory show clear rotational rainbow structures at both collision energies, and comparison of the angles observed for the rainbow peaks leads to the conclusion that Cybulski and Fernández PES better represents the NO(A2Σ+)-Ne interaction at the collision energies used here. Sharp, forward scattered (<10°), peaks are observed in the experimental differential cross sections for a wide range of N' at both collision energies, which are not reproduced by theory on either PES. We identify these as L-type rainbows, characteristic of attractive interactions, and consistent with a shallow well in the collinear Ne-N-O geometry, similar to that calculated for the NO(A2Σ+)-Ar surface [Kłos et al., J. Chem. Phys. 129, 244303 (2008)], but absent from both of the NO(A2Σ+)-Ne surfaces tested here. The angle-resolved alignment moments calculated by quantum scattering theory are generally in good agreement with the experimental results, but both experiment and quantum scattering theories are dramatically different to the predictions of a classical rigid-shell, kinematic-apse conservation model. Strong oscillations are resolved in the experimental alignment moments as a function of scattering angle, confirming and extending the preliminary report of this behavior [Steill et al., J. Phys. Chem. A 117, 8163 (2013)]. These oscillations are correlated with structure in the differential cross section, suggesting an interference effect is responsible for their appearance.
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Affiliation(s)
- Thomas F M Luxford
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| | - Thomas R Sharples
- 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
| | - Matthew L Costen
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
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6
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Luxford TFM, Sharples TR, Townsend D, McKendrick KG, Costen ML. Comparative stereodynamics in molecule-atom and molecule-molecule rotational energy transfer: NO(A(2)Σ(+)) + He and D2. J Chem Phys 2016; 145:084312. [PMID: 27586927 DOI: 10.1063/1.4961258] [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 a crossed molecular beam scattering study, using velocity-map ion-imaging detection, of state-to-state rotational energy transfer for NO(A(2)Σ(+)) in collisions with the kinematically identical colliders He and D2. We report differential cross sections and angle-resolved rotational angular momentum polarization moments for transfer of NO(A, v = 0, N = 0, j = 0.5) to NO(A, v = 0, N' = 3, 5-12) in collisions with He and D2 at respective average collision energies of 670 cm(-1) and 663 cm(-1). Quantum scattering calculations on a literature ab initio potential energy surface for NO(A)-He [J. Kłos et al., J. Chem. Phys. 129, 244303 (2008)] yield near-quantitative agreement with the experimental differential scattering cross sections and good agreement with the rotational polarization moments. This confirms that the Kłos et al. potential is accurate within the experimental collisional energy range. Comparison of the experimental results for NO(A) + D2 and He collisions provides information on the hitherto unknown NO(A)-D2 potential energy surface. The similarities in the measured scattering dynamics of NO(A) imply that the general form of the NO(A)-D2 potential must be similar to that calculated for NO(A)-He. A consistent trend for the rotational rainbow maximum in the differential cross sections for NO(A) + D2 to peak at more forward angles than those for NO(A) + He is consistent with the NO(A)-D2 potential being more anisotropic with respect to NO(A) orientation. No evidence is found in the experimental measurements for coincident rotational excitation of the D2, consistent with the potential having low anisotropy with respect to D2. The NO(A) + He polarization moments deviate systematically from the predictions of a hard-shell, kinematic-apse scattering model, with larger deviations as N' increases, which we attribute to the shallow gradient of the anisotropic repulsive NO(A)-He potential energy surface.
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Affiliation(s)
- Thomas F M Luxford
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| | - Thomas R Sharples
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| | - Dave Townsend
- 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
| | - Matthew L Costen
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
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7
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Sharples TR, Luxford TFM, Townsend D, McKendrick KG, Costen ML. Rotationally inelastic scattering of NO(A(2)Σ(+)) + Ar: Differential cross sections and rotational angular momentum polarization. J Chem Phys 2015; 143:204301. [PMID: 26627953 DOI: 10.1063/1.4935962] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present the implementation of a new crossed-molecular beam, velocity-map ion-imaging apparatus, optimized for collisions of electronically excited molecules. We have applied this apparatus to rotational energy transfer in NO(A(2)Σ(+), v = 0, N = 0, j = 0.5) + Ar collisions, at an average energy of 525 cm(-1). We report differential cross sections for scattering into NO(A(2)Σ(+), v = 0, N' = 3, 5, 6, 7, 8, and 9), together with quantum scattering calculations of the differential cross sections and angle dependent rotational alignment. The differential cross sections show dramatic forward scattered peaks, together with oscillatory behavior at larger scattering angles, while the rotational alignment moments are also found to oscillate as a function of scattering angle. In general, the quantum scattering calculations are found to agree well with experiment, reproducing the forward scattering and oscillatory behavior at larger scattering angles. Analysis of the quantum scattering calculations as a function of total rotational angular momentum indicates that the forward scattering peak originates from the attractive minimum in the potential energy surface at the N-end of the NO. Deviations in the quantum scattering predictions from the experimental results, for scattering at angles greater than 10°, are observed to be more significant for scattering to odd final N'. We suggest that this represents inaccuracies in the potential energy surface, and in particular in its representation of the difference between the N- and O-ends of the molecule, as given by the odd-order Legendre moments of the surface.
