1
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Nunes JPF, Williams M, Yang J, Wolf TJA, Rankine CD, Parrish R, Moore B, Wilkin K, Shen X, Lin MF, Hegazy K, Li R, Weathersby S, Martinez TJ, Wang XJ, Centurion M. Photo-induced structural dynamics of o-nitrophenol by ultrafast electron diffraction. Phys Chem Chem Phys 2024; 26:17991-17998. [PMID: 38764355 DOI: 10.1039/d3cp06253h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/21/2024]
Abstract
The photo-induced dynamics of o-nitrophenol, particularly its photolysis, has garnered significant scientific interest as a potential source of nitrous acid in the atmosphere. Although the photolysis products and preceding photo-induced electronic structure dynamics have been investigated extensively, the nuclear dynamics accompanying the non-radiative relaxation of o-nitrophenol on the ultrafast timescale, which include an intramolecular proton transfer step, have not been experimentally resolved. Herein, we present a direct observation of the ultrafast nuclear motions mediating photo-relaxation using ultrafast electron diffraction. This work spatiotemporally resolves the loss of planarity which enables access to a conical intersection between the first excited state and the ground state after the proton transfer step, on the femtosecond timescale and with sub-Angstrom resolution. Our observations, supported by ab initio multiple spawning simulations, provide new insights into the proton transfer mediated relaxation mechanism in o-nitrophenol.
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Affiliation(s)
- J P F Nunes
- Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, USA.
| | - M Williams
- SLAC National Accelerator Laboratory, Menlo Park, USA
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, USA
- Department of Chemistry, Stanford University, Stanford, USA
| | - J Yang
- SLAC National Accelerator Laboratory, Menlo Park, USA
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, USA
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China
| | - T J A Wolf
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, USA
| | - C D Rankine
- School of Natural and Environmental Sciences, Newcastle University, UK
| | - R Parrish
- SLAC National Accelerator Laboratory, Menlo Park, USA
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, USA
- Department of Chemistry, Stanford University, Stanford, USA
| | - B Moore
- Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, USA.
| | - K Wilkin
- Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, USA.
| | - X Shen
- SLAC National Accelerator Laboratory, Menlo Park, USA
| | - Ming-Fu Lin
- SLAC National Accelerator Laboratory, Menlo Park, USA
| | - K Hegazy
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, USA
- Department of Physics, Stanford University, Stanford, USA
| | - R Li
- SLAC National Accelerator Laboratory, Menlo Park, USA
| | - S Weathersby
- SLAC National Accelerator Laboratory, Menlo Park, USA
| | - T J Martinez
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, USA
- Department of Chemistry, Stanford University, Stanford, USA
| | - X J Wang
- SLAC National Accelerator Laboratory, Menlo Park, USA
- Physics Department, Universität Duisburg Essen, 47052 Duisburg, Research Center Chemical Sciences and Sustainability, Research Alliance Ruhr, 44780 Bochum, Germany
- Physics Department, Technische Universität Dortmund, 44221 Dortmund, Research Center Chemical Sciences and Sustainability, Research Alliance Ruhr, 44780 Bochum, Germany
| | - M Centurion
- Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, USA.
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2
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Zhang ZT, Vaníček JJL. Finite-temperature vibronic spectra from the split-operator coherence thermofield dynamics. J Chem Phys 2024; 160:084103. [PMID: 38385512 DOI: 10.1063/5.0187823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 12/22/2023] [Indexed: 02/23/2024] Open
Abstract
We present a numerically exact approach for evaluating vibrationally resolved electronic spectra at finite temperatures using the coherence thermofield dynamics. In this method, which avoids implementing an algorithm for solving the von Neumann equation for coherence, the thermal vibrational ensemble is first mapped to a pure-state wavepacket in an augmented space, and this wavepacket is then propagated by solving the standard, zero-temperature Schrödinger equation with the split-operator Fourier method. We show that the finite-temperature spectra obtained with the coherence thermofield dynamics in a Morse potential agree exactly with those computed by Boltzmann-averaging the spectra of individual vibrational levels. Because the split-operator thermofield dynamics on a full tensor-product grid is restricted to low-dimensional systems, we briefly discuss how the accessible dimensionality can be increased by various techniques developed for the zero-temperature split-operator Fourier method.
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Affiliation(s)
- Zhan Tong Zhang
- Laboratory of Theoretical Physical Chemistry, Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Jiří J L Vaníček
- Laboratory of Theoretical Physical Chemistry, Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
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3
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Abstract
Multidimensional optical spectra are measured from the response of a material system to a sequence of laser pulses and have the capacity to elucidate specific molecular interactions and dynamics whose influences are absent or obscured in a conventional linear absorption spectrum. Interpretation of complex spectra is supported by theoretical modeling of the spectroscopic observable, requiring implementation of quantum dynamics for coupled electrons and nuclei. Performing numerically correct quantum dynamics in this context may pose computational challenges, particularly in the condensed phase. Semiclassical methods based on calculating classical trajectories offer a practical alternative. Here I review the recent application of some semiclassical, trajectory-based methods to nonlinear molecular vibrational and electronic spectra. Expected final online publication date for the Annual Review of Physical Chemistry, Volume 73 is April 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.
