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Conway EK, Kyuberis AA, Polyansky OL, Tennyson J, Zobov NF. A highly accurate ab initio dipole moment surface for the ground electronic state of water vapour for spectra extending into the ultraviolet. J Chem Phys 2018; 149:084307. [DOI: 10.1063/1.5043545] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Affiliation(s)
- Eamon K. Conway
- Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom
- Atomic and Molecular Physics Division, Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA
| | - Aleksandra A. Kyuberis
- Institute of Applied Physics, Russian Academy of Sciences, Uljanov Street 46, Nizhniy Novgorod 603950, Russia
| | - Oleg L. Polyansky
- Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom
- Institute of Applied Physics, Russian Academy of Sciences, Uljanov Street 46, Nizhniy Novgorod 603950, Russia
| | - Jonathan Tennyson
- Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom
| | - Nikolai F. Zobov
- Institute of Applied Physics, Russian Academy of Sciences, Uljanov Street 46, Nizhniy Novgorod 603950, Russia
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Polyansky OL, Ovsyannikov RI, Kyuberis AA, Lodi L, Tennyson J, Zobov NF. Calculation of Rotation–Vibration Energy Levels of the Water Molecule with Near-Experimental Accuracy Based on an ab Initio Potential Energy Surface. J Phys Chem A 2013; 117:9633-43. [DOI: 10.1021/jp312343z] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Oleg L. Polyansky
- Department of Physics and Astronomy, University College London, Gower Street, London WC1E
6BT, United Kingdom
- Institute
of Applied Physics, Russian Academy of Science, Ulyanov Street 46, Nizhny
Novgorod 603950, Russia
| | - Roman I. Ovsyannikov
- Institute
of Applied Physics, Russian Academy of Science, Ulyanov Street 46, Nizhny
Novgorod 603950, Russia
| | - Aleksandra A. Kyuberis
- Institute
of Applied Physics, Russian Academy of Science, Ulyanov Street 46, Nizhny
Novgorod 603950, Russia
| | - Lorenzo Lodi
- Department of Physics and Astronomy, University College London, Gower Street, London WC1E
6BT, United Kingdom
| | - Jonathan Tennyson
- Department of Physics and Astronomy, University College London, Gower Street, London WC1E
6BT, United Kingdom
| | - Nikolai F. Zobov
- Institute
of Applied Physics, Russian Academy of Science, Ulyanov Street 46, Nizhny
Novgorod 603950, Russia
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Carter S, Sharma AR, Bowman JM. Multimode calculations of rovibrational energies and dipole transition intensities for polyatomic molecules with torsional motion: Application to H2O2. J Chem Phys 2011; 135:014308. [DOI: 10.1063/1.3604935] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Carter S, Sharma AR, Bowman JM, Rosmus P, Tarroni R. Calculations of rovibrational energies and dipole transition intensities for polyatomic molecules using MULTIMODE. J Chem Phys 2010; 131:224106. [PMID: 20001023 DOI: 10.1063/1.3266577] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
We report rigorous calculations of rovibrational energies and dipole transition intensities for three molecules using a new version of the code MULTIMODE. The key features of this code which permit, for the first time, such calculations for moderately sized but otherwise general polyatomic molecules are briefly described. Calculations for the triatomic molecule BF(2) are done to validate the code. New calculations for H(2)CO and H(2)CS are reported; these make use of semiempirical potentials but ab initio dipole moment surfaces. The new dipole surface for H(2)CO is a full-dimensional fit to the dipole moment obtained with the coupled-cluster with single and double excitations and a perturbative treatment of triple excitations method with the augmented correlation consistent triple zeta basis set. Detailed comparisons are made with experimental results from a fit to relative data for H(2)CS and absolute intensities from the HITRAN database for H(2)CO.
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Affiliation(s)
- Stuart Carter
- Department of Chemistry, University of Reading, RG6 2AD, England
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Lanquetin R, Coudert LH, Camy-Peyret C. High-Lying Rotational Levels of Water: An Analysis of the Energy Levels of the Five First Vibrational States. JOURNAL OF MOLECULAR SPECTROSCOPY 2001; 206:83-103. [PMID: 11281688 DOI: 10.1006/jmsp.2001.8300] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
As a continuation of the work carried out on the ground and (010) vibrational states of water (R. Lanquetin, L. H. Coudert, and C. Camy-Peyret, 1999, J. Mol. Spectrosc. 195, 54-57), rotational energy levels for these two states are revisited here and new accurate rotational energy levels are considered for the three next vibrational states, that is, the (020), (100), and (001) states. Experimental rotational energies, along with their uncertainties, are retrieved through analyses of already published data sets and of discharge and flame emission spectra. The maximum value of J for the obtained levels is 25 for the ground state, 21 for the (010) state, and 20 for the three next states. Based on the bending-rotation Hamiltonian approach (L. H. Coudert, 1997, J. Mol. Spectrosc. 181, 246-273), a new theoretical approach is proposed to calculate rotational energies in the five interacting vibrational states under consideration and is used to carry out an analysis of the experimental energies. Comparisons with other existing energy level data sets are also presented. Copyright 2001 Academic Press.