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Affiliation(s)
- Thomas R Sharples
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| | - Thomas F M Luxford
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| | - Dave Townsend
- 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
| | - Matthew L Costen
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
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8
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Sticking Probability and Reactivity of Hyperthermal O2 Molecules Impinging on CO Pre-covered Pd(100): Effect of Rotational States with K > 1. Top Catal 2015. [DOI: 10.1007/s11244-015-0408-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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9
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Pan H, Yang J, Wang F, Liu K. Imaging the Stereodynamics of Cl + CH4(ν3 = 1): Polarization Dependence on the Rotational Branch and the Hyperfine Depolarization. J Phys Chem Lett 2014; 5:3878-3883. [PMID: 26278763 DOI: 10.1021/jz502088c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The transition state in the Cl + CH4 reaction is of Cl-H-C collinear geometry, which serves as the bottleneck to reaction. When the reactant CH4 is antisymmetrically stretch-excited to ν3 = 1 by absorbing a linearly polarized photon, all four C-H bonds are collectively excited, and any one of the H atoms could be attacked by the Cl atom. At first sight, it is not obvious how an excited spherical-top molecule like CH4 is aligned and what consequences will be on chemical reactivity by polarizing the CH4 reagents. As shown here, an enormous steric effect on reactivity is observed, which depends sensitively on the selected rotational states. By exploiting various rotational branches in optical excitation, we quantify the degree of stereospecificity for a few lowest rovibrational states of the aligned CH4(ν3 = 1) reagents, as well as account for the hyperfine depolarization factor. This information lays the foundation for a full stereorequirement study of the Cl + CH4(ν3 = 1) reaction.
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Affiliation(s)
- Huilin Pan
- †Institute of Atomic and Molecular Sciences (IAMS), Academia Sinica, P.O. Box 23-166, Taipei, Taiwan 10617
| | - Jiayue Yang
- †Institute of Atomic and Molecular Sciences (IAMS), Academia Sinica, P.O. Box 23-166, Taipei, Taiwan 10617
| | - Fengyan Wang
- †Institute of Atomic and Molecular Sciences (IAMS), Academia Sinica, P.O. Box 23-166, Taipei, Taiwan 10617
| | - Kopin Liu
- †Institute of Atomic and Molecular Sciences (IAMS), Academia Sinica, P.O. Box 23-166, Taipei, Taiwan 10617
- ‡Department of Physics, National Taiwan University, Taipei, Taiwan 10617
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10
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Orr-Ewing A, Simpson W, Rakitzis T, Zare R. Preparing Reagents: Time Dependence of HCl(v=1,J) Alignment Following Pulsed Infrared Excitation. Isr J Chem 2013. [DOI: 10.1002/ijch.199400014] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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11
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Wang F, Lin JS, Liu K. Steric Control of the Reaction of CH Stretch–Excited CHD
3
with Chlorine Atom. Science 2011; 331:900-3. [DOI: 10.1126/science.1199771] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Fengyan Wang
- Institute of Atomic and Molecular Sciences (IAMS), Academia Sinica, Taipei, Taiwan 10617
| | - Jui-San Lin
- Institute of Atomic and Molecular Sciences (IAMS), Academia Sinica, Taipei, Taiwan 10617
| | - Kopin Liu
- Institute of Atomic and Molecular Sciences (IAMS), Academia Sinica, Taipei, Taiwan 10617
- Department of Physics, National Taiwan University, Taipei, Taiwan 10617 and Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan 300
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12
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Bartlett NCM, Jankunas J, Zare RN, Harrison JA. Time-dependent depolarization of aligned D2 caused by hyperfine coupling. Phys Chem Chem Phys 2010; 12:15689-94. [DOI: 10.1039/c0cp00518e] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Mukherjee N. Molecular alignment using coherent resonant excitation: A new proposal for stereodynamic control of chemical reactions. J Chem Phys 2009; 131:164302. [DOI: 10.1063/1.3249970] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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14
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Rose RA, Orr-Ewing AJ, Yang CH, Vidma K, Groenenboom GC, Parker DH. Photodissociation dynamics of the A Σ2+ state of SH and SD radicals. J Chem Phys 2009; 130:034307. [DOI: 10.1063/1.3056570] [Citation(s) in RCA: 16] [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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15
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Bartlett NCM, Miller DJ, Zare RN, Alexander AJ, Sofikitis D, Rakitzis TP. Time-dependent depolarization of aligned HD molecules. Phys Chem Chem Phys 2009; 11:142-7. [DOI: 10.1039/b814133a] [Citation(s) in RCA: 15] [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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16