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Affiliation(s)
- Roger F. Loring
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York, USA
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4
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Wang C, Ulusoy IS, Aebersold LE, Wilson AK. Multi-configuration electron-nuclear dynamics: An open-shell approach. J Chem Phys 2021; 155:154103. [PMID: 34686063 DOI: 10.1063/5.0063478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The multi-configuration electron-nuclear dynamics for open shell systems with a spin-unrestricted formalism is described. The mean fields are evaluated using second-order reduced density matrices for electronic and nuclear degrees of freedom. Applications to light-element diatomics including equilibrium geometries, electronic energies, dipole moments, and absorption spectra are presented. The von Neumann entropies for different spin states of a LiH molecule are compared.
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Affiliation(s)
- Cong Wang
- Department of Chemistry, Michigan State University, 578 S Shaw Lane, East Lansing, Michigan 48824-1322, USA
| | - Inga S Ulusoy
- Department of Chemistry, Michigan State University, 578 S Shaw Lane, East Lansing, Michigan 48824-1322, USA
| | - Lucas E Aebersold
- Department of Chemistry, Michigan State University, 578 S Shaw Lane, East Lansing, Michigan 48824-1322, USA
| | - Angela K Wilson
- Department of Chemistry, Michigan State University, 578 S Shaw Lane, East Lansing, Michigan 48824-1322, USA
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5
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Begušić T, Vaníček J. On-the-fly ab initio semiclassical evaluation of vibronic spectra at finite temperature. J Chem Phys 2020; 153:024105. [PMID: 32668922 DOI: 10.1063/5.0013677] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
To compute and analyze vibrationally resolved electronic spectra at zero temperature, we have recently implemented the on-the-fly ab initio extended thawed Gaussian approximation [A. Patoz et al., J. Phys. Chem. Lett. 9, 2367 (2018)], which accounts for anharmonicity, mode-mode coupling, and Herzberg-Teller effects. Here, we generalize this method in order to evaluate spectra at non-zero temperature. In line with thermo-field dynamics, we transform the von Neumann evolution of the coherence component of the density matrix to the Schrödinger evolution of a wavefunction in an augmented space with twice as many degrees of freedom. Due to the efficiency of the extended thawed Gaussian approximation, this increase in the number of coordinates results in nearly no additional computational cost. More specifically, compared to the original, zero-temperature approach, the finite-temperature method requires no additional ab initio electronic structure calculations. At the same time, the new approach allows for a clear distinction among finite-temperature, anharmonicity, and Herzberg-Teller effects on spectra. We show, on a model Morse system, the advantages of the finite-temperature thawed Gaussian approximation over the commonly used global harmonic methods and apply it to evaluate the symmetry-forbidden absorption spectrum of benzene, where all of the aforementioned effects contribute.
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Affiliation(s)
- Tomislav Begušić
- Laboratory of Theoretical Physical Chemistry, Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Jiří Vaníček
- Laboratory of Theoretical Physical Chemistry, Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
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6
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Gómez S, Ibele LM, González L. The 3s Rydberg state as a doorway state in the ultrafast dynamics of 1,1-difluoroethylene. Phys Chem Chem Phys 2019; 21:4871-4878. [DOI: 10.1039/c8cp07766e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The deactivation dynamics of 1,1-difluoroethylene after light excitation is studied within the surface hopping formalism in the presence of 3s and 3p Rydberg states using multi-state second order perturbation theory (MS-CASPT2).
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Affiliation(s)
- Sandra Gómez
- Institute for Theoretical Chemistry
- Faculty of Chemistry
- University of Vienna
- 1090 Vienna
- Austria
| | - Lea M. Ibele
- Institute for Theoretical Chemistry
- Faculty of Chemistry
- University of Vienna
- 1090 Vienna
- Austria
| | - Leticia González
- Institute for Theoretical Chemistry
- Faculty of Chemistry
- University of Vienna
- 1090 Vienna
- Austria
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7
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Ma T, Bonfanti M, Eisenbrandt P, Martinazzo R, Burghardt I. Multi-configurational Ehrenfest simulations of ultrafast nonadiabatic dynamics in a charge-transfer complex. J Chem Phys 2018; 149:244107. [DOI: 10.1063/1.5062608] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Tianji Ma
- Institute of Physical and Theoretical Chemistry, Goethe University Frankfurt, Max-von-Laue-Str. 7, D-60438 Frankfurt/Main, Germany
| | - Matteo Bonfanti
- Institute of Physical and Theoretical Chemistry, Goethe University Frankfurt, Max-von-Laue-Str. 7, D-60438 Frankfurt/Main, Germany
| | - Pierre Eisenbrandt
- Institute of Physical and Theoretical Chemistry, Goethe University Frankfurt, Max-von-Laue-Str. 7, D-60438 Frankfurt/Main, Germany
| | - Rocco Martinazzo
- Department of Chemistry, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
| | - Irene Burghardt
- Institute of Physical and Theoretical Chemistry, Goethe University Frankfurt, Max-von-Laue-Str. 7, D-60438 Frankfurt/Main, Germany
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8
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Baiardi A, Bloino J, Barone V. Time-Dependent Formulation of Resonance Raman Optical Activity Spectroscopy. J Chem Theory Comput 2018; 14:6370-6390. [PMID: 30281300 DOI: 10.1021/acs.jctc.8b00488] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
In this work, we extend the theoretical framework recently developed for the simulation of resonance Raman (RR) spectra of medium-to-large sized systems to its chiral counterpart, namely, resonance Raman optical activity (RROA). The theory is based on a time-dependent (TD) formulation, with the transition tensors obtained as half-Fourier transforms of the appropriate cross-correlation functions. The implementation has been kept as general as possible, supporting adiabatic and vertical models for the PES representation, both in Cartesian and internal coordinates, with the possible inclusion of Herzberg-Teller (HT) effects. Thanks to the integration of this TD-RROA procedure within a general-purpose quantum-chemistry program, both solvation and leading anharmonicity effects can be included in an effective way. The implementation is validated on one of the smallest chiral molecule (methyloxirane). Practical applications are illustrated with three medium-size organic molecules (naproxen-OCD3, quinidine and 2-Br-hexahelicene), whose simulated spectra are compared to the corresponding experimental data.
