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Aerts A, Jolly SW, Kockaert P, Gorza SP, Auwera JV, Vaeck N. Modulated super-Gaussian laser pulse to populate a dark rovibrational state of acetylene. J Chem Phys 2023; 159:084303. [PMID: 37638622 DOI: 10.1063/5.0160526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 08/10/2023] [Indexed: 08/29/2023] Open
Abstract
A pulse-shaping technique in the mid-infrared spectral range based on pulses with a super-Gaussian temporal profile is considered for laser control. We show a realistic and efficient path to the population of a dark rovibrational state in acetylene (C2H2). The laser-induced dynamics in C2H2 are simulated using fully experimental structural parameters. Indeed, the rotation-vibration energy structure, including anharmonicities, is defined by the global spectroscopic Hamiltonian for the ground electronic state of C2H2 built from the extensive high-resolution spectroscopy studies on the molecule, transition dipole moments from intensities, and the effects of the (inelastic) collisions that are parameterized from line broadenings using the relaxation matrix [A. Aerts, J. Vander Auwera, and N. Vaeck, J. Chem. Phys. 154, 144308 (2021)]. The approach, based on an effective Hamiltonian, outperforms today's ab initio computations both in terms of accuracy and computational cost for this class of molecules. With such accuracy, the Hamiltonian permits studying the inner mechanism of theoretical pulse shaping [A. Aerts et al., J. Chem. Phys. 156, 084302 (2022)] for laser quantum control. Here, the generated control pulse presents a number of interferences that take advantage of the control mechanism to populate the dark state. An experimental setup is proposed for in-laboratory investigation.
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Affiliation(s)
- Antoine Aerts
- Université Libre de Bruxelles, Spectroscopy, Quantum Chemistry and Atmospheric Remote Sensing (SQUARES), 50 Avenue F. Roosevelt, C.P. 160/09, Brussels 1050, Belgium
| | - Spencer W Jolly
- Université Libre de Bruxelles, OPERA-Photonique, 50 Avenue F. Roosevelt, C.P. 194/05, Brussels 1050, Belgium
| | - Pascal Kockaert
- Université Libre de Bruxelles, OPERA-Photonique, 50 Avenue F. Roosevelt, C.P. 194/05, Brussels 1050, Belgium
| | - Simon-Pierre Gorza
- Université Libre de Bruxelles, OPERA-Photonique, 50 Avenue F. Roosevelt, C.P. 194/05, Brussels 1050, Belgium
| | - Jean Vander Auwera
- Université Libre de Bruxelles, Spectroscopy, Quantum Chemistry and Atmospheric Remote Sensing (SQUARES), 50 Avenue F. Roosevelt, C.P. 160/09, Brussels 1050, Belgium
| | - Nathalie Vaeck
- Université Libre de Bruxelles, Spectroscopy, Quantum Chemistry and Atmospheric Remote Sensing (SQUARES), 50 Avenue F. Roosevelt, C.P. 160/09, Brussels 1050, Belgium
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Aerts A, Kockaert P, Gorza SP, Brown A, Vander Auwera J, Vaeck N. Laser control of a dark vibrational state of acetylene in the gas phase—Fourier transform pulse shaping constraints and effects of decoherence. J Chem Phys 2022; 156:084302. [DOI: 10.1063/5.0080332] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
We propose a methodology to tackle the laser control of a non-stationary dark ro-vibrational state of acetylene (C2H2), given realistic experimental limitations in the 7.7 μm (1300 cm−1) region. Simulations are performed using the Lindblad master equation, where the so-called Lindblad parameters are used to describe the effect of the environment in the dilute gas phase. A phenomenological representation of the parameters is used, and they are extracted from high-resolution spectroscopy line broadening data. An effective Hamiltonian is used for the description of the system down to the rotational level close to experimental accuracy. The quality of both the Hamiltonian and Lindblad parameters is assessed by a comparison of a calculated infrared spectrum with the available experimental data. A single shaped laser pulse is used to perform the control, where elements of optics and pulse shaping using masks are introduced with emphasis on experimental limitations. The optimization procedure, based on gradients, explicitly takes into account the experimental constraints. Control performances are reported for shaping masks of increasing complexity. Although modest performances are obtained, mainly due to the strong pulse shaping constraints, we gain insights into the control mechanism. This work is the first step toward the conception of a realistic experiment that will allow for population characterization and manipulation of a non-stationary vibrational “dark” state. Effects of the collisions on the laser control in the dilute gas phase, leading to decoherence in the molecular system, are clearly shown.
