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Sardar S. An Exhaustive Quantum-Classical Study of C 6F 6+ Using the Newly Formulated Parallel TDDVR Method. J Phys Chem A 2024; 128:5777-5795. [PMID: 38979982 DOI: 10.1021/acs.jpca.4c02108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/10/2024]
Abstract
We recently implemented our parallelized quantum-classical dynamical approach, known as the Time-Dependent Discrete Variable Representation (TDDVR) method, which is applied to the spectroscopically important hexafluorobenzene (HFBz) radical cation, where several conical intersections exist in their seven lowest excited electronic states (S11B2u, S21E1g, S31B1u, S41E1u, and S51A2u) considering degeneracy among potential energy surfaces (PESs), to demonstrate their various dynamical aspects. This new parallel version shows almost linear scalability with increasing number of computing processors. To get photoelectron (PE) spectra, Mass-Analyzed Threshold Ionization (MATI) spectra, population dynamics, and many other dynamical observables, the first-principles dynamics is applied at the state-of-the-art level to the corresponding Hamiltonian, where the Jahn-Teller (JT) and pseudo-Jahn-Teller (PJT) type interactions are involved in those coupled seven electronic states. The quantum-classical method is used to thoroughly analyze the effects of these couplings on the nuclear dynamics of the involved electronic states, and the findings are compared with those observables obtained from experiments. Intrinsic dynamical properties are explained using the reduced densities of the wave packet (WP) in a coupled electronic manifold. The PE and MATI spectra of HFBz computed using TDDVR are found to be in good agreement with earlier experimental data and other theoretically simulated spectra.
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Affiliation(s)
- Subhankar Sardar
- Department of Chemistry, Bhatter College, Dantan, P.O. Dantan, Paschim Medinipur, Pin 721426, India
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2
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Structure and dynamics of electronically excited molecular systems. WIRES COMPUTATIONAL MOLECULAR SCIENCE 2022. [DOI: 10.1002/wcms.1576] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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3
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Bracker M, Kubitz MK, Czekelius C, Marian CM, Kleinschmidt M. Computer‐Aided Design of Fluorinated Flavin Derivatives by Modulation of Intersystem Crossing and Fluorescence. CHEMPHOTOCHEM 2022. [DOI: 10.1002/cptc.202200040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mario Bracker
- Institute of Theoretical and Computational Chemistry Heinrich-Heine-University Düsseldorf D-40204 Düsseldorf Germany
| | - Mira K. Kubitz
- Institute of Organic and Macromolecular Chemistry Heinrich-Heine-University Düsseldorf D-40204 Düsseldorf Germany
| | - Constantin Czekelius
- Institute of Organic and Macromolecular Chemistry Heinrich-Heine-University Düsseldorf D-40204 Düsseldorf Germany
| | - Christel M. Marian
- Institute of Theoretical and Computational Chemistry Heinrich-Heine-University Düsseldorf D-40204 Düsseldorf Germany
| | - Martin Kleinschmidt
- Institute of Theoretical and Computational Chemistry Heinrich-Heine-University Düsseldorf D-40204 Düsseldorf Germany
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4
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Robinson D, Alarfaji SS, Hirst JD. Benzene, Toluene, and Monosubstituted Derivatives: Diabatic Nature of the Oscillator Strengths of S 1 ← S 0 Transitions. J Phys Chem A 2021; 125:5237-5245. [PMID: 34132093 PMCID: PMC8279645 DOI: 10.1021/acs.jpca.1c01685] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 05/05/2021] [Indexed: 11/28/2022]
Abstract
For benzene, toluene, aniline, fluorobenzene, and phenol, even sophisticated treatments of electron correlation, such as MRCI and XMS-CASPT2 calculations, show oscillator strengths typically lower than experiment. Inclusion of a simple pseudo-diabatization approach to perturb the S1 state with approximate vibronic coupling to the S2 state for each molecule results in more accurate oscillator strengths. Their absolute values agree better with experiment for all molecules except aniline. When the coupling between the S1 and S2 states is strong at the S0 geometry, the simple diabatization scheme performs less well with respect to the oscillator strengths relative to the adiabatic values. However, we expect the scheme to be useful in many cases where the coupling is weak to moderate (where the maximum component of the coupling has a magnitude less than 1.5 au). Such calculations give an insight into the effects of vibronic coupling of excited states on UV/vis spectra.