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Affiliation(s)
- Alberto Baiardi
- Scuola Normale Superiore , piazza dei Cavalieri 7 , I-56126 Pisa , Italy
| | - Julien Bloino
- Scuola Normale Superiore , piazza dei Cavalieri 7 , I-56126 Pisa , Italy
| | - Vincenzo Barone
- Scuola Normale Superiore , piazza dei Cavalieri 7 , I-56126 Pisa , Italy
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9
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Bonfanti M, Petersen J, Eisenbrandt P, Burghardt I, Pollak E. Computation of the S 1 ← S 0 Vibronic Absorption Spectrum of Formaldehyde by Variational Gaussian Wavepacket and Semiclassical IVR Methods. J Chem Theory Comput 2018; 14:5310-5323. [PMID: 30141930 DOI: 10.1021/acs.jctc.8b00355] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The vibronic absorption spectrum of the electric dipole forbidden and vibronically allowed S1(1 A2) ← S0(1 A1) transition of formaldehyde is calculated by Gaussian wavepacket and semiclassical methods, along with numerically exact reference calculations, using the potential energy surface of Fu, Shepler, and Bowman ( J. Am. Chem. Soc. 2011, 133, 7957). Specifically, the variational multiconfigurational Gaussian (vMCG) approach and the Herman-Kluk semiclassical initial value representation (HK-SCIVR) are compared to assess the accuracy and convergence of these methods, benchmarked against numerically exact time-dependent wavepacket propagation (TDWP) on the reference potential energy surface. The vMCG calculation is shown to converge quite well with about 100 variationally evolving Gaussian functions and using a local cubic expansion instead of the conventional local harmonic approximation. By contrast, the HK-SCIVR approach with ∼105 trajectories reproduces the vibrationally structured spectral envelope correctly but yields a strongly broadened spectrum. The comparison of the computed absorption spectrum with experiment shows that the relevant vibronic progressions are reasonably reproduced by all computations, but deviations of the order of 10-100 cm-1 occur, underscoring that both electronic structure calculations and dynamical approaches remain challenging in the calculation of typical small-molecule excited-state spectra by trajectory-based methods.
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Affiliation(s)
- Matteo Bonfanti
- Institute of Physical and Theoretical Chemistry , Goethe University Frankfurt , Max-von-Laue-Str. 7 , D-60438 Frankfurt/Main , Germany
| | - Jakob Petersen
- Chemical and Biological Physics Department , Weizmann Institute of Science , 76000 Rehovot , Israel
| | - Pierre Eisenbrandt
- Institute of Physical and Theoretical Chemistry , Goethe University Frankfurt , Max-von-Laue-Str. 7 , D-60438 Frankfurt/Main , Germany
| | - Irene Burghardt
- Institute of Physical and Theoretical Chemistry , Goethe University Frankfurt , Max-von-Laue-Str. 7 , D-60438 Frankfurt/Main , Germany
| | - Eli Pollak
- Chemical and Biological Physics Department , Weizmann Institute of Science , 76000 Rehovot , Israel
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10
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Crespo-Otero R, Barbatti M. Recent Advances and Perspectives on Nonadiabatic Mixed Quantum–Classical Dynamics. Chem Rev 2018; 118:7026-7068. [DOI: 10.1021/acs.chemrev.7b00577] [Citation(s) in RCA: 301] [Impact Index Per Article: 50.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rachel Crespo-Otero
- School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom
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11
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Affiliation(s)
- Basile F. E. Curchod
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, United Kingdom
| | - Todd J. Martínez
- Department of Chemistry and PULSE Institute, Stanford University, Stanford, California 94305, United States
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
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12
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Costa GJ, Borin AC, Custodio R, Vidal LN. Fully Anharmonic Vibrational Resonance Raman Spectrum of Diatomic Systems. J Chem Theory Comput 2018; 14:843-855. [DOI: 10.1021/acs.jctc.7b01034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gustavo J. Costa
- Departamento Acadêmico de Química e Biologia, Universidade Tecnológica Federal do Paraná, Av. Dep. Heitor de Alencar Furtado, 5000, Curitiba/PR 81280-340, Brazil
| | - Antonio C. Borin
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, NAP-Photo Tech the USP Consortium of Photochemical Technology, Av. Prof. Lineu Prestes, 748, São Paulo/SP 05508-000, Brazil
| | - Rogério Custodio
- Instituto de Química, Universidade Estadual de Campinas, R. Josué de Castro, 126, Campinas/SP 13083-970, Brazil
| | - Luciano N. Vidal
- Departamento Acadêmico de Química e Biologia, Universidade Tecnológica Federal do Paraná, Av. Dep. Heitor de Alencar Furtado, 5000, Curitiba/PR 81280-340, Brazil
