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Andresen M, Schöngen D, Kleiner I, Schwell M, Stahl W, Nguyen HVL. Internal Rotation of the Acetyl Methyl Group in Methyl Alkyl Ketones: The Microwave Spectrum of Octan‐2‐one. Chemphyschem 2020; 21:2206-2216. [DOI: 10.1002/cphc.202000522] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 07/13/2020] [Indexed: 11/06/2022]
Affiliation(s)
- Maike Andresen
- Institute of Physical Chemistry RWTH Aachen University Landoltweg 2 52074 Aachen Germany
- Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA) CNRS UMR Université Paris-Est Créteil Université de Paris Institute Pierre Simon Laplace 61 avenue du Général de Gaulle 94010 Créteil France
| | - Damian Schöngen
- Institute of Physical Chemistry RWTH Aachen University Landoltweg 2 52074 Aachen Germany
| | - Isabelle Kleiner
- Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA) CNRS UMR Université Paris-Est Créteil Université de Paris Institute Pierre Simon Laplace 61 avenue du Général de Gaulle 94010 Créteil France
| | - Martin Schwell
- Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA) CNRS UMR Université Paris-Est Créteil Université de Paris Institute Pierre Simon Laplace 61 avenue du Général de Gaulle 94010 Créteil France
| | - Wolfgang Stahl
- Institute of Physical Chemistry RWTH Aachen University Landoltweg 2 52074 Aachen Germany
| | - Ha Vinh Lam Nguyen
- Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA) CNRS UMR Université Paris-Est Créteil Université de Paris Institute Pierre Simon Laplace 61 avenue du Général de Gaulle 94010 Créteil France
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de Aguiar Filho SQ, Costa AMF, Ribeiro IHS, Custodio R, Pereira DH. Theoretical study of the internal rotational barriers of fluorine, chlorine, bromine, and iodine-substituted ethanes. COMPUT THEOR CHEM 2019. [DOI: 10.1016/j.comptc.2019.112589] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Haghighi Mood K, Lüchow A. Full Wave Function Optimization with Quantum Monte Carlo and Its Effect on the Dissociation Energy of FeS. J Phys Chem A 2017; 121:6165-6171. [DOI: 10.1021/acs.jpca.7b05798] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kaveh Haghighi Mood
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, 52056 Aachen, Germany
| | - Arne Lüchow
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, 52056 Aachen, Germany
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Lutsyshyn Y. Weakly parametrized Jastrow ansatz for a strongly correlated Bose system. J Chem Phys 2017; 146:124102. [PMID: 28388103 DOI: 10.1063/1.4978707] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
We consider the Jastrow pair-product wavefunction for strongly correlated Bose systems, in our case liquid helium-4. An ansatz is proposed for the pair factors which consist of a numeric solution to a modified and parametrized pair scattering equation. We consider a number of such simple one-variable parametrizations. Additionally, we allow for a parametrizeable cutoff of the pair factors and for the addition of a long-range phonon tail. This approach results in many-body wavefunctions that have between just one and three variational parameters. Calculation of observables is carried with the variational Monte Carlo method. We find that such a simple parametrization is sufficient to produce results that are comparable in quality to the best available two-body factors for helium. For the two-parameter wavefunction, we find variational energies of -6.04 K per particle for a system of one thousand particles. It is also shown that short-range two-body correlations are reproduced in good detail by the two- and three-parameter functions.
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Subramanian G, Mathew N, Leiding J. A generalized force-modified potential energy surface for mechanochemical simulations. J Chem Phys 2015; 143:134109. [PMID: 26450294 DOI: 10.1063/1.4932103] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Gopinath Subramanian
- School of Polymers and High Performance Materials, University of Southern Mississippi, Hattiesburg, Mississippi 39402, USA
| | - Nithin Mathew
- Department of Chemistry, University of Missouri-Columbia, Columbia, Missouri 65211, USA
| | - Jeff Leiding
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
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Jeszenszki P, Surján PR, Szabados Á. Spin Symmetry and Size Consistency of Strongly Orthogonal Geminals. J Chem Theory Comput 2015; 11:3096-103. [DOI: 10.1021/acs.jctc.5b00333] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Péter Jeszenszki
- Laboratory of Theoretical
Chemistry, Institute of Chemistry, Loránd Eötvös University, 1518 Budapest, POB 32, Hungary
| | - Péter R. Surján
- Laboratory of Theoretical
Chemistry, Institute of Chemistry, Loránd Eötvös University, 1518 Budapest, POB 32, Hungary
| | - Ágnes Szabados
- Laboratory of Theoretical
Chemistry, Institute of Chemistry, Loránd Eötvös University, 1518 Budapest, POB 32, Hungary
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Azizi S, Ulrich G, Guglielmino M, le Calvé S, Hagon JP, Harriman A, Ziessel R. Photoinduced Proton Transfer Promoted by Peripheral Subunits for Some Hantzsch Esters. J Phys Chem A 2014; 119:39-49. [DOI: 10.1021/jp5078246] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sébastien Azizi
- Institut
de Chimie et Procédés pour l’Energie, l’Environnement
et la Santé (ICPEES), Laboratoire de Chimie Moléculaire
et Spectroscopies Avancées (ICPEES-LCOSA), UMR 7515 au CNRS, Ecole Européenne de Chimie, Polymères et Matériaux, 25 rue Becquerel, 67087 Strasbourg Cedex 02, France
| | - Gilles Ulrich
- Institut
de Chimie et Procédés pour l’Energie, l’Environnement
et la Santé (ICPEES), Laboratoire de Chimie Moléculaire
et Spectroscopies Avancées (ICPEES-LCOSA), UMR 7515 au CNRS, Ecole Européenne de Chimie, Polymères et Matériaux, 25 rue Becquerel, 67087 Strasbourg Cedex 02, France
| | - Maud Guglielmino
- Institut
de Chimie, Procédés, Catalyse, Energie, Environnement
et Santé, Physico-chimie de l’atmosphère, ICPEES-UMR 7515 CNRS-UdS, 1 rue Blessig, 67084 Strasbourg Cedex 02, France
| | - Stéphane le Calvé
- Institut
de Chimie, Procédés, Catalyse, Energie, Environnement
et Santé, Physico-chimie de l’atmosphère, ICPEES-UMR 7515 CNRS-UdS, 1 rue Blessig, 67084 Strasbourg Cedex 02, France
| | - Jerry P. Hagon
- Molecular
Photonics Laboratory, School of Chemistry, Newcastle University, Bedson Building, Newcastle upon Tyne, NE1 7RU, U.K
| | - Anthony Harriman
- Molecular
Photonics Laboratory, School of Chemistry, Newcastle University, Bedson Building, Newcastle upon Tyne, NE1 7RU, U.K
| | - Raymond Ziessel
- Institut
de Chimie et Procédés pour l’Energie, l’Environnement
et la Santé (ICPEES), Laboratoire de Chimie Moléculaire
et Spectroscopies Avancées (ICPEES-LCOSA), UMR 7515 au CNRS, Ecole Européenne de Chimie, Polymères et Matériaux, 25 rue Becquerel, 67087 Strasbourg Cedex 02, France
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Kannengießer R, Klahm S, Vinh Lam Nguyen H, Lüchow A, Stahl W. The effects of methyl internal rotation and 14N quadrupole coupling in the microwave spectra of two conformers of N,N-diethylacetamide. J Chem Phys 2014; 141:204308. [DOI: 10.1063/1.4901980] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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