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Affiliation(s)
- David Robinson
- Department
of Chemistry and Forensics, School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham NG11 8NS, United
Kingdom
| | - Saleh S. Alarfaji
- School
of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - Jonathan D. Hirst
- School
of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
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5
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Kanakati AK, Mahapatra S. Vibronic coupling in the first six electronic states of pentafluorobenzene radical cation: Radiative emission and nonradiative decay. J Chem Phys 2021; 154:054313. [PMID: 33557553 DOI: 10.1063/5.0039923] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Nuclear dynamics in the first six vibronically coupled electronic states of pentafluorobenzene radical cation is studied with the aid of the standard vibronic coupling theory and quantum dynamical methods. A model 6 × 6 vibronic Hamiltonian is constructed in a diabatic electronic basis using symmetry selection rules and a Taylor expansion of the elements of the electronic Hamiltonian in terms of the normal coordinate of vibrational modes. Extensive ab initio quantum chemistry calculations are carried out for the adiabatic electronic energies to establish the diabatic potential energy surfaces and their coupling surfaces. Both time-independent and time-dependent quantum mechanical methods are employed to perform nuclear dynamics calculations. The vibronic spectrum of the electronic states is calculated, assigned, and compared with the available experimental results. Internal conversion dynamics of electronic states is examined to assess the impact of various couplings on the nuclear dynamics. The impact of increasing fluorination of the parent benzene radical cation on its radiative emission is examined and discussed.
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Affiliation(s)
| | - S Mahapatra
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
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Sen S, Mondal T. The Jahn–Teller effect in the ground electronic state of the tetrafluoromethane cation before dissociation: a promoter of the anisotropic fragmentation. Mol Phys 2019. [DOI: 10.1080/00268976.2019.1569270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Sindhuja Sen
- Department of Chemistry, Birla Institute of Technology & Science, Goa, India
| | - T. Mondal
- Department of Chemistry, Birla Institute of Technology & Science, Goa, India
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Sala M, Egorova D. Imaging large amplitude out-of-plane motion in photoexcited pentafluorobenzene using time-resolved photoelectron spectroscopy: a computational study. Photochem Photobiol Sci 2018; 17:1036-1048. [PMID: 29999080 DOI: 10.1039/c8pp00051d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Excited-state dynamics of pentafluorobenzene is studied in detail for a quartic vibronic coupling model including the six b1 vibrational modes of the molecule and the two lowest excited electronic states. The study analyzes the influence of the large-amplitude out-of-plane vibrational motion on the electronic dynamics and extends to the simulation of the emerging time-resolved photoelectron spectra. The mapping of coherent non-separable electron-nuclear motion into oscillatory photoelectron signals is discussed.
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Affiliation(s)
- Matthieu Sala
- Institut für Physikalische Chemie, Christian-Albrechts-Universität zu Kiel, Olshausenstr. 40, D-24098 Kiel, Germany.
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Rajak K, Ghosh A, Mahapatra S. Photophysics of phenol and pentafluorophenol: The role of nonadiabaticity in the optical transition to the lowest bright 1ππ* state. J Chem Phys 2018; 148:054301. [DOI: 10.1063/1.5015986] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Karunamoy Rajak
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
| | - Arpita Ghosh
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
| | - S. Mahapatra
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
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9
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Mondal T. On the higher-order T2 ⊗ (e + t2) Jahn–Teller coupling effects in the photodetachment spectrum of the alanate anion (AlH4−). Phys Chem Chem Phys 2018; 20:9401-9410. [DOI: 10.1039/c7cp08113h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The higher-order JT coupling terms (beyond the standard second-order JT theory) are important to understand the first photoelectron band of AlH4.
