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Tanichev AS, Petrov DV. Pressure broadening in Raman spectra of CH 4-N 2, CH 4-CO 2, and CH 4-C 2H 6 gas mixtures. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 291:122396. [PMID: 36696859 DOI: 10.1016/j.saa.2023.122396] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 01/13/2023] [Accepted: 01/17/2023] [Indexed: 06/17/2023]
Abstract
Different molecular environments change the spectrum of a given gas sample involved in a mixture compared to the spectrum of a pure gas. It is necessary to account for this effect to improve the accuracy of the analysis of the natural gas composition by Raman spectroscopy. First, the change in the main components of natural gas (methane, nitrogen, carbon dioxide, and ethane) must be considered. This work is devoted to the mutual influence of CH4-N2, CH4-CO2, and CH4-C2H6 on their characteristic Raman bands in the range of 300-2500 cm-1. The half-width and asymmetry of the Q branches of N2, CO2, and C2H6 as a function of methane concentration were obtained in the range of 1-50 bar. The averaged broadening coefficients of the rotational-vibrational lines of the ν2 band of CH4 perturbed by N2, CO2, and C2H6 are measured. A high-sensitivity spectrometer with a resolution of 0.5 cm-1 based on spontaneous Raman scattering was used to obtain reliable results. The algorithm and all the necessary parameters for simulating the effect of various molecular environments on the Raman bands of the main components of natural gas are presented.
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Affiliation(s)
- Aleksandr S Tanichev
- Laboratory of Ecological Instrumentation, Institute of Monitoring of Climatic and Ecological Systems, 634055 Tomsk, Russia.
| | - Dmitry V Petrov
- Laboratory of Ecological Instrumentation, Institute of Monitoring of Climatic and Ecological Systems, 634055 Tomsk, Russia; Department of Optics and Spectroscopy, Tomsk State University, 634050 Tomsk, Russia
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Krupa K, Baudin K, Parriaux A, Fanjoux G, Millot G. Intense stimulated Raman scattering in CO 2-filled hollow-core fibers. OPTICS LETTERS 2019; 44:5318-5321. [PMID: 31674997 DOI: 10.1364/ol.44.005318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 10/03/2019] [Indexed: 06/10/2023]
Abstract
We demonstrate experimentally, the generation of an intense broadband comb-like spectrum spontaneously built up through stimulated Raman scattering in a low-pressure CO2-filled hollow-core photonic crystal fiber pumped by a single infrared pump.
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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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Rudenko A, Makhija V, Vajdi A, Ergler T, Schürholz M, Kushawaha RK, Ullrich J, Moshammer R, Kumarappan V. Strong-field-induced wave packet dynamics in carbon dioxide molecule. Faraday Discuss 2016; 194:463-478. [PMID: 27711853 DOI: 10.1039/c6fd00152a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Temporal evolution of electronic and nuclear wave packets created in strong-field excitation of the carbon dioxide molecule is studied employing momentum-resolved ion spectroscopy and channel-selective Fourier analysis. Combining the data obtained with two different pump-probe set-ups, we observed signatures of vibrational dynamics in both, ionic and neutral states of the molecule. We consider far-off-resonance two-photon Raman scattering to be the most likely mechanism of vibrational excitation in the electronic ground state of the neutral CO2. Using the measured phase relation between the time-dependent yields of different fragmentation channels, which is consistent with the proposed mechanism, we suggest an intuitive picture of the underlying vibrational dynamics. For ionic states, we found signatures of both, electronic and vibrational excitations, which involve the ground and the first excited electronic states, depending on the particular final state of the fragmentation. While our results for ionic states are consistent with the recent observations by Erattupuzha et al. [J. Chem. Phys.144, 024306 (2016)], the neutral state contribution was not observed there, which we attribute to a larger bandwidth of the 8 fs pulses we used for this experiment. In a complementary measurement employing longer, 35 fs pulses in a 30 ps delay range, we study the influence of rotational excitation on our observables, and demonstrate how the coherent electronic wave packet created in the ground electronic state of the ion completely decays within 10 ps due to the coupling to rotational motion.
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Affiliation(s)
- Artem Rudenko
- J.R Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA. and Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - Varun Makhija
- J.R Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA. and Department of Physics, University of Ottawa, Ottawa, ON K1N 6N5, Canada
| | - Aram Vajdi
- J.R Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA. and Department of Electrical and Computer Engineering, Kansas State University, Manhattan, Kansas 66506, USA
| | - Thorsten Ergler
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | | | - Rajesh K Kushawaha
- J.R Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA.
| | - Joachim Ullrich
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany and Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany
| | | | - Vinod Kumarappan
- J.R Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA.