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13
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Petit AS, Subotnik JE. Appraisal of Surface Hopping as a Tool for Modeling Condensed Phase Linear Absorption Spectra. J Chem Theory Comput 2015; 11:4328-41. [DOI: 10.1021/acs.jctc.5b00510] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andrew S. Petit
- Department of Chemistry, University of Pennsylvania, 231 South
34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Joseph E. Subotnik
- Department of Chemistry, University of Pennsylvania, 231 South
34th Street, Philadelphia, Pennsylvania 19104, United States
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14
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Petit AS, Subotnik JE. Calculating time-resolved differential absorbance spectra for ultrafast pump-probe experiments with surface hopping trajectories. J Chem Phys 2014; 141:154108. [DOI: 10.1063/1.4897258] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Affiliation(s)
- Andrew S. Petit
- Department of Chemistry, University of Pennsylvania, 231 S. 34th Street, Philadelphia, Pennsylvania 19104, USA
| | - Joseph E. Subotnik
- Department of Chemistry, University of Pennsylvania, 231 S. 34th Street, Philadelphia, Pennsylvania 19104, USA
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15
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Makhov DV, Glover WJ, Martinez TJ, Shalashilin DV. Ab initio multiple cloning algorithm for quantum nonadiabatic molecular dynamics. J Chem Phys 2014; 141:054110. [DOI: 10.1063/1.4891530] [Citation(s) in RCA: 139] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Dmitry V. Makhov
- Department of Chemistry, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - William J. Glover
- Department of Chemistry and The PULSE Institute, Stanford University, Stanford, California 94305, USA and SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Todd J. Martinez
- Department of Chemistry and The PULSE Institute, Stanford University, Stanford, California 94305, USA and SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
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16
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An overview of nonadiabatic dynamics simulations methods, with focus on the direct approach versus the fitting of potential energy surfaces. Theor Chem Acc 2014. [DOI: 10.1007/s00214-014-1526-1] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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17
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Petit AS, Subotnik JE. How to calculate linear absorption spectra with lifetime broadening using fewest switches surface hopping trajectories: A simple generalization of ground-state Kubo theory. J Chem Phys 2014; 141:014107. [DOI: 10.1063/1.4884945] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Andrew S. Petit
- Department of Chemistry, University of Pennsylvania, 231 S. 34th Street, Philadelphia, Pennsylvania 19104, USA
| | - Joseph E. Subotnik
- Department of Chemistry, University of Pennsylvania, 231 S. 34th Street, Philadelphia, Pennsylvania 19104, USA
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18
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Parkhill JA, Markovich T, Tempel DG, Aspuru-Guzik A. A correlated-polaron electronic propagator: Open electronic dynamics beyond the Born-Oppenheimer approximation. J Chem Phys 2012; 137:22A547. [DOI: 10.1063/1.4762441] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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19
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Isborn CM, Götz AW, Clark MA, Walker RC, Martínez TJ. Electronic Absorption Spectra from MM and ab initio QM/MM Molecular Dynamics: Environmental Effects on the Absorption Spectrum of Photoactive Yellow Protein. J Chem Theory Comput 2012; 8:5092-5106. [PMID: 23476156 PMCID: PMC3590007 DOI: 10.1021/ct3006826] [Citation(s) in RCA: 134] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We describe a new interface of the GPU parallelized TeraChem electronic structure package and the Amber molecular dynamics package for quantum mechanical (QM) and mixed QM and molecular mechanical (MM) molecular dynamics simulations. This QM/MM interface is used for computation of the absorption spectra of the photoactive yellow protein (PYP) chromophore in vacuum, aqueous solution, and protein environments. The computed excitation energies of PYP require a very large QM region (hundreds of atoms) covalently bonded to the chromophore in order to achieve agreement with calculations that treat the entire protein quantum mechanically. We also show that 40 or more surrounding water molecules must be included in the QM region in order to obtain converged excitation energies of the solvated PYP chromophore. These results indicate that large QM regions (with hundreds of atoms) are a necessity in QM/MM calculations.