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Affiliation(s)
- T. Mondal
- Department of Chemistry, Birla Institute of Technology & Science
- India
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Hüter O, Sala M, Neumann H, Zhang S, Studzinski H, Egorova D, Temps F. Long-lived coherence in pentafluorobenzene as a probe of ππ* – πσ* vibronic coupling. J Chem Phys 2016; 145:014302. [DOI: 10.1063/1.4954705] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- O. Hüter
- Institute of Physical Chemistry, Christian-Albrechts-University Kiel, Olshausenstr. 40, D-24098 Kiel, Germany
| | - M. Sala
- Institute of Physical Chemistry, Christian-Albrechts-University Kiel, Olshausenstr. 40, D-24098 Kiel, Germany
| | - H. Neumann
- Institute of Physical Chemistry, Christian-Albrechts-University Kiel, Olshausenstr. 40, D-24098 Kiel, Germany
| | - S. Zhang
- Institute of Physical Chemistry, Christian-Albrechts-University Kiel, Olshausenstr. 40, D-24098 Kiel, Germany
| | - H. Studzinski
- Institute of Physical Chemistry, Christian-Albrechts-University Kiel, Olshausenstr. 40, D-24098 Kiel, Germany
| | - D. Egorova
- Institute of Physical Chemistry, Christian-Albrechts-University Kiel, Olshausenstr. 40, D-24098 Kiel, Germany
| | - F. Temps
- Institute of Physical Chemistry, Christian-Albrechts-University Kiel, Olshausenstr. 40, D-24098 Kiel, Germany
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11
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Palmer MH, Ridley T, Vrønning Hoffmann S, Jones NC, Coreno M, de Simone M, Grazioli C, Zhang T, Biczysko M, Baiardi A, Peterson KA. Combined theoretical and experimental study of the valence, Rydberg and ionic states of fluorobenzene. J Chem Phys 2016; 144:204305. [PMID: 27250304 DOI: 10.1063/1.4949548] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
New photoelectron spectra (PES) and ultra violet (UV) and vacuum UV (VUV) absorption spectra of fluorobenzene recorded at higher resolution than previously, have been combined with mass-resolved (2 + 1) and (3 + 1) resonance enhanced multiphoton ionization (REMPI) spectra; this has led to the identification of numerous Rydberg states. The PES have been compared with earlier mass-analyzed threshold ionization and photoinduced Rydberg ionization (PIRI) spectra to give an overall picture of the ionic state sequence. The analysis of these spectra using both equations of motion with coupled cluster singles and doubles (EOM-CCSD) configuration interaction and time dependent density functional theory (TDDFT) calculations have been combined with vibrational analysis of both the hot and cold bands of the spectra, in considerable detail. The results extend several earlier studies on the vibronic coupling leading to conical intersections between the X(2)B1 and A(2)A2 states, and a further trio (B, C, and D) of states. The conical intersection of the X and A states has been explicitly identified, and its structure and energetics evaluated. The energy sequence of the last group is only acceptable to the present study if given as B(2)B2<C(2)B1<D(2)A1, a conclusion which is in agreement with most previous EOM-CCSD and other calculations. However, this symmetry ordering of the B and C states forces reconsideration of the nature of the PIRI spectrum. The coupling between these two states is induced by the a2 modes, ν12 and ν14 and we propose that the 14(1) band is observed in the B(2)B2 band in the PES for the first time, because of the improved resolution. This same assignment is given to the lowest energy band in the PIRI spectrum which was previously assigned as the origin band and further conclude that the entire PIRI spectrum is induced by ν12 and ν14. The relative intensities of the various Rydberg state peaks in the VUV absorption and REMPI spectra of fluorobenzene are very similar to those observed in the equivalent spectra of benzene.
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Affiliation(s)
- Michael H Palmer
- School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, Scotland EH9 3FJ, United Kingdom
| | - Trevor Ridley
- School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, Scotland EH9 3FJ, United Kingdom
| | - Søren Vrønning Hoffmann
- ISA, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
| | - Nykola C Jones
- ISA, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
| | - Marcello Coreno
- CNR-ISM, Basovizza Area Science Park, 1-34149 Trieste, Italy
| | | | | | - Teng Zhang
- Department of Physics and Astronomy, University of Uppsala, Uppsala, Sweden
| | - Malgorzata Biczysko
- International Centre for Quantum and Molecular Structures, College of Sciences, Shanghai University, 99 Shangda Road, Shanghai 200444, China
| | - Alberto Baiardi
- Scuola Normale Superiore, Piazza Cavalieri 7, 56126 Pisa, Italy
| | - Kirk A Peterson
- Department of Chemistry, Washington State University, Pullman, Washington 99164-4630, USA
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12
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Krüger S, Grotemeyer J. Analysis of the 1A′ S1 ← 1A′ S0 and 2A′ D0 ← 1A′ S1 band systems in 1,2-dichloro-4-fluorobenzene by means of resonance-enhanced-multi-photon-ionization (REMPI) and mass-analyzed-threshold-ionization (MATI) spectroscopy. Phys Chem Chem Phys 2016; 18:7100-13. [DOI: 10.1039/c5cp07909h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
REMPI and MATI spectroscopy have been applied in order to investigate the vibrational structure of 1,2-dichloro-4-fluorobenzene (1,2,4-DCFB), in its first excited (S1) and cationic ground state (D0).
