Ultrafast molecular movies: Probing chemical dynamics with femtosecond electron and X-ray diffraction

Q Wang, L Yun, J Yang - CCS Chemistry, 2024 - chinesechemsoc.org
Understanding the process of chemical reactions has always been a relentless pursuit for
chemists. The development of femtosecond pump-probe techniques since the 1980s has …

Advanced quantum and semiclassical methods for simulating photoinduced molecular dynamics and spectroscopy

S Faraji, D Picconi… - Wiley Interdisciplinary …, 2024 - Wiley Online Library
Molecular‐level understanding of photoinduced processes is critically important for
breakthroughs in transformative technologies utilizing light, ranging from photomedicine to …

Extending GPU-accelerated Gaussian integrals in the TeraChem software package to f type orbitals: Implementation and applications

Y Wang, D Hait, KG Johnson, OJ Fajen… - The Journal of …, 2024 - pubs.aip.org
The increasing availability of graphics processing units (GPUs) for scientific computing has
prompted interest in accelerating quantum chemical calculations through their use …

[HTML][HTML] Predicting the photodynamics of cyclobutanone triggered by a laser pulse at 200 nm and its MeV-UED signals—A trajectory surface hopping and XMS …

J Janoš, JP Figueira Nunes, D Hollas… - The Journal of …, 2024 - pubs.aip.org
This work is part of a prediction challenge that invited theoretical/computational chemists to
predict the photochemistry of cyclobutanone in the gas phase, excited at 200 nm by a laser …

Prediction of photodynamics of 200 nm excited cyclobutanone with linear response electronic structure and ab initio multiple spawning

D Hait, D Lahana, OJ Fajen, ASP Paz… - The Journal of …, 2024 - pubs.aip.org
Simulations of photochemical reaction dynamics have been a challenge to the theoretical
chemistry community for some time. In an effort to determine the predictive character of …

Chemical bond reorganization in intramolecular proton transfer revealed by ultrafast X-ray photoelectron spectroscopy

Y Gu, H Yong, B Gu, S Mukamel - Proceedings of the …, 2024 - National Acad Sciences
Time-resolved X-ray photoelectron spectroscopy (TR-XPS) is used in a simulation study to
monitor the excited state intramolecular proton transfer between oxygen and nitrogen atoms …

Ultrafast photochemistry and electron diffraction for cyclobutanone in the S2 state: Surface hopping with time-dependent density functional theory

ER Miller, SJ Hoehn, A Kumar, D Jiang… - arXiv preprint arXiv …, 2024 - arxiv.org
We simulate the photodynamics of gas-phase cyclobutanone excited to the S $ _2 $ state
using fewest switches surface hopping (FSSH) dynamics powered by time-dependent …

Investigating dissociation pathways of nitrobenzene via mega-electron-volt ultrafast electron diffraction

K Hegazy, J Cryan, R Li, MF Lin, B Moore… - arXiv preprint arXiv …, 2023 - arxiv.org
As the simplest nitroaromatic compound, nitrobenzene is an interesting model system to
explore the rich photochemistry of nitroaromatic compounds. Previous measurements of …

Mapping Hydrogen Positions along the Proton Transfer Pathway in an Organic Crystal by Computational X-ray Spectra

G Ge, JR Zhang, SY Wang, M Wei, Y Ji… - The Journal of …, 2024 - ACS Publications
Understanding proton transfer (PT) dynamics in condensed phases is crucial in chemistry.
We computed a 2D map of N 1s X-ray photoelectron/absorption spectroscopy (XPS/XAS) for …

Self-Heterodyne Diffractive Imaging of Ultrafast Electron Dynamics Monitored by Single-Electron Pulses

S Sun, H Yong, VY Chernyak, S Mukamel - Physical Review Letters, 2024 - APS
The direct imaging of time-evolving molecular charge densities on atomistic scale and at
femtosecond resolution has long been an elusive task. In this theoretical study, we propose …