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Affiliation(s)
- Christine M. Isborn
- PULSE Institute and Department of Chemistry, Stanford University, Stanford, CA 94305
- SLAC National Accelerator Laboratory, Menlo Park, CA 94025
| | - Andreas W. Götz
- San Diego Supercomputer Center, University of California San Diego, La Jolla, CA 92093
| | - Matthew A. Clark
- San Diego Supercomputer Center, University of California San Diego, La Jolla, CA 92093
| | - Ross C. Walker
- San Diego Supercomputer Center, University of California San Diego, La Jolla, CA 92093
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA 92093
| | - Todd J. Martínez
- PULSE Institute and Department of Chemistry, Stanford University, Stanford, CA 94305
- SLAC National Accelerator Laboratory, Menlo Park, CA 94025
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20
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Kinzel D, González-Vázquez J, González L. H-abstraction is more efficient than cis–trans isomerization in (4-methylcyclohexylidene) fluoromethane. An ab initio molecular dynamics study. Phys Chem Chem Phys 2012; 14:6241-9. [DOI: 10.1039/c1cp22646k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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21
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Min SK, Cho Y, Kim KS. Efficient electron dynamics with the planewave-based real-time time-dependent density functional theory: Absorption spectra, vibronic electronic spectra, and coupled electron-nucleus dynamics. J Chem Phys 2011; 135:244112. [DOI: 10.1063/1.3671952] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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22
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Alnama K, Boyé-Péronne S, Roche AL, Gauyacq D. Excited states of C2H4 studied by (3 + 1) and (3 + 2) REMPI spectroscopy: disentangling the lowest Rydberg series from the strong π–π* V ← N transition. Mol Phys 2010. [DOI: 10.1080/00268970701496524] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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23
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Alfalah S, Kinzel D, González-Vázquez J, González L. Non-adiabatic photoisomerization versus photodissociation dynamics of the chiral fluoroethylene derivative (4-methylcyclohexylidene) fluoromethane. Chem Phys 2010. [DOI: 10.1016/j.chemphys.2010.03.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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24
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Tatchen J, Pollak E. Semiclassical on-the-fly computation of the S0→S1 absorption spectrum of formaldehyde. J Chem Phys 2009; 130:041103. [DOI: 10.1063/1.3074100] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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25
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Myers Kelley A. Resonance Raman and Resonance Hyper-Raman Intensities: Structure and Dynamics of Molecular Excited States in Solution. J Phys Chem A 2008; 112:11975-91. [DOI: 10.1021/jp805530y] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Anne Myers Kelley
- School of Natural Sciences, University of California, Merced, P.O. Box 2039, Merced, California 95344
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26
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Worth G, Robb M, Lasorne B. Solving the time-dependent Schrödinger equation for nuclear motion in one step: direct dynamics of non-adiabatic systems. Mol Phys 2008. [DOI: 10.1080/00268970802172503] [Citation(s) in RCA: 137] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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27
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Kosma K, Trushin SA, Fuss W, Schmid WE. Ultrafast Dynamics and Coherent Oscillations in Ethylene and Ethylene-d4 Excited at 162 nm. J Phys Chem A 2008; 112:7514-29. [DOI: 10.1021/jp803548c] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- K. Kosma
- Max-Planck-Institut für Quantenoptik, D-85741 Garching, Germany
| | - S. A. Trushin
- Max-Planck-Institut für Quantenoptik, D-85741 Garching, Germany
| | - W. Fuss
- Max-Planck-Institut für Quantenoptik, D-85741 Garching, Germany
| | - W. E. Schmid
- Max-Planck-Institut für Quantenoptik, D-85741 Garching, Germany
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28
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González-Vázquez J, González L. A CASSCF and CASPT2 study of the photochemistry of 1,1- and 1,2-difluoroethylenes. Chem Phys 2008. [DOI: 10.1016/j.chemphys.2008.01.043] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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29
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Abstract
The standard model for photoinduced cis-trans isomerization about carbon double bonds is framed in terms of two electronic states and a one-dimensional reaction coordinate. We review recent work that suggests that a minimal picture of the reaction mechanism requires the consideration of at least two molecular coordinates and three electronic states. In this chapter, we emphasize the role of conical intersections and charge transfer in the photoisomerization mechanism.
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Affiliation(s)
- Benjamin G Levine
- Department of Chemistry, Beckman Institute, Center for Biophysics and Computational Biology, and Frederick Seitz Materials Research Laboratory, University of Illinois, Urbana, IL 61801, USA.
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31
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Viel A, Coutinho-Neto MD, Manthe U. The ground state tunneling splitting and the zero point energy of malonaldehyde: A quantum Monte Carlo determination. J Chem Phys 2007; 126:024308. [PMID: 17228955 DOI: 10.1063/1.2406074] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Quantum dynamics calculations of the ground state tunneling splitting and of the zero point energy of malonaldehyde on the full dimensional potential energy surface proposed by Yagi et al. [J. Chem. Phys. 1154, 10647 (2001)] are reported. The exact diffusion Monte Carlo and the projection operator imaginary time spectral evolution methods are used to compute accurate benchmark results for this 21-dimensional ab initio potential energy surface. A tunneling splitting of 25.7+/-0.3 cm-1 is obtained, and the vibrational ground state energy is found to be 15 122+/-4 cm-1. Isotopic substitution of the tunneling hydrogen modifies the tunneling splitting down to 3.21+/-0.09 cm-1 and the vibrational ground state energy to 14 385+/-2 cm-1. The computed tunneling splittings are slightly higher than the experimental values as expected from the potential energy surface which slightly underestimates the barrier height, and they are slightly lower than the results from the instanton theory obtained using the same potential energy surface.
