Photochromism is defined as a reversible transformation of a chemical species between two
isomers having different absorption spectra induced in one or both directions by …

Ultrafast photochemical reactions in liquids occur on similar or shorter time scales compared
to the equilibration of the optically populated excited state. This equilibration involves the …

The ultrafast photoinduced ring-opening of 1, 3-cyclohexadiene constitutes a textbook
example of electrocyclic reactions in organic chemistry and a model for photobiological …

Molecular orbital framework is of central importance in chemistry. Often used by chemists
and physicists to gain insight into molecular properties, Hartree–Fock or Kohn–Sham …

With the recent advances in ultrabright electron and x-ray sources, it is now possible to
extend crystallography to the femtosecond time domain to literally light up atomic motions …

Femtosecond stimulated Raman spectroscopy (FSRS) is an ultrafast nonlinear optical
technique that provides vibrational structural information with high temporal (sub‐50 fs) …

One of the grand challenges in chemistry has been to directly observe atomic motions
during chemical processes. The depiction of the nuclear configurations in space-time to …

Correlated electron systems can undergo ultrafast photoinduced phase transitions involving
concerted transformations of electronic and lattice structure. Understanding these …

This review documents the development of high–bunch charge electron pulses with
sufficient combined spatiotemporal resolution and intensity to literally light up atomic …

The ability to resolve the dynamics of matter on its native temporal and spatial scales
constitutes a key challenge and convergent theme across chemistry, biology, and materials …