DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Coupled Electronic and Nuclear Motions during Azobenzene Photoisomerization Monitored by Ultrafast Electron Diffraction

Journal Article · · Journal of Chemical Theory and Computation

Ultrafast electron diffraction is a powerful technique that can resolve molecular structures with femtosecond and angstrom resolutions. We demonstrate theoretically how it can be used to monitor conical intersection dynamics in molecules. Specific contributions to the signal are identified which vanish in the absence of vibronic coherence and offer a direct window into conical intersection paths. A special focus is on hybrid scattering from nuclei and electrons, a process that is unique to electron (rather than X-ray) diffraction and monitors the strongly coupled nuclear and electronic motions in the vicinity of conical intersections. Furthermore, an application is made to the cis to trans isomerization of azobenzene, computed with exact quantum dynamics wavepacket propagation in a reactive two-dimensional nuclear space.

Research Organization:
Univ. of California, Irvine, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
Grant/Contract Number:
SC0019484
OSTI ID:
1922848
Journal Information:
Journal of Chemical Theory and Computation, Journal Name: Journal of Chemical Theory and Computation Journal Issue: 2 Vol. 18; ISSN 1549-9618
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (35)

Enlightening Materials with Photoswitches journal January 2020
Ultrafast Electron Diffraction (UED): A New Development for the 4D Determination of Transient Molecular Structures journal June 2003
Molcas 8: New capabilities for multiconfigurational quantum chemical calculations across the periodic table : Molcas 8 journal November 2015
Density matrix averaged atomic natural orbital (ANO) basis sets for correlated molecular wave functions: I. First row atoms journal January 1990
Femtosecond photoisomerization of cis-azobenzene journal July 1997
Capturing Chemistry in Action with Electrons: Realization of Atomically Resolved Reaction Dynamics journal May 2017
Ab Initio Computation of Rotationally-Averaged Pump–Probe X-ray and Electron Diffraction Signals journal January 2019
Multidimensional Potential Energy Surfaces Resolved at the RASPT2 Level for Accurate Photoinduced Isomerization Dynamics of Azobenzene journal October 2019
A Red-Shifted, Fast-Relaxing Azobenzene Photoswitch for Visible Light Control of an Ionotropic Glutamate Receptor journal November 2013
Photoisomerization Dynamics and Pathways of trans - and cis -Azobenzene in Solution from Broadband Femtosecond Spectroscopies and Calculations journal July 2014
Three-dimensional view of ultrafast dynamics in photoexcited bacteriorhodopsin journal July 2019
Observation of the molecular response to light upon photoexcitation journal May 2020
The photochemical ring-opening of 1,3-cyclohexadiene imaged by ultrafast electron diffraction journal April 2019
Towards jitter-free ultrafast electron diffraction technology journal December 2019
Using azobenzene photocontrol to set proteins in motion journal December 2021
Ultrafast electron optics: Propagation dynamics of femtosecond electron packets journal August 2002
Molecular dynamics and spectra. I. Diatomic rotation and vibration journal May 1981
An accurate and efficient scheme for propagating the time dependent Schrödinger equation journal November 1984
Design of specially adapted reactive coordinates to economically compute potential and kinetic energy operators including geometry relaxation journal June 2016
Monitoring nonadiabatic avoided crossing dynamics in molecules by ultrafast X-ray diffraction journal September 2017
Ultrafast x-ray and electron scattering of free molecules: A comparative evaluation journal May 2020
Signatures of electronic and nuclear coherences in ultrafast molecular x-ray and electron diffraction journal January 2021
Determining the radial distribution function of water using electron scattering: A key to solution phase chemistry journal November 2020
Monitoring molecular nonadiabatic dynamics with femtosecond X-ray diffraction journal June 2018
Imaging conical intersection dynamics during azobenzene photoisomerization by ultrafast X-ray diffraction journal January 2021
Femtosecond electron diffraction: heralding the era of atomically resolved dynamics journal August 2011
Coherent and Incoherent Electron-Phonon Coupling in Graphite Observed with Radio-Frequency Compressed Ultrafast Electron Diffraction journal December 2014
X-Ray Sum Frequency Diffraction for Direct Imaging of Ultrafast Electron Dynamics journal June 2018
Spectroscopic and Structural Probing of Excited-State Molecular Dynamics with Time-Resolved Photoelectron Spectroscopy and Ultrafast Electron Diffraction journal April 2020
On the sensitivity of electron and X-ray scattering factors to valence charge distributions journal July 2005
Imaging CF 3 I conical intersection and photodissociation dynamics with ultrafast electron diffraction journal July 2018
Simultaneous observation of nuclear and electronic dynamics by ultrafast electron diffraction journal May 2020
Mapping Atomic Motions with Ultrabright Electrons: The Chemists' Gedanken Experiment Enters the Lab Frame journal April 2014
4d Ultrafast Electron Diffraction, Crystallography, and Microscopy journal May 2006
Femtosecond/Picosecond Time-Resolved Spectroscopy of trans - Azobenzene: Isomerization Mechanism Following S 2 (ππ*) ← S 0 Photoexcitation journal May 2002

Similar Records

Imaging conical intersection dynamics during azobenzene photoisomerization by ultrafast X-ray diffraction
Journal Article · 2021 · Proceedings of the National Academy of Sciences of the United States of America · OSTI ID:1759080

Nonadiabatic ab initio molecular dynamics of photoisomerization in bridged azobenzene
Journal Article · 2012 · Journal of Chemical Physics · OSTI ID:22099119

Nonadiabatic simulation study of photoisomerization of azobenzene: Detailed mechanism and load-resisting capacity
Journal Article · 2008 · Journal of Chemical Physics · OSTI ID:21254780