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Papp D, Sarka J, Szidarovszky T, Császár AG, Mátyus E, Hochlaf M, Stoecklin T. Complex rovibrational dynamics of the Ar·NO + complex. Phys Chem Chem Phys 2017; 19:8152-8160. [PMID: 28225106 DOI: 10.1039/c6cp07731e] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Rotational-vibrational states of the Ar·NO+ cationic complex are computed, below, above, and well above the complex's first dissociation energy, using variational nuclear motion and close-coupling scattering computations. The HSLH potential energy surface used in this study (J. Chem. Phys., 2011, 135, 044312) is characterized by a first dissociation energy of D0 = 887.0 cm-1 and supports 200 bound vibrational states. The bound-state vibrational energies and the corresponding wave functions allow the interpretation of the scarcely available experimental results about the intermonomer vibrational motion of the complex. A very large number of long-lived quasibound combination states of the three vibrational modes, exhibiting a very similar energy-level structure as that of the bound states, are found embedded in the continuum. Additional short-lived resonance states are also identified and their properties are analyzed.
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Affiliation(s)
- Dóra Papp
- MTA-ELTE Complex Chemical Systems Research Group, P.O. Box 32, H-1518 Budapest 112, Hungary.
| | - János Sarka
- MTA-ELTE Complex Chemical Systems Research Group, P.O. Box 32, H-1518 Budapest 112, Hungary.
| | - Tamás Szidarovszky
- MTA-ELTE Complex Chemical Systems Research Group, P.O. Box 32, H-1518 Budapest 112, Hungary.
| | - Attila G Császár
- MTA-ELTE Complex Chemical Systems Research Group, P.O. Box 32, H-1518 Budapest 112, Hungary.
| | - Edit Mátyus
- Institute of Chemistry, Eötvös University, Pázmány Péter sétány 1/A, H-1117 Budapest, Hungary
| | - Majdi Hochlaf
- Université Paris-Est, Laboratoire Modélisation et Simulation Multi Echelle, MSME UMR 8208 CNRS, 5 bd Descartes, F-77454 Marne-la-Vallée, France
| | - Thierry Stoecklin
- Institut des Sciences Moléculaires, Université de Bordeaux, CNRS UMR 5255, 33405 Talence Cedex, France.
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Halvick P, Stoecklin T, Lique F, Hochlaf M. Explicitly correlated treatment of the Ar–NO+ cation. J Chem Phys 2011; 135:044312. [PMID: 21806124 DOI: 10.1063/1.3614502] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Philippe Halvick
- Institut des Sciences Moléculaires, Université de Bordeaux, CNRS UMR 5255, 33405 Talence Cedex, France.
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Ayles VL, Hammond CJ, Bergeron DE, Richards OJ, Wright TG. Zero electron kinetic energy spectroscopy of the para-fluorotoluene cation. J Chem Phys 2007; 126:244304. [PMID: 17614546 DOI: 10.1063/1.2741542] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Zero electron kinetic energy (ZEKE) spectroscopy is employed to gain information on the vibrational energy levels of the para-fluorotoluene (pFT) cation. Vibrationally resolved spectra are obtained following excitation through a range of intermediate vibrational energy levels in the S1 state. These spectra allow the observation of different cationic vibrational modes, whose assignment is achieved both from a knowledge of the S1 vibrational states and also by comparison with density functional calculations. In one notable case, clean ZEKE spectra were obtained from two overlapped S1 features. From the authors' data, the adiabatic ionization energy of pFT was derived as 70,946+/-4 cm(-1). The information on the cationic energy levels obtained will be useful in untangling the intramolecular vibrational redistribution dynamics of pFT in the S1 state.
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Affiliation(s)
- Victoria L Ayles
- School of Chemistry, University of Nottingham, Nottingham NG7 2RD, United Kingdom
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Kamiya M, Hirata S. Higher-order equation-of-motion coupled-cluster methods for ionization processes. J Chem Phys 2006; 125:074111. [PMID: 16942326 DOI: 10.1063/1.2244570] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Compact algebraic equations defining the equation-of-motion coupled-cluster (EOM-CC) methods for ionization potentials (IP-EOM-CC) have been derived and computer implemented by virtue of a symbolic algebra system largely automating these processes. Models with connected cluster excitation operators truncated after double, triple, or quadruple level and with linear ionization operators truncated after two-hole-one-particle (2h1p), three-hole-two-particle (3h2p), or four-hole-three-particle (4h3p) level (abbreviated as IP-EOM-CCSD, CCSDT, and CCSDTQ, respectively) have been realized into parallel algorithms taking advantage of spin, spatial, and permutation symmetries with optimal size dependence of the computational costs. They are based on spin-orbital formalisms and can describe both alpha and beta ionizations from open-shell (doublet, triplet, etc.) reference states into ionized states with various spin magnetic quantum numbers. The application of these methods to Koopmans and satellite ionizations of N2 and CO (with the ambiguity due to finite basis sets eliminated by extrapolation) has shown that IP-EOM-CCSD frequently accounts for orbital relaxation inadequately and displays errors exceeding a couple of eV. However, these errors can be systematically reduced to tenths or even hundredths of an eV by IP-EOM-CCSDT or CCSDTQ. Comparison of spectroscopic parameters of the FH+ and NH+ radicals between IP-EOM-CC and experiments has also underscored the importance of higher-order IP-EOM-CC treatments. For instance, the harmonic frequencies of the A 2Sigma- state of NH+ are predicted to be 1285, 1723, and 1705 cm(-1) by IP-EOM-CCSD, CCSDT, and CCSDTQ, respectively, as compared to the observed value of 1707 cm(-1). The small adiabatic energy separation (observed 0.04 eV) between the X 2Pi and a 4Sigma- states of NH+ also requires IP-EOM-CCSDTQ for a quantitative prediction (0.06 eV) when the a 4Sigma- state has the low-spin magnetic quantum number (s(z) = 1/2). When the state with s(z) = 3/2 is sought, the energy separations converge much more rapidly with the IP-EOM-CCSD value (0.03 eV) already being close to the observed (0.04 eV).