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Affiliation(s)
- Antoine Aerts
- Spectroscopy, Quantum Chemistry and Atmospheric Remote Sensing (SQUARES), Université Libre de Bruxelles, 50 Avenue F. Roosevelt, C.P. 160/09, B-1050 Brussels, Belgium
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Pascal Kockaert
- OPERA-Photonique, Université Libre de Bruxelles, 50 Avenue F. Roosevelt, C.P. 194/05, B-1050 Brussels, Belgium
| | - Simon-Pierre Gorza
- OPERA-Photonique, Université Libre de Bruxelles, 50 Avenue F. Roosevelt, C.P. 194/05, B-1050 Brussels, Belgium
| | - Alex Brown
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Jean Vander Auwera
- Spectroscopy, Quantum Chemistry and Atmospheric Remote Sensing (SQUARES), Université Libre de Bruxelles, 50 Avenue F. Roosevelt, C.P. 160/09, B-1050 Brussels, Belgium
| | - Nathalie Vaeck
- Spectroscopy, Quantum Chemistry and Atmospheric Remote Sensing (SQUARES), Université Libre de Bruxelles, 50 Avenue F. Roosevelt, C.P. 160/09, B-1050 Brussels, Belgium
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Chang J, Guo L, Wang R, Mou J, Ren H, Ma J, Guo H. Absorption Spectra of Acetylene, Vinylidene, and Their Deuterated Isotopologues on Ab Initio Potential Energy and Dipole Moment Surfaces. J Phys Chem A 2019; 123:4232-4240. [DOI: 10.1021/acs.jpca.9b02662] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jing Chang
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, Sichuan 610065, China
| | - Lifen Guo
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, Sichuan 610065, China
| | - Ruifang Wang
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, Sichuan 610065, China
| | - Jie Mou
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, Sichuan 610065, China
| | - Haisheng Ren
- School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Jianyi Ma
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, Sichuan 610065, China
| | - Hua Guo
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
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4
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Orr BJ. Collision-induced rovibrational energy transfer in small polyatomic molecules: the role of intramolecular perturbations. Mol Phys 2018. [DOI: 10.1080/00268976.2018.1490463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Brian J. Orr
- Department of Physics and Astronomy, MQ Photonics Research Centre, Macquarie University, Sydney, Australia
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5
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Santos L, Herman M, Desouter-Lecomte M, Vaeck N. Rovibrational laser control targeting a dark state in acetylene. Simulation in the Ns = 1, Nr = 5 polyad. Mol Phys 2018. [DOI: 10.1080/00268976.2018.1469797] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- L. Santos
- Service de Chimie quantique et Photophysique, Université libre de Bruxelles, Brussels, Belgium
| | - M. Herman
- Service de Chimie quantique et Photophysique, Université libre de Bruxelles, Brussels, Belgium
| | - M. Desouter-Lecomte
- Laboratoire de Chimie Physique, Université Paris-sud, Orsay, France
- Département de Chimie, Université de Liége, Liége, Belgium
| | - N. Vaeck
- Service de Chimie quantique et Photophysique, Université libre de Bruxelles, Brussels, Belgium
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Davies JA, Whalley LE, Reid KL. Probing the origins of vibrational mode specificity in intramolecular dynamics through picosecond time-resolved photoelectron imaging studies. Phys Chem Chem Phys 2017; 19:5051-5062. [DOI: 10.1039/c6cp08132k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Enhanced torsion-vibration coupling associated with a selected vibrational mode is shown to accelerate intramolecular energy flow in p-fluorotoluene.