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Affiliation(s)
- Alexandra Viel
- Theoretische Chemie, TU München, Lichtenbergstrasse 4, D-85747 Garching, Germany.
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32
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Borrelli R, Peluso A. The vibrational progressions of the N→V electronic transition of ethylene: A test case for the computation of Franck-Condon factors of highly flexible photoexcited molecules. J Chem Phys 2006; 125:194308. [PMID: 17129104 DOI: 10.1063/1.2388269] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The vibrational progressions of the N-->V electronic transition of ethylene--a test case for the computation of Franck-Condon factors between electronic states exhibiting very different equilibrium geometries--have been calculated by using both the Cartesian and the curvilinear internal coordinate representations of the normal modes of vibration. The comparison of the theoretical spectra with the experimental one shows that the Cartesian representation yields vibrational progressions which are not observed in the experimental spectrum, whereas the curvilinear one gives a very satisfying agreement, even in harmonic approximation.
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Affiliation(s)
- Raffaele Borrelli
- Dipartimento di Chimica, Università di Salerno, I-84084 Fisciano, Salerno, Italy
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33
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Bespechansky E, Portnov A, Zwielly A, Rosenwaks S, Bar I. Vibrationally mediated photodissociation of ethene isotopic variants preexcited to the fourth C–H stretch overtone. J Chem Phys 2006; 125:133301. [PMID: 17029454 DOI: 10.1063/1.2217743] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
H and D photofragments produced via vibrationally mediated photodissociation of jet-cooled normal ethene (C2H4), 1,2-trans-d2-ethene (HDCCDH), and 1,1-d2-ethene (CH2CD2), initially excited to the fourth C-H stretch overtone region, were studied for the first time. H and D vibrational action spectra and Doppler profiles were measured. The action spectra include partially resolved features due to rotational cooling, while the monitored room temperature photoacoustic spectra exhibit only a very broad feature in each species. Simulation of the spectral contours allowed determination of the band types and origins, limited precision rotational constants, and linewidths, providing time scales for energy redistribution. The H and D Doppler profiles correspond to low average translational energies and show slight preferential C-H over C-D bond cleavage in the deuterated variants. The propensities toward H photofragments emerge even though the energy flow out of the initially prepared C-H stretch is on a picosecond time scale and the photodissociation occurs following internal conversion, indicating a more effective release of the light H atoms.
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Affiliation(s)
- Evgeny Bespechansky
- Department of Physics, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
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34
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Ichino T, Gianola AJ, Lineberger WC, Stanton JF. Nonadiabatic effects in the photoelectron spectrum of the pyrazolide-d3 anion: Three-state interactions in the pyrazolyl-d3 radical. J Chem Phys 2006; 125:084312. [PMID: 16965017 DOI: 10.1063/1.2338043] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The 351.1 nm photoelectron spectrum of the 1-pyrazolide-d(3) anion has been measured. The photoelectron angular distributions indicate the presence of nearly degenerate electronic states of the 1-pyrazolyl-d(3) radical. Equation-of-motion ionization potential coupled-cluster singles and doubles (EOMIP-CCSD) calculations have been performed to study the low-lying electronic states. The calculations strongly suggest that three electronic states, energetically close to each other, are accessed in the photodetachment process. Strong interactions of the pseudo-Jahn-Teller type in each pair of the three states are evident in the calculations for the radical at the anion geometry. Model diabatic potentials of the three states have been constructed around the anion geometry in terms of the anion reduced normal coordinates up to the second order. An analytic method to parametrize the quadratic vibronic coupling (QVC) model potentials has been introduced. Parameters of the QVC model potentials have been determined from the EOMIP-CCSD and CCSD(T) calculations. Simulations of the 1-pyrazolide-d(3) spectrum have been performed with the model Hamiltonian, treating all vibronic interactions amongst the three states simultaneously. The simulation reproduces the fine structure of the observed spectrum very well, revealing complicated nonadiabatic effects in the low-lying states of the radical. The ground state of the 1-pyrazolyl-d(3) radical is (2)A(2) and the electron affinity is 2.935+/-0.006 eV. The first excited state is (2)B(1) with a term energy of 32+/-1 meV. While the high-symmetry (C(2v)) stationary points of the X (2)A(2) and A (2)B(1) states are minima, that of the state is a saddle point as a result of the pseudo-Jahn-Teller interactions with the other two states. The topology of the adiabatic potential energy surfaces is discussed.