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Affiliation(s)
- R. Lanquetin
- Laboratoire d'Énergétique et d'Économie d'Énergie, 1, Chemin Desvallières, Ville d'Avray, 92410, France
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Lanquetin R, Coudert LH, Camy-Peyret C. High-Lying Rotational Levels of Water: Comparison of Calculated and Experimental Energy Levels for (000) and (010) up to J = 25 and 21. JOURNAL OF MOLECULAR SPECTROSCOPY 1999; 195:54-67. [PMID: 10191152 DOI: 10.1006/jmsp.1999.7822] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Emission spectra of methane-oxygen low-pressure flames have been recorded at a resolution of 0.02 cm-1 with an infrared Fourier transform spectrometer in the spectral ranges 780-1370 and 1800-5000 cm-1. The flame temperature was about 1850 K and a large number of transitions involving J values as high as 34 for an extended set of vibrational states could be assigned. Combined with already published data sets on H2O, our line position analysis yielded rotational energy levels for many of these states, but only the results relevant to the ground and the (010) states are presented here. The experimental energies for these two states have been fitted with the help of the bending-rotation Hamiltonian approach [L. H. Coudert, J. Mol. Spectrosc. 181, 246-273 (1997)], and for each rotational level, the calculated energy along with its uncertainty is reported and compared with the observed value. Comparisons with other available energy level data sets for the ground and (010) states are also presented. Copyright 1999 Academic Press.
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Affiliation(s)
- R Lanquetin
- Unité propre du CNRS (UPR 0136), Université Pierre et Marie Curie, Tour 13, Boîte 76, 4 Place Jussieu, Paris Cedex 05, 75252, France
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Zobov NF, Polyansky OL, Tennyson J, Lotoski JA, Colarusso P, Zhang K, Bernath PF. Hot Bands of Water up to 6nu2-5nu2 in the 933-2500 cm-1 Region. JOURNAL OF MOLECULAR SPECTROSCOPY 1999; 193:118-136. [PMID: 9878493 DOI: 10.1006/jmsp.1998.7732] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Emission spectra have been recorded for hot water at temperatures up to 1550 degreesC. Separate spectra have been recorded in the 800-1900 and 1800-2500 cm-1 range. Assignments are made using a linelist generated from high accuracy, variational nuclear motion calculations, and energy differences. The spectra contain many hot bending transitions of the form (0n0)-(0n-10), where states up to n = 6 have been assigned. Detailed analysis shows that the spectra contain lines from 34 separate vibrational bands including other hot bending transitions and the difference bands (030)-(100), (110)-(020), (011)-(020), (100)-(010), (040)-(110), (040)-(011), (120)-(030), (012)-(030), (011)-(100), (110)-(001), and (101)-(110), all of which have not been observed previously. From a total of 8959 lines recorded, 6810 have been assigned; 4556 of these lines are new. These spectra represent the first detection of the (060) vibrational band, for which a band origin of 8870.54 +/- 0.05 cm-1 is determined. The (050) band origin is confirmed as 7542.40 +/- 0.03 cm-1. The assignments extend the range of J and Ka values observed for the bending states, particularly for (050) and (060), where 63 and 27 different rotational levels, respectively, have now been observed; 53 frequencies given in HITRAN are corrected. Copyright 1999 Academic Press.
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Affiliation(s)
- NF Zobov
- Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT, United Kingdom
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Polyansky OL, Zobov NF, Viti S, Tennyson J. Water Vapor Line Assignments in the Near Infrared. JOURNAL OF MOLECULAR SPECTROSCOPY 1998; 189:291-300. [PMID: 9647726 DOI: 10.1006/jmsp.1998.7557] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The high-resolution spectrum of water vapor between 13 200 and 16 500 cm-1 recorded by J.-Y. Mandin, J-P. Chevillard, C. Camy-Peyret, J.-M. Flaud, and J. W. Brault (1986. J. Molec. Spectrosc., 116, 167) is analyzed using high-accuracy linelists obtained using ab initio calculations and spectroscopically determined potential. Assignments to H216O transitions are presented for 663 of the 795 unassigned lines presented in the original paper. In addition, 38 lines are reassigned. The majority of these assignments and reassignments are confirmed by combination differences. These assignments significantly extend the measured data for the 4nu and 4nu + delta polyads and provide the first information on the (240), (033), (160), (170), and (071) bands. It is likely that a significant fraction of the remaining unassigned lines belong to H218O. Copyright 1998 Academic Press.
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Affiliation(s)
- OL Polyansky
- Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT, United Kingdom
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