1
|
Maiti KS. Two-dimensional Infrared Spectroscopy Reveals Better Insights of Structure and Dynamics of Protein. Molecules 2021; 26:molecules26226893. [PMID: 34833985 PMCID: PMC8618531 DOI: 10.3390/molecules26226893] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 11/07/2021] [Accepted: 11/10/2021] [Indexed: 11/25/2022] Open
Abstract
Proteins play an important role in biological and biochemical processes taking place in the living system. To uncover these fundamental processes of the living system, it is an absolutely necessary task to understand the structure and dynamics of the protein. Vibrational spectroscopy is an established tool to explore protein structure and dynamics. In particular, two-dimensional infrared (2DIR) spectroscopy has already proven its versatility to explore the protein structure and its ultrafast dynamics, and it has essentially unprecedented time resolutions to observe the vibrational dynamics of the protein. Providing several examples from our theoretical and experimental efforts, it is established here that two-dimensional vibrational spectroscopy provides exceptionally more information than one-dimensional vibrational spectroscopy. The structural information of the protein is encoded in the position, shape, and strength of the peak in 2DIR spectra. The time evolution of the 2DIR spectra allows for the visualisation of molecular motions.
Collapse
Affiliation(s)
- Kiran Sankar Maiti
- Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany; ; Tel.: +49-89-289-54056
- Lehrstuhl für Experimental Physik, Ludwig-Maximilians-Universität München, Am Coulombwall 1, 85748 Garching, Germany
| |
Collapse
|
2
|
|
3
|
Tennyson J, McKemmish LK, Rivlin T. Low-temperature chemistry using the R-matrix method. Faraday Discuss 2018; 195:31-48. [PMID: 27711838 DOI: 10.1039/c6fd00110f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Techniques for producing cold and ultracold molecules are enabling the study of chemical reactions and scattering at the quantum scattering limit, with only a few partial waves contributing to the incident channel, leading to the observation and even full control of state-to-state collisions in this regime. A new R-matrix formalism is presented for tackling problems involving low- and ultra-low energy collisions. This general formalism is particularly appropriate for slow collisions occurring on potential energy surfaces with deep wells. The many resonance states make such systems hard to treat theoretically but offer the best prospects for novel physics: resonances are already being widely used to control diatomic systems and should provide the route to steering ultracold reactions. Our R-matrix-based formalism builds on the progress made in variational calculations of molecular spectra by using these methods to provide wavefunctions for the whole system at short internuclear distances, (a regime known as the inner region). These wavefunctions are used to construct collision energy-dependent R-matrices which can then be propagated to give cross sections at each collision energy. The method is formulated for ultracold collision systems with differing numbers of atoms.
Collapse
Affiliation(s)
- Jonathan Tennyson
- Department of Physics and Astronomy, University College London, London WC1E 6BT, UK.
| | - Laura K McKemmish
- Department of Physics and Astronomy, University College London, London WC1E 6BT, UK.
| | - Tom Rivlin
- Department of Physics and Astronomy, University College London, London WC1E 6BT, UK.
| |
Collapse
|
4
|
Roy S, Maiti KS. Structural sensitivity of CH vibrational band in methyl benzoate. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 196:289-294. [PMID: 29459159 DOI: 10.1016/j.saa.2018.02.031] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Accepted: 02/08/2018] [Indexed: 06/08/2023]
Abstract
The CH vibrational bands of methyl benzoate are studied to understand its coupling pattern with other vibrational bands of the biological molecule. This will facilitate to understand the biological structure and dynamics in spectroscopic as well as in microscopic study. Due to the congested spectroscopic pattern, near degeneracy, and strong anharmonicity of the CH stretch vibrations, assignment of the CH vibrational frequencies are often misleading. Anharmonic vibrational frequency calculation with multidimensional potential energy surface interprets the CH vibrational spectra more accurately. In this article we have presented the importance of multidimensional potential energy surface in anharmonic vibrational frequency calculation and discuss the unexpected red shift of asymmetric CH stretch vibration of methyl group. The CD stretch vibrational band which is splitted to double peaks due to the Fermi resonance is also discussed here.