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Affiliation(s)
- Takatoshi Ichino
- JILA, University of Colorado and National Institute of Standards and Technology, Boulder, CO 80309-0440, USA
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35
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Barbatti M, Paier J, Lischka H. Photochemistry of ethylene: a multireference configuration interaction investigation of the excited-state energy surfaces. J Chem Phys 2006; 121:11614-24. [PMID: 15634126 DOI: 10.1063/1.1807378] [Citation(s) in RCA: 155] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Multireference configuration interaction with singles and doubles (MR-CISD) calculations have been performed for the optimization of conical intersections and stationary points on the ethylene excited-state energy surfaces using recently developed methods for the computation of analytic gradients and nonadiabatic coupling terms. Basis set dependence and the effect of various choices of reference spaces for the MR-CISD calculations have been investigated. The crossing seam between the S0 and S1 states has been explored in detail. This seam connects all conical intersections presently known for ethylene. Major emphasis has been laid on the hydrogen-migration path. Starting in the V state of twisted-orthogonal ethylene, a barrierless path to ethylidene was found. The feasibility of ethylidene formation will be important for the explanation of the relative yield of cis and trans H2 elimination.
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Affiliation(s)
- M Barbatti
- Institute for Theoretical Chemistry and Structural Biology, University of Vienna, A-1090 Vienna, Austria.
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36
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37
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Barbatti M, Ruckenbauer M, Lischka H. The photodynamics of ethylene: A surface-hopping study on structural aspects. J Chem Phys 2005; 122:174307. [PMID: 15910032 DOI: 10.1063/1.1888573] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Simulations of the photodynamics of ethylene were carried out by employing the semiempirical direct trajectory with surface hopping method in order to assess quantitatively the importance of different regions of the S(2)S(1) and S(1)S(0) crossing seams. The results show that during the first 50 fs after a vertical photoexcitation to the pipi(*) state, the nonadiabatic coupling between the S(1) and the S(2) states produces a recurrence pattern of oscillation of the populations in these states. Within the first 100 fs, the S(1) state population spans a limited region of the configuration space between the initial geometries and the twisted-pyramidalized minimum on the crossing seam (MXS). Depending on the way of counting, about 50% of the S(1)-->S(0) transitions occur in the pyramidalized region of the crossing seam, but not necessarily close to the MXS. The remaining 50% occurs in the H-migration and ethylidene regions. Our analysis shows that the ethylidene region becomes more important in later stages of the dynamics when the flux of trajectories that was not effectively converted to the ground state in the pyramidalized region starts to reach this part of the configuration space. The excited-state nonadiabatic dynamics could be employed to generate suitable initial phase space distributions for the hot-ethylene ground-state kinetic studies.
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Affiliation(s)
- M Barbatti
- Institute for Theoretical Chemistry, University of Vienna, Austria.
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38
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Computation of Reaction Mechanisms and Dynamics in Photobiology. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/s1380-7323(05)80024-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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39
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Choi H, Baeck KK, Martinez TJ. Ab initio equation-of-motion coupled-cluster molecular dynamics with ‘on-the-fly’ diabatization: the doublet-like feature in the photoabsorption spectrum of ethylene. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.09.084] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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40
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Hazra A, Chang HH, Nooijen M. First principles simulation of the UV absorption spectrum of ethylene using the vertical Franck-Condon approach. J Chem Phys 2004; 121:2125-36. [PMID: 15260766 DOI: 10.1063/1.1768173] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A new method which we refer to as vertical Franck-Condon is proposed to calculate electronic absorption spectra of polyatomic molecules. In accord with the short-time picture of spectroscopy, the excited-state potential energy surface is expanded at the ground-state equilibrium geometry and the focus of the approach is more on the overall shape of the spectrum and the positions of the band maxima, rather than the precise position of the 0-0 lines. The Born-Oppenheimer approximation and the separability of the excited-state potential energy surface along the excited-state normal mode coordinates are assumed. However, the potential surface is not necessarily approximated as harmonic oscillator potentials along the individual normal modes. Instead, depending upon the nature of the potential surface along a particular normal mode, it is treated either in the harmonic approximation or the full one-dimensional potential is considered along this mode. The vertical Franck-Condon approach is applicable therefore even in cases where the excited state potential energy surface is highly anharmonic and the conventional harmonic Franck-Condon approach is inadequate. As an application of the method, the ultraviolet spectrum of ethylene between 6.2 eV (50,000 cm(-1)) and 8.7 eV (70,000 cm(-1)) is simulated, using the Similarity Transformed Equation of Motion Coupled-Cluster method to describe the required features of the potential energy surfaces. The spectrum is shown to be a result of sharp doublet structures stemming from the pi --> 3s (Rydberg) state superimposed on top of a broad band resulting from the pi --> pi* (valence) state. For the Rydberg state, the symmetric C=C stretch and the torsion mode contribute to the spectrum, while the broad valence band results from excitation into the C=C stretch, CH2 scissors, and the torsion mode. For both states, the potential along the torsion mode is highly anharmonic and the full treatment of the potential along this mode in the vertical Franck-Condon method is required.
