Two-dimensional confinement for generating thin single crystals for applications in time-resolved electron diffraction and spectroscopy: an intramolecular proton transfer study

Abstract

Thin single organic crystals (≤1 μm) with large area (≥100 × 100 μm2) are desirable to explore photoinduced processes using ultrafast spectroscopy and electron-diffraction. Here, we present a general method...

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

“…Understanding the ultrafast dynamics of proton transfer (PT) is a fundamental challenge in chemistry, given its crucial role in numerous chemical and biological processes, such as acid–base neutralization, fuel cell operation, and enzymatic reactions. − PT can occur in gas, liquid, and crystal phases, and both in the ground electronic states and excited states (known as excited-state intramolecular PT, ESIPT). Generally, understanding PT in condensed phases (liquid and solid) is more challenging than in the gas phase, owing to increased intermolecular interactions, solvent effects, structural constraints, and kinetic factors.…”

“…The potential energy surfaces (PESs) along the PT coordinate determine the possibility and rate of the reaction, influenced by various factors such as hydrogen bonding, Coulomb interactions, charge transfer interactions, van der Waals interactions, and ambient conditions . Recent studies have used femtosecond spectroscopy to investigate the ultrafast dynamics of PT and shed light on the interplay between electronic and nuclear degrees of freedom. − …”