Collapse
Affiliation(s)
- Susmita Roy
- Die Klinik und Poliklinik für Orthopädie und Sportorthopädie, Technische Universität München, Ismaninger Straße 22, München D81675, Germany
| | - Kiran Sankar Maiti
- Lehrstuhl für Experimental Physik, Ludwig-Maximilians-Universität München, Am Couombwall 1, Garching 85748, Germany; Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, Garching 85748, Germany.
| |
Collapse
|
5
|
Tennyson J. Perspective: Accurate ro-vibrational calculations on small molecules. J Chem Phys 2016; 145:120901. [DOI: 10.1063/1.4962907] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Jonathan Tennyson
- Department of Physics and Astronomy, University College London, Gower Street, WC1E 6BT London, United Kingdom
| |
Collapse
|
6
|
Abstract
Methyl benzoate is studied as a model compound for the development of new IR pulse schemes with possible applicability to biomolecules.
Collapse
|
7
|
Jaquet R. Investigation of the highest bound ro-vibrational states of H+3, DH+2, HD+2, D+3, and T+3: use of a non-direct product basis to compute the highest allowedJ> 0 states. Mol Phys 2013. [DOI: 10.1080/00268976.2013.818727] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
8
|
Jaquet R, Carrington T. Using a Nondirect Product Basis to Compute J > 0 Rovibrational States of H3+. J Phys Chem A 2013; 117:9493-500. [DOI: 10.1021/jp312027s] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ralph Jaquet
- Theoretische Chemie, Universität Siegen, D-57068 Siegen, Germany
| | - Tucker Carrington
- Chemistry Department, Queens’s University, Kingston, Ontario, K7L
3N6, Canada
| |
Collapse
|
9
|
|
10
|
Császár AG, Fábri C, Szidarovszky T, Mátyus E, Furtenbacher T, Czakó G. The fourth age of quantum chemistry: molecules in motion. Phys Chem Chem Phys 2012; 14:1085-106. [DOI: 10.1039/c1cp21830a] [Citation(s) in RCA: 176] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
11
|
Sutcliffe BT. An analysis of the role of the Born--Oppenheimer approximation in calculating rotational--vibrational interactions in molecules. Theor Chem Acc 2011. [DOI: 10.1007/s00214-011-0953-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
12
|
|
13
|
Olzmann M, Troe J. Approximate determination of rovibrational densities of states ρ(E,J) and numbers of states W(E,J). ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19940981210] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
14
|
Szidarovszky T, Császár AG, Czakó G. On the efficiency of treating singularities in triatomic variational vibrational computations. The vibrational states of H+3 up to dissociation. Phys Chem Chem Phys 2010; 12:8373-86. [DOI: 10.1039/c001124j] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
15
|
Silva BC, Barletta P, Munro JJ, Tennyson J. Resonant states of H3+ and D2H+. J Chem Phys 2008; 128:244312. [DOI: 10.1063/1.2945899] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
|
16
|
Wang XG, Carrington T. Vibrational Levels of Ar4: New Odd-Parity Bosonic States. J Phys Chem A 2007; 111:10220-5. [PMID: 17458945 DOI: 10.1021/jp070932q] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Vibrational levels of Ar4 are computed using the Lanczos algorithm and a large basis set. We find both even- and odd-parity states with wave functions that are invariant with respect to permutations of the Ar atoms. The odd-parity bosonic levels have not been computed previously. The even-parity levels are close to those obtained using the correlation-function Monte Carlo method (CFMC).
Collapse
Affiliation(s)
- Xiao-Gang Wang
- Département de chimie, Université de Montréal, C.P. 6128, succursale Centre-ville, Montréal (Québec) H3C 3J7, Canada.