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Affiliation(s)
- Muneaki Kamiya
- Quantum Theory Project, Department of Chemistry, University of Florida, Gainesville, Florida 32611-8435, USA
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Hobza P, Zahradník R, Müller-Dethlefs K. The World of Non-Covalent Interactions: 2006. ACTA ACUST UNITED AC 2006. [DOI: 10.1135/cccc20060443] [Citation(s) in RCA: 166] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The review focusses on the fundamental importance of non-covalent interactions in nature by illustrating specific examples from chemistry, physics and the biosciences. Laser spectroscopic methods and both ab initio and molecular modelling procedures used for the study of non-covalent interactions in molecular clusters are briefly outlined. The role of structure and geometry, stabilization energy, potential and free energy surfaces for molecular clusters is extensively discussed in the light of the most advanced ab initio computational results for the CCSD(T) method, extrapolated to the CBS limit. The most important types of non-covalent complexes are classified and several small and medium size non-covalent systems, including H-bonded and improper H-bonded complexes, nucleic acid base pairs, and peptides and proteins are discussed with some detail. Finally, we evaluate the interpretation of experimental results in comparison with state of the art theoretical models: this is illustrated for phenol...Ar, the benzene dimer and nucleic acid base pairs. A review with 270 references.
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Cockett MCR. Photoelectron spectroscopy without photoelectrons: Twenty years of ZEKE spectroscopy. Chem Soc Rev 2005; 34:935-48. [PMID: 16239995 DOI: 10.1039/b505794a] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Zero Kinetic Energy (ZEKE) spectroscopy, originally developed as a high resolution form of photoelectron spectroscopy, promised a means to the unambiguous determination of ionic (ro)vibrational states. Since its original development, it has spawned numerous methodological offshoots and has become one of the default methods of choice for high resolution spectroscopy of the ion. This tutorial review describes the historical development of the method, provides some insight into how it works and assesses the impact of the technique by reviewing some of the highlights of the past 20 years as well as some of the more recent developments and applications.
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Affiliation(s)
- Martin C R Cockett
- Department of Chemistry, University of York, Heslington, York, UK YO24 4AA.
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Müller-Dethlefs K, Hobza P. Noncovalent interactions: a challenge for experiment and theory. Chem Rev 2000; 100:143-68. [PMID: 11749236 DOI: 10.1021/cr9900331] [Citation(s) in RCA: 1316] [Impact Index Per Article: 54.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- K Müller-Dethlefs
- Department of Chemistry, University of York, Heslington, York YO10 5DD, United Kingdom, and J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, 182 23 Praha, Czech Republic
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A new detection scheme for synchronous, high resolution ZEKE and MATI spectroscopy demonstrated on the Phenol·Ar complex. Chem Phys Lett 1999. [DOI: 10.1016/s0009-2614(99)01193-8] [Citation(s) in RCA: 103] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Geppert WD, Dessent CEH, Müller-Dethlefs K. ZEKE and Hole-Burning Spectroscopy of the Rotational Isomers of Resorcinol·CO. J Phys Chem A 1999. [DOI: 10.1021/jp992566j] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wolf D. Geppert
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
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Haines SR, Dessent CEH, Müller-Dethlefs K. Mass analyzed threshold ionization of phenol⋅CO: Intermolecular binding energies of a hydrogen-bonded complex. J Chem Phys 1999. [DOI: 10.1063/1.479463] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Soldán P, Lee EPF, Wright TG. Spectroscopy and Thermodynamics of NaO+(X3Σ-): Relevance to Atmospheric Chemistry. J Phys Chem A 1998. [DOI: 10.1021/jp982750p] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pavel Soldán
- Department of Chemistry, University of Southampton, Highfield, Southampton, U.K. SO17 1BJ, J. Heyrovský Institute of Physical Chemistry, Academy of Science of the Czech Republic, 182 23 Prague 8, Dolejškova 3, Czech Republic, and Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hung Hom, Hong Kong
| | - Edmond P. F. Lee
- Department of Chemistry, University of Southampton, Highfield, Southampton, U.K. SO17 1BJ, J. Heyrovský Institute of Physical Chemistry, Academy of Science of the Czech Republic, 182 23 Prague 8, Dolejškova 3, Czech Republic, and Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hung Hom, Hong Kong
| | - Timothy G. Wright
- Department of Chemistry, University of Southampton, Highfield, Southampton, U.K. SO17 1BJ, J. Heyrovský Institute of Physical Chemistry, Academy of Science of the Czech Republic, 182 23 Prague 8, Dolejškova 3, Czech Republic, and Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hung Hom, Hong Kong
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