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Costen ML, Hall GE. Coherent and incoherent orientation and alignment of ICN photoproducts. Phys Chem Chem Phys 2007; 9:272-87. [PMID: 17186071 DOI: 10.1039/b612131d] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report extended measurements of the rotational polarization and correlated angular distribution of CN photofragments from ICN photodissociation, with a particular emphasis on the creation and detection of molecular orientation with circularly-polarized light. Doppler profiles of the nascent photoproducts are measured by Frequency-Modulated (FM) transient absorption, and the resulting high signal-to-noise data are valuable for verifying the form of the angular correlations between the recoil velocity, the photofragment rotational angular momentum, and the space-fixed frame defined by the dissociation polarization. A space-fixed bipolar moment notation can be used for an unambiguous characterization of the maximal set of polarization properties that can be created with one-photon excitation and detected with one-photon Doppler-resolved absorption spectroscopy. Relating the observed polarization moments to the various coherent and incoherent, adiabatic and non-adiabatic mechanisms, that have been derived and verified extensively in the case of diatomic photodissociation to polarized atomic fragments, is not unambiguous in the case of diatomic fragments from triatomic precursors. Constraints among various polarization moments confirmed in the case of diatomic dissociation are not confirmed in this triatomic case, where the perpendicular transitions to non-degenerate A' and A'' components of a linear Omega = 1 state are qualitatively different from excitation to degenerate Omega = +/-1 states in a diatomic molecule.
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Affiliation(s)
- Matthew L Costen
- School of Engineering and Physical Sciences, William H. Perkin Building, Heriot-Watt University, Edinburgh, UK.
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17
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Rakitzis TP. Highly spin-polarized atoms and molecules from rotationally state-selected molecules. PHYSICAL REVIEW LETTERS 2005; 94:083005. [PMID: 15783890 DOI: 10.1103/physrevlett.94.083005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2004] [Indexed: 05/24/2023]
Abstract
It is shown that large nuclear polarizations in isolated molecules may be created via the hyperfine interaction following excitation to selected rotational states |JM>. Explicit time-dependent nuclear polarization expressions for pulsed rotational excitation are presented for the case of one nuclear spin I, and for the case of two nuclear spins I1 and I2 in the hierarchical coupling limit. Photodissociation of the polarized molecules allows the production of polarized atoms, on short time scales if pulsed, at densities close to the parent molecule density.
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Affiliation(s)
- T Peter Rakitzis
- Department of Physics, University of Crete, P.O. 2203, 71003 Heraklion-Crete, Greece
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18
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CostenCurrent address: School of En ML, Hall GE. Hyperfine quantum beats from photolytic orientation and alignment. Phys Chem Chem Phys 2005; 7:1408-13. [DOI: 10.1039/b419006h] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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19
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Rutkowski M, Zacharias H. Depolarisation of the spatial alignment of the rotational angular momentum vector by hyperfine interaction. Chem Phys 2004. [DOI: 10.1016/j.chemphys.2004.01.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Anderson DT, Lester MI. Controlling the Relative Orientation of Reactants with Intermolecular Forces: Intermolecular State-Dependent Structure in Prereactive H2−OH Complexes. J Phys Chem A 2003. [DOI: 10.1021/jp021809w] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- David T. Anderson
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
| | - Marsha I. Lester
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
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21
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Fernández-Alonso F, Bean B, Ayers J, Pomerantz A, Zare R. New Scheme for Measuring the Angular Momentum Spatial Anisotropy of Vibrationally Excited H2 via the I 1Πg State. Z PHYS CHEM 2000. [DOI: 10.1524/zpch.2000.214.9.1167] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
We report the spectroscopic detection of vibrationally excited molecular hydrogen using 2+1 resonantly enhanced multiphoton ionization (REMPI) via the I
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22
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Aquilanti V, Ascenzi D, de Castro Vı́tores M, Pirani F, Cappelletti D. A quantum mechanical view of molecular alignment and cooling in seeded supersonic expansions. J Chem Phys 1999. [DOI: 10.1063/1.479537] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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23
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VAN KLEEF EDDYH, POWIS IVAN. Anisotropy in the preparation of symmetric top excited states. I. One-photon electric dipole excitation. Mol Phys 1999. [DOI: 10.1080/00268979909483013] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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24
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25