| | | |
Collapse
|
17
|
|
18
|
Császár AG, Czakó G, Furtenbacher T, Mátyus E. Chapter 9 An Active Database Approach to Complete Rotational–Vibrational Spectra of Small Molecules. ANNUAL REPORTS IN COMPUTATIONAL CHEMISTRY 2007. [DOI: 10.1016/s1574-1400(07)03009-5] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
19
|
Czakó G, Furtenbacher T, Barletta P, Császár AG, Szalay V, Sutcliffe BT. Use of a nondirect-product basis for treating singularities in triatomic rotational–vibrational calculations. Phys Chem Chem Phys 2007; 9:3407-15. [PMID: 17664964 DOI: 10.1039/b701911d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A technique has been developed which in principle allows the determination of the full rotational-vibrational eigenspectrum of triatomic molecules by treating the important singularities present in the triatomic rotational-vibrational kinetic energy operator given in Jacobi coordinates and the R(1) embedding. The singular term related to the diatom-type coordinate, R(1), deemed to be unimportant for spectroscopic applications, is given no special attention. The work extends a previous [J. Chem. Phys., 2005, 122, 024101] vibration-only approach and employs a generalized finite basis representation (GFBR) resulting in a nonsymmetric Hamiltonian matrix [J. Chem. Phys., 2006, 124, 014110]. The basis set to be used is obtained by taking the direct product of a 1-D DVR basis, related to R(1), with a 5-D nondirect-product basis, the latter formed by coupling Bessel-DVR functions depending on the distance-type coordinate causing the singularity, associated Legendre polynomials depending on the Jacobi angle, and rotational functions depending on the three Euler angles. The robust implicitly restarted Arnoldi method within the ARPACK package is used for the determination of a number of eigenvalues of the nonsymmetric Hamiltonian matrix. The suitability of the proposed approach is shown by the determination of the rotational-vibrational energy levels of the ground electronic state of H(3)(+) somewhat above its barrier to linearity. Convergence of the eigenenergies is checked by an alternative approach, employing a Hamiltonian expressed in Radau coordinates, a standard direct-product basis, and no treatment of the singularities.
Collapse
Affiliation(s)
- Gábor Czakó
- Laboratory of Molecular Spectroscopy, Institute of Chemistry, Eötvös University, P. O. Box 32, H-1518 Budapest 112, Hungary
| | | | | | | | | | | |
Collapse
|
20
|
Tennyson J, Barletta P, Munro JJ, Silva BC. The role of asymptotic vibrational states in H3+. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2006; 364:2903-14; discussion 2915-6. [PMID: 17015378 DOI: 10.1098/rsta.2006.1890] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Calculations are discussed which characterize all the vibrational bound states of the H3+ and D2H+ molecular ions using a realistic ab initio potential energy surface. Graphical analysis and calculation of rotational constants show that both ions support a series of atom-diatom-like long-range states: asymptotic vibrational states. The role of these states in the H3+ system and other molecules is discussed. The vibrational calculations are extended above dissociation where the resulting (Feshbach) resonances are shown to be too short-lived to be of importance for the H3+ photodissociation spectrum.
Collapse
Affiliation(s)
- Jonathan Tennyson
- Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK.
| | | | | | | |
Collapse
|
21
|
Tremblay JC, Carrington T. Calculating vibrational energies and wave functions of vinylidene using a contracted basis with a locally reorthogonalized coupled two-term Lanczos eigensolver. J Chem Phys 2006; 125:094311. [PMID: 16965084 DOI: 10.1063/1.2234480] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We use a contracted basis+Lanczos eigensolver approach to compute vinylidene-like vibrational states of the acetylene-vinylidene system. To overcome problems caused by loss of orthogonality of the Lanczos vectors we reorthogonalize Lanczos vector and use a coupled two-term approach. The calculations are done in CC-HH diatom-diatom Jacobi coordinates which make it easy to compute states one irreducible representation at a time. The most costly parts of the calculation are parallelized and scale well. We estimate that the vinylidene energies we compute are converged to approximately 1 cm(-1).
Collapse
Affiliation(s)
- Jean Christophe Tremblay
- Département de chimie, Université de Montréal, C.P. 6128, succursale Centre-ville, Montréal (Québec) H3C 3J7, Canada.