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Louvel M, Bordage A, Da Silva-Cadoux C, Testemale D, Lahera E, Del Net W, Geaymond O, Dubessy J, Argoud R, Hazemann JL. A high-pressure high-temperature setup for in situ Raman spectroscopy of supercritical fluids. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2014.09.032] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Johnson JA, Kim K, Mayhew M, Mitchell DG, Sevy ET. Rotationally resolved IR-diode laser studies of ground-state CO2 excited by collisions with vibrationally excited pyridine. J Phys Chem A 2008; 112:2543-52. [PMID: 18321080 DOI: 10.1021/jp076543d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Relaxation of highly vibrationally excited pyridine (C5NH5) by collisions with carbon dioxide has been investigated using diode laser transient absorption spectroscopy. Vibrationally hot pyridine (E' = 40,660 cm(-1)) was prepared by 248 nm excimer laser excitation followed by rapid radiationless relaxation to the ground electronic state. Pyridine then collides with CO2, populating the high rotational CO2 states with large amounts of translational energy. The CO2 nascent rotational population distribution of the high-J (J = 58-80) tail of the 00(0)0 state was probed at short times following the excimer laser pulse to measure rate constants and probabilities for collisions populating these CO2 rotational states. Doppler spectroscopy was used to measure the CO2 recoil velocity distribution for J = 58-80 of the 00(0)0 state. The energy-transfer distribution function, P(E,E'), from E' - E approximately 1300-7000 cm(-1) was obtained by re-sorting the state-indexed energy-transfer probabilities as a function of DeltaE. P(E,E') is fit to an exponential or biexponential function to determine the average energy transferred in a single collision between pyridine and CO2. Also obtained are fit parameters that can be compared to previously studied systems (pyrazine, C6F6, methylpyrazine, and pyrimidine/CO2). Although the rotational and translational temperatures that describe pyridine/CO2 energy transfer are similar to previous systems, the energy-transfer probabilities are much smaller. P(E,E') fit parameters for pyridine/CO2 and the four previously studied systems are compared to various donor molecular properties. Finally, P(E,E') is analyzed in the context of two models, one indicating that P(E,E') shape is primarily determined by the low-frequency out-of-plane donor vibrational modes, and the other that indicates that P(E,E') shape can be determined from how the donor molecule final density of states changes with DeltaE.
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Affiliation(s)
- Jeremy A Johnson
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, USA
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Johnson JA, Duffin AM, Hom BJ, Jackson KE, Sevy ET. Quenching of highly vibrationally excited pyrimidine by collisions with CO2. J Chem Phys 2008; 128:054304. [DOI: 10.1063/1.2825599] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Mitchell DG, Johnson AM, Johnson JA, Judd KA, Kim K, Mayhew M, Powell AL, Sevy ET. Collisional Relaxation of the Three Vibrationally Excited Difluorobenzene Isomers by Collisions with CO2: Effect of Donor Vibrational Mode. J Phys Chem A 2008; 112:1157-67. [DOI: 10.1021/jp0771365] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Deborah G. Mitchell
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602
| | - Alan M. Johnson
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602
| | - Jeremy A. Johnson
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602
| | - Kortney A. Judd
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602
| | - Kilyoung Kim
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602
| | - Maurine Mayhew
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602
| | - Amber L. Powell
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602
| | - Eric T. Sevy
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602
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Korona T, Moszynski R, Thibault F, Launay JM, Bussery-Honvault B, Boissoles J, Wormer PES. Spectroscopic, collisional, and thermodynamic properties of the He–CO2 complex from an ab initio potential: Theoretical predictions and confrontation with the experimental data. J Chem Phys 2001. [DOI: 10.1063/1.1385524] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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10
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Sevy ET, Rubin SM, Lin Z, Flynn GW. Translational and rotational excitation of the CO[sub 2](00[sup 0]0) vibrationless state in the collisional quenching of highly vibrationally excited 2-methylpyrazine: Kinetics and dynamics of large energy transfers. J Chem Phys 2000. [DOI: 10.1063/1.1289247] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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11
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Boulet C, Bouanich JP, Hartmann JM, Lavorel B, Deroussiaux A. Line mixing in the ν1 and 2ν2 isotropic Raman Q-branch of CO2 perturbed by argon and helium. J Chem Phys 1999. [DOI: 10.1063/1.480031] [Citation(s) in RCA: 9] [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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Deroussiaux A, Lavorel B. Vibrational and rotational collisional relaxation in CO2–Ar and CO2–He mixtures studied by stimulated Raman-infrared double resonance. J Chem Phys 1999. [DOI: 10.1063/1.479456] [Citation(s) in RCA: 11] [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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Michaels CA, Mullin AS, Park J, Chou JZ, Flynn GW. The collisional deactivation of highly vibrationally excited pyrazine by a bath of carbon dioxide: Excitation of the infrared inactive (1000), (0200), and (0220) bath vibrational modes. J Chem Phys 1998. [DOI: 10.1063/1.475666] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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14
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Michaels CA, Lin Z, Mullin AS, Tapalian HC, Flynn GW. Translational and rotational excitation of the CO2(0000) vibrationless state in the collisional quenching of highly vibrationally excited perfluorobenzene: Evidence for impulsive collisions accompanied by large energy transfers. J Chem Phys 1997. [DOI: 10.1063/1.473675] [Citation(s) in RCA: 61] [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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Seve E, Millot G, Remoissenet M, Bilbault JM, Haelterman M. Modulational instability and critical regime in a highly birefringent fiber. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1996; 54:3519-3534. [PMID: 9913880 DOI: 10.1103/physreva.54.3519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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16
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Brownsword RA, Salh JS, Smith IWM. Collision broadening of CO2transitions in the region of 4.3 µm. Effects of broadening gas (He, Ar and N2), rovibrational states and temperature. ACTA ACUST UNITED AC 1995. [DOI: 10.1039/ft9959100191] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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