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Affiliation(s)
- Anirban Hazra
- Department of Chemistry, Princeton University, New Jersey 08544, USA
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41
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Viel A, Krawczyk RP, Manthe U, Domcke W. Photoinduced dynamics of ethene in the N, V, and Z valence states: A six-dimensional nonadiabatic quantum dynamics investigation. J Chem Phys 2004; 120:11000-10. [PMID: 15268130 DOI: 10.1063/1.1740696] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The photoinduced dynamics of ethene following pi-->pi(*) excitation is investigated by quantum wave-packet dynamics on three coupled six-dimensional diabatic potential-energy surfaces representing the N, V, and Z valence states, which have been developed previously. The C-C stretching and torsion, as well as the pyramidalization and scissoring of both CH(2) groups are included in this description. The wave-packet calculations have been performed using the multiconfigurational time-dependent Hartree method for a time period up to 100 fs. While a small amount of population transfer to the electronic ground state is found within this period, the overall population decay time of the V state is found to exceed the 100 fs range significantly. The autocorrelation function of the wave packet and the stationary absorption spectrum of the V state also have been calculated. It is found that both the torsional mode as well as the C-C stretching mode contribute to the very extended vibrational structure of the absorption spectrum, and that both modes are strongly coupled. At least on the present ab initio surface of limited dimensionality, the speed of pyramidalization of 90 degrees twisted ethene appears as the bottleneck for the ultrafast radiationless decay of the V state.
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Affiliation(s)
- Alexandra Viel
- Department of Chemistry, Technical University of Munich, D-85747 Garching, Germany
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42
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Snyder PA, Atanasova S, Hansen RWC. Ethylene. Experimental Evidence for New Assignments of Electronic Transitions in the π → π* Energy Region. Absorption and Magnetic Circular Dichroism Measurements with Synchrotron Radiation. J Phys Chem A 2004. [DOI: 10.1021/jp030837r] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Patricia Ann Snyder
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, Florida 33431
| | - Sylvia Atanasova
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, Florida 33431
| | - Roger W. C. Hansen
- Synchrotron Radiation Center, University of WisconsinMadison, 3731 Schneider Drive, Stoughton, Wisconsin 53589
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43
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Krawczyk RP, Viel A, Manthe U, Domcke W. Photoinduced dynamics of the valence states of ethene: A six-dimensional potential-energy surface of three electronic states with several conical intersections. J Chem Phys 2003. [DOI: 10.1063/1.1580092] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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44
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Baeck KK, Martinez TJ. Ab initio molecular dynamics with equation-of-motion coupled-cluster theory: electronic absorption spectrum of ethylene. Chem Phys Lett 2003. [DOI: 10.1016/s0009-2614(03)00847-9] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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45
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Kim JE, Tauber MJ, Mathies RA. Analysis of the mode-specific excited-state energy distribution and wavelength-dependent photoreaction quantum yield in rhodopsin. Biophys J 2003; 84:2492-501. [PMID: 12668457 PMCID: PMC1302815 DOI: 10.1016/s0006-3495(03)75054-1] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The photoreaction quantum yield of rhodopsin is wavelength dependent: phi(lambda) is reduced by up to 5% at wavelengths to the red of 500 nm but is invariant (phi = 0.65 +/- 0.01) between 450 and 500 nm (Kim et al., 2001). To understand this nonstatistical internal conversion process, these results are compared with predictions of a Landau-Zener model for dynamic curve crossing. The initial distribution of excess photon energy in the 28 Franck-Condon active vibrational modes of rhodopsin is defined by a fully thermalized sum-over-states vibronic calculation. This calculation reveals that absorption by high-frequency unreactive modes (e.g., C[double bond]C stretches) increases as the excitation wavelength is shifted from 570 to 450 nm whereas relatively less energy is deposited into reactive low-frequency modes. This result qualitatively explains the experimentally observed wavelength dependence of phi(lambda) for rhodopsin and reveals the importance of delocalized, torsional modes in the reactive pathway.
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Affiliation(s)
- Judy E Kim
- Department of Chemistry, University of California at Berkeley, Berkeley, California 94720 USA
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46
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Bertsch GF, Giansiracusa J, Yabana K. Application of time-dependent density-functional theory to electron-ion coupling in ethylene. Isr J Chem 2002. [DOI: 10.1560/jjhk-acm8-2e6m-dk9c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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47
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Quenneville J, Ben-Nun M, Martı́nez TJ. Photochemistry from first principles — advances and future prospects. J Photochem Photobiol A Chem 2001. [DOI: 10.1016/s1010-6030(01)00452-x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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48
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Shiu YJ, Hayashi M, Mebel AM, Chen YT, Lin SH. Computational formulas for symmetry-forbidden vibronic spectra and their application to n–π* transition in neat acetone. J Chem Phys 2001. [DOI: 10.1063/1.1386918] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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49
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Hack MD, Wensmann AM, Truhlar DG, Ben-Nun M, Martı́nez TJ. Comparison of full multiple spawning, trajectory surface hopping, and converged quantum mechanics for electronically nonadiabatic dynamics. J Chem Phys 2001. [DOI: 10.1063/1.1377030] [Citation(s) in RCA: 126] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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50
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Hahn S, Stock G. Theoretical Description of Secondary Emission Reflecting Ultrafast Nonadiabatic Isomerization. J Phys Chem A 2001. [DOI: 10.1021/jp003788g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Susanne Hahn
- Theoretical Quantum Dynamics, Faculty of Physics, University Freiburg, D-79104 Freiburg, Germany
| | - Gerhard Stock
- Theoretical Quantum Dynamics, Faculty of Physics, University Freiburg, D-79104 Freiburg, Germany
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