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Affiliation(s)
- Sascha Krüger
- Institut für Physikalische Chemie
- Christian-Albrechts-Universität Kiel
- 24118 Kiel
- Germany
| | - Jürgen Grotemeyer
- Institut für Physikalische Chemie
- Christian-Albrechts-Universität Kiel
- 24118 Kiel
- Germany
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Karmakar S, Mukhopadhyay DP, Chakraborty T. Electronic spectra and excited state dynamics of pentafluorophenol: Effects of low-lying πσ∗ states. J Chem Phys 2015; 142:184303. [DOI: 10.1063/1.4919950] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Affiliation(s)
- Shreetama Karmakar
- Physical Chemistry Department, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Deb Pratim Mukhopadhyay
- Physical Chemistry Department, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Tapas Chakraborty
- Physical Chemistry Department, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
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14
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Ridley T, Rogers DM, Lawley KP. A combined resonance enhanced multiphoton ionization and ab initio study of the first absorption band of 1,2,4,5-tetrafluorobenzene, pentafluorobenzene, and hexafluorobenzene. J Chem Phys 2014; 141:154310. [DOI: 10.1063/1.4898079] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Trevor Ridley
- EaStCHEM School of Chemistry, Joseph Black Building, The King's Buildings, Edinburgh EH9 3JJ, United Kingdom
| | - David M. Rogers
- EaStCHEM School of Chemistry, Joseph Black Building, The King's Buildings, Edinburgh EH9 3JJ, United Kingdom
| | - Kenneth P. Lawley
- EaStCHEM School of Chemistry, Joseph Black Building, The King's Buildings, Edinburgh EH9 3JJ, United Kingdom
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15
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Meng Q, Meyer HD. A multilayer MCTDH study on the full dimensional vibronic dynamics of naphthalene and anthracene cations. J Chem Phys 2013; 138:014313. [PMID: 23298047 DOI: 10.1063/1.4772779] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Employing the multilayer multiconfiguration time-dependent Hartree (ML-MCTDH) method in conjunction with the multistate multimode vibronic coupling Hamiltonian model, we perform a full dimensional quantum dynamical study on the naphthalene (48D) and anthracene (66D) radical cations in their six lowest-lying doublet electronic states. For easily comparing results of full and reduced dimensionalities, MCTDH simulations based on larger sizes of primitive basis functions and single-particle functions than the previous ones [S. Ghanta, V. S. Reddy, and S. Mahapatra, Phys. Chem. Chem. Phys. 13, 14531 (2011)], are also performed. Extensive ML-MCTDH test calculations are performed to find appropriate ML separations of the wave functions (so-called ML-trees), and the convergence of the dynamical calculations are carefully checked. The ML-MCTDH method was developed for efficiently simulating quantum dynamics of large systems, and in fact the full dimensional ML-MCTDH calculations save a considerable amount of CPU-time in comparison with corresponding reduced dimensional MCTDH simulations. On basis of the present full and reduced dimensional simulations, the photoelectron (PE) spectra of these two cations are simulated and compared with corresponding experimental spectra. The agreement between theoretical and experimental PE spectra is good. Both full and reduced dimensional simulations give all main bands in the PE spectra. The vibronic energy-level positions from both ML-MCTDH and MCTDH calculations agree with corresponding experimental results. These quantum dynamical studies also complement the observations on diffuse interstellar bands with the wavelength of ~7088, ~6707, ~6490, ~6120, and ~5959 Å measured by astronomers as well as laboratory experimentalists.
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Affiliation(s)
- Qingyong Meng
- Theoretische Chemie, Physikalisch-Chemische Institut, Ruprecht-Karls Universität Heidelberg, Im Neuenheimer Feld 229, D-69120 Heidelberg, Germany.
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Meng Q, Faraji S, Vendrell O, Meyer HD. Full dimensional quantum-mechanical simulations for the vibronic dynamics of difluorobenzene radical cation isomers using the multilayer multiconfiguration time-dependent Hartree method. J Chem Phys 2012; 137:134302. [DOI: 10.1063/1.4755372] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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17
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Mondal T, Reddy SR, Mahapatra S. Photophysics of fluorinated benzene. III. Hexafluorobenzene. J Chem Phys 2012; 137:054311. [DOI: 10.1063/1.4739502] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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18
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Sardar S, Puzari P, Adhikari S. Multi-state multi-mode nuclear dynamics on three isomers of C6H4F+2 using parallelized TDDVR approach. Phys Chem Chem Phys 2011; 13:15960-72. [DOI: 10.1039/c1cp20525k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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