| | | |
Collapse
|
22
|
García de Polavieja G, Fulton NG, Tennyson J. Quantum transport, recurrence and localization in H+ 3. Mol Phys 2006. [DOI: 10.1080/00268979600100451] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
| | - Nicholas G. Fulton
- b Department of Physics and Astronomy , University College London , Gower Street, London , WC1E 6BT , UK
| | - Jonathan Tennyson
- b Department of Physics and Astronomy , University College London , Gower Street, London , WC1E 6BT , UK
| |
Collapse
|
23
|
Alvarez-Collado J. On the derivation of the vibrational kinetic operator for polyatomic molecules in internal coordinates. Mol Phys 2006. [DOI: 10.1080/00268979400101641] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- J.R. Alvarez-Collado
- a Departamento Química-Física Aplicada , Universidad Autónoma , Madrid , 28049 , Spain
| |
Collapse
|
24
|
Munro JJ, Ramanlal J, Tennyson J, Mussa HY. Properties of high-lying vibrational states of the molecular ion. Mol Phys 2006. [DOI: 10.1080/00268970500399648] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
25
|
Czakó G, Szalay V, Császár AG, Furtenbacher T. Treating singularities present in the Sutcliffe-Tennyson vibrational Hamiltonian in orthogonal internal coordinates. J Chem Phys 2005; 122:024101. [PMID: 15638566 DOI: 10.1063/1.1827594] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Two methods are developed, when solving the related time-independent Schrodinger equation (TISE), to cope with the singular terms of the vibrational kinetic energy operator of a triatomic molecule given in orthogonal internal coordinates. The first method provides a mathematically correct treatment of all singular terms. The vibrational eigenfunctions are approximated by linear combinations of functions of a three-dimensional nondirect-product basis, where basis functions are formed by coupling Bessel-DVR functions, where DVR stands for discrete variable representation, depending on distance-type coordinates and Legendre polynomials depending on angle bending. In the second method one of the singular terms related to a distance-type coordinate, deemed to be unimportant for spectroscopic applications, is given no special treatment. Here the basis set is obtained by taking the direct product of a one-dimensional DVR basis with a two-dimensional nondirect-product basis, the latter formed by coupling Bessel-DVR functions and Legendre polynomials. With the basis functions defined, matrix representations of the TISE are set up and solved numerically to obtain the vibrational energy levels of H3+. The numerical calculations show that the first method treating all singularities is computationally inefficient, while the second method treating properly only the singularities having physical importance is quite efficient.
Collapse
Affiliation(s)
- Gábor Czakó
- Department of Theoretical Chemistry, Eötvös University, H-1518 Budapest 112, PO Box 32, Hungary
| | | | | | | |
Collapse
|
26
|
|
27
|
Kozin IN, Law MM, Hutson JM, Tennyson J. Calculating energy levels of isomerizing tetra-atomic molecules. I. The rovibrational bound states of Ar2HF. J Chem Phys 2003. [DOI: 10.1063/1.1545109] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
28
|
Gerber RB, Chaban GM, Gregurick SK, Brauer B. Vibrational spectroscopy and the development of new force fields for biological molecules. Biopolymers 2003; 68:370-82. [PMID: 12601796 DOI: 10.1002/bip.10293] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The role of vibrational spectroscopy in the testing of force fields of biological molecules and in the determination of improved force fields is discussed. Analysis shows that quantitative testing of potential energy surfaces by comparison with spectroscopic data generally requires calculations that include anharmonic couplings between different vibrational modes. Applications of the vibrational self-consistent field (VSCF) method to calculations of spectroscopy of biological molecules are presented, and comparison with experiment is used to determine the merits and flaws of various types of force fields. The main conclusions include the following: (1) Potential surfaces from ab initio methods at the level of MP2 yield very satisfactory agreement with spectroscopic experimental data. (2) By the test of spectroscopy, ab initio force fields are considerably superior to the standard versions of force fields such as AMBER or OPLS. (3) Much of the spectroscopic weakness of AMBER and OPLS is due to incorrect description of anharmonic coupling between different vibrational modes. (4) Potential surfaces of the QM/MM (Quantum Mechanics/Molecular Mechanics) type, and potentials based on improved versions of semi-empirical electronic structure theory, which are feasible for large biological molecules, yield encouraging results by the test of vibrational spectroscopy.
Collapse
Affiliation(s)
- R B Gerber
- Department of Physical Chemistry and Fritz Haber Research Center, The Hebrew University, Jerusalem 91904, Israel.