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DeVine JA, Weichman ML, Zhou X, Ma J, Jiang B, Guo H, Neumark DM. Non-Adiabatic Effects on Excited States of Vinylidene Observed with Slow Photoelectron Velocity-Map Imaging. J Am Chem Soc 2016; 138:16417-16425. [DOI: 10.1021/jacs.6b10233] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jessalyn A. DeVine
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
| | - Marissa L. Weichman
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
| | - Xueyao Zhou
- Department
of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jianyi Ma
- Institute
of Atomic and Molecular Physics, Sichuan University, Chengdu, Sichuan 610065, China
| | - Bin Jiang
- Department
of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Hua Guo
- Department
of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Daniel M. Neumark
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical
Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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Santos L, Iacobellis N, Herman M, Perry D, Desouter-Lecomte M, Vaeck N. A test of optimal laser impulsion for controlling population within theNs = 1,Nr = 5 polyad of12C2H2. Mol Phys 2015. [DOI: 10.1080/00268976.2015.1102980] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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9
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Quantum Dynamics of Vinylidene Photodetachment on an Accurate Global Acetylene-Vinylidene Potential Energy Surface. J Phys Chem A 2015; 119:8488-96. [DOI: 10.1021/acs.jpca.5b05061] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Fernando R, Qu C, Bowman JM, Field RW, Suits AG. Does Infrared Multiphoton Dissociation of Vinyl Chloride Yield Cold Vinylidene? J Phys Chem Lett 2015; 6:2457-2462. [PMID: 26266719 DOI: 10.1021/acs.jpclett.5b01031] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Velocity map imaging of the infrared multiphoton dissociation of vinyl chloride shows the formation of HCl in rotational levels below J = 10 that are associated with the three-center elimination pathway. The total translational energy release is observed to peak at 3-5 kcal/mol, which is consistent with the low reverse barrier predicted for the formation of HCl with vinylidene coproducts. Direct dynamics trajectory studies from the three-center transition state reproduce the observed distributions and show that the associated vinylidene is formed with only modest rotational excitation, precluding Coriolis-induced mixing among the excited vibrational levels of acetylene that would lead to distribution of vinylidene character into many vibrationally mixed acetylene vibrational levels. The results suggest that infrared multiphoton dissociation of vinyl chloride is an efficient route to synthesis of stable, cold vinylidene.
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Affiliation(s)
- Ravin Fernando
- †Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, United States
| | - Chen Qu
- ‡Department of Chemistry and Cherry L. Emerson Center for Scientific Computation, Emory University, Atlanta, Georgia 30322, United States
| | - Joel M Bowman
- ‡Department of Chemistry and Cherry L. Emerson Center for Scientific Computation, Emory University, Atlanta, Georgia 30322, United States
| | - Robert W Field
- §Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Arthur G Suits
- †Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, United States
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11
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Vázquez SA, Martínez-Núñez E. HCN elimination from vinyl cyanide: product energy partitioning, the role of hydrogen–deuterium exchange reactions and a new pathway. Phys Chem Chem Phys 2015; 17:6948-55. [DOI: 10.1039/c4cp05626d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A schematic diagram of HCN elimination channels from vinyl cyanide including a new CCdiss pathway.
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Affiliation(s)
- Saulo A. Vázquez
- Departamento de Química Física and Centro Singular de Investigación en Química Biológica y Materiales Moleculares
- Campus Vida
- Universidade de Santiago de Compostela
- Santiago de Compostela
- Spain
| | - Emilio Martínez-Núñez
- Departamento de Química Física and Centro Singular de Investigación en Química Biológica y Materiales Moleculares
- Campus Vida
- Universidade de Santiago de Compostela
- Santiago de Compostela
- Spain
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12
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Abstract
Full-dimensional variational calculations are reported for the isomerising disilyne molecule, Si2H2. Large-scale calculations using coordinates based on orthogonal satellite vectors permitted the computation of excited vibrational state energies and wavefunctions for all four isomeric forms: dibridged Si(H2)Si, monobridged Si(H)SiH, disilavinylidene H2SiSi, and trans-bent HSiSiH. Energies and wavefunctions have been determined for the lowest 2400 totally symmetric vibrational states; this set includes highly excited states above all three chemically relevant isomerisation barriers--up to about 8300 cm(-1) above the (dibridged) ground state. States strongly localised in the dibridged, monobridged, and disilavinylidene regions of the potential energy surface have been found as well as many partially or fully delocalised states. For the trans-bent form, only partially localised states have been identified. Comparisons are made with similar literature calculations on the isovalent acetylene-vinylidene system HCCH/H2CC.
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Affiliation(s)
- Mark M Law
- Chemistry Department, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, United Kingdom.
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13
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Herman M, Perry DS. Molecular spectroscopy and dynamics: a polyad-based perspective. Phys Chem Chem Phys 2013; 15:9970-93. [DOI: 10.1039/c3cp50463h] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Prozument K, Shaver RG, Ciuba MA, Muenter JS, Park GB, Stanton JF, Guo H, Wong BM, Perry DS, Field RW. A new approach toward transition state spectroscopy. Faraday Discuss 2013; 163:33-57; discussion 117-38. [DOI: 10.1039/c3fd20160k] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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