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Weida MJ, Parmenter CS. Practical Aspects of Aligning Asymmetric Top Molecules via Single-Photon Excitation: An Application to S1 ← S0 Excitation of Glyoxal. J Phys Chem A 1997. [DOI: 10.1021/jp972550y] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Miles J. Weida
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405
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Weida MJ, Parmenter CS. Aligning symmetric and asymmetric top molecules via single photon excitation. J Chem Phys 1997. [DOI: 10.1063/1.474955] [Citation(s) in RCA: 26] [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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Gericke KH, Kreher C, Rinnenthal JL. Stereocontrol of Reactive Encounters Using Polarized Light. J Phys Chem A 1997. [DOI: 10.1021/jp971015v] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Karl-Heinz Gericke
- Institut für Physikalische und Theoretische Chemie, Technische Universität Braunschweig, Hans-Sommer-Strasse 10, D-38106 Braunschweig, Germany
| | - Christoph Kreher
- Institut für Physikalische und Theoretische Chemie, Technische Universität Braunschweig, Hans-Sommer-Strasse 10, D-38106 Braunschweig, Germany
| | - Jan Leo Rinnenthal
- Institut für Physikalische und Theoretische Chemie, Technische Universität Braunschweig, Hans-Sommer-Strasse 10, D-38106 Braunschweig, Germany
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van Duijn EJ, Nokhai R, Hermans LJF, Pankov AY, Krylov SY. Rotational- and vibrational-state resolved HF-surface interactions investigated by surface light-induced drift. J Chem Phys 1997. [DOI: 10.1063/1.474755] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
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Chapman WB, Weida MJ, Nesbitt DJ. Scattering dynamics in HF+He, Ne, and Ar: State-to-state cross sections, Dopplerimetry, and alignment measurement via direct infrared laser absorption in crossed supersonic jets. J Chem Phys 1997. [DOI: 10.1063/1.473787] [Citation(s) in RCA: 32] [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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Zhang J, Riehn CW, Dulligan M, Wittig C. An experimental study of HF photodissociation: Spin–orbit branching ratio and infrared alignment. J Chem Phys 1996. [DOI: 10.1063/1.471419] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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Carter RT, Povey IM, Bitto H, Huber JR. Quantum beat study of the nuclear hyperfine structure of OD and Ar⋅OD in their A 2Σ+ electronic states. J Chem Phys 1996. [DOI: 10.1063/1.471776] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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Greeley JN, Martin JS, Morris JR, Jacobs DC. Scattering aligned NO+on Ag(111): The effect of internuclear‐axis direction on NO−and O−product formation. J Chem Phys 1995. [DOI: 10.1063/1.469550] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Loesch HJ, Stienkemeier F. Effect of reagent alignment on the product state distribution in the reaction Sr+HF(v=1, j=1)→SrF(v’, j’)+H. J Chem Phys 1994. [DOI: 10.1063/1.466942] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Effect of intermediate state depolarization on photoelectron angular distributions from molecules following (1+1′) REMPI. Chem Phys Lett 1993. [DOI: 10.1016/0009-2614(93)89257-i] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Loesch HJ, Stienkemeier F. Steric effects in the state specific reaction Li+HF (v=1, j=1, m=0)→LiF+H. J Chem Phys 1993. [DOI: 10.1063/1.464388] [Citation(s) in RCA: 89] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Black JF. Resolution of three optically active components of the transition dipole moment for 249 nm photodissociation of ICN. J Chem Phys 1993. [DOI: 10.1063/1.465061] [Citation(s) in RCA: 30] [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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Gandhi SR, Bernstein RB. Molecular orientation control for ‖JKMJ〉 —selected CH3I via influence of electric field on nuclear hyperfine coupling. J Chem Phys 1990. [DOI: 10.1063/1.458734] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Black JF, Waldeck JR, Zare RN. Evidence for three interacting potential energy surfaces in the photodissociation of ICN at 249 nm. J Chem Phys 1990. [DOI: 10.1063/1.457861] [Citation(s) in RCA: 77] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Zhang R, Rakestraw DJ, McKendrick KG, Zare RN. Comparison of the Ca+HF(DF) and Sr+HF(DF) reaction dynamics. J Chem Phys 1988. [DOI: 10.1063/1.455393] [Citation(s) in RCA: 44] [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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Rubahn H, Toennies JP. A molecular beam study of the potential anisotropy of laser vibrationally excited Li2(v=0,20) scattered from Kr. J Chem Phys 1988. [DOI: 10.1063/1.455523] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Gandhi SR, Curtiss TJ, Bernstein RB. Asymmetry of the polarized-laser-induced photofragmentation of oriented CH3I molecules. PHYSICAL REVIEW LETTERS 1987; 59:2951-2954. [PMID: 10035695 DOI: 10.1103/physrevlett.59.2951] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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O’Halloran MA, Joswig H, Zare RN. Alignment of CN from 248 nm photolysis of ICN: A new model of the à continuum dissociation dynamics. J Chem Phys 1987. [DOI: 10.1063/1.453627] [Citation(s) in RCA: 66] [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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