| | | | | | | |
Collapse
|
29
|
Kostin MA, Polyansky OL, Tennyson J, Mussa HY. Rotation-vibration states of H3+ at dissociation. J Chem Phys 2003. [DOI: 10.1063/1.1539034] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
30
|
SCHIFFELS P, ALIJAH A, HINZE J. Rovibrational states of H+3. Part 1: The energy region below 9000 cm−1and modelling of the non-adiabatic effects. Mol Phys 2003. [DOI: 10.1080/00268970210158687] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
31
|
Kostin MA, Polyansky OL, Tennyson J. Calculations of rotation–vibration states with thezaxis perpendicular to the plane: High accuracy results for H3+. J Chem Phys 2002. [DOI: 10.1063/1.1464540] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
|
32
|
Tachikawa H. Full Dimensional Ab Initio Dynamics Calculations of Electron Capture Processes of the H4+ Ion. J Phys Chem A 2000. [DOI: 10.1021/jp0005219] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Hiroto Tachikawa
- Division of Molecular Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| |
Collapse
|
33
|
Iyengar SS, Parker GA, Kouri DJ, Hoffman DK. Symmetry-adapted distributed approximating functionals: Theory and application to the ro-vibrational states of H3+. J Chem Phys 1999. [DOI: 10.1063/1.478962] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
|
34
|
Nakamura H, Kato S. Theoretical study on the spin-forbidden predissociation reaction of N2O: Ab initio potential energy surfaces and quantum dynamics calculations. J Chem Phys 1999. [DOI: 10.1063/1.478954] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
|
35
|
Salzgeber RF, Mandelshtam VA, Schlier C, Taylor HS. All the nonadiabatic (J=0) bound states of NO2. J Chem Phys 1999. [DOI: 10.1063/1.478265] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
|
36
|
Wright NJ, Hutson JM. Regular and irregular vibrational states: Localized anharmonic modes in Ar3. J Chem Phys 1999. [DOI: 10.1063/1.478057] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
37
|
Skokov S, Qi J, Bowman JM, Yang CY, Gray SK, Peterson KA, Mandelshtam VA. Accurate variational calculations and analysis of the HOCl vibrational energy spectrum. J Chem Phys 1998. [DOI: 10.1063/1.477723] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
38
|
Nakamura H, Kato S. Quantum calculation of the vibrational energy level structure of N2O based on ab initio potential surface. Chem Phys Lett 1998. [DOI: 10.1016/s0009-2614(98)01137-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
39
|
Salzgeber RF, Mandelshtam V, Schlier C, Taylor HS. All the adiabatic bound states of NO2. J Chem Phys 1998. [DOI: 10.1063/1.476636] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
|
40
|
Yu HG. An efficient grid calculation of vibrational states for H3∗ with geometric phase in hyperspherical coordinates. Chem Phys Lett 1997. [DOI: 10.1016/s0009-2614(97)01253-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
41
|
Sadovskií DA, Zhilinskií BI. Counting levels within vibrational polyads: Generating function approach. J Chem Phys 1995. [DOI: 10.1063/1.469836] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
42
|
Dobbyn AJ, Stumpf M, Keller H, Schinke R. Theoretical study of the unimolecular dissociation HO2→H+O2. I. Calculation of the bound states of HO2up to the dissociation threshold and their statistical analysis. J Chem Phys 1995. [DOI: 10.1063/1.469884] [Citation(s) in RCA: 85] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
43
|
Schlier C. Comment on: ‘‘The conservation of quantum zero‐point energies in classical trajectory simulations’’ [J. Chem. Phys. 102, 1705 (1995)]. J Chem Phys 1995. [DOI: 10.1063/1.469724] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
|
44
|
Ramón Álvarez‐Collado J, Aguado A, Paniagua M. The vibrational structure of H+4 and D+4. J Chem Phys 1995. [DOI: 10.1063/1.469303] [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
|
45
|
Stephens JA, Greene CH. Rydberg state dynamics of rotating, vibrating H3 and the Jahn–Teller effect. J Chem Phys 1995. [DOI: 10.1063/1.468890] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
46
|
Troe J. Simplified models for anharmonic numbers and densities of vibrational states. I. Application to NO2 and H3+. Chem Phys 1995. [DOI: 10.1016/0301-0104(94)00358-h] [Citation(s) in RCA: 80] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
47
|
|
48
|
Wolniewicz L, Hinze J. Rotation–vibrational states of H+3 computed using hyperspherical coordinates and harmonics. J Chem Phys 1994. [DOI: 10.1063/1.467947] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
|
49
|
Szalay V, Nemes L. The discrete variable representation of the rotational-vibrational Hamiltonian of triatomic molecules. Chem Phys Lett 1994. [DOI: 10.1016/0009-2614(94)01229-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
50
|
Bramley MJ, Carrington T. Calculation of triatomic vibrational eigenstates: Product or contracted basis sets, Lanczos or conventional eigensolvers? What is the most efficient combination? J Chem Phys 1994. [DOI: 10.1063/1.468110] [Citation(s) in RCA: 127] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|