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Direct Imaging of Laser-driven Ultrafast Molecular Rotation

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Published on: February 4, 2017

Differentiating Three-Dimensional Molecular Structures Using Laser-Induced Coulomb Explosion Imaging.

Huynh Van Sa Lam¹, Anbu Selvam Venkatachalam¹, Surjendu Bhattacharyya¹

¹James R. Macdonald Laboratory, Kansas State University, Manhattan, Kansas 66506, USA.

Physical Review Letters

|April 5, 2024

Summary

This summary is machine-generated.

Coulomb explosion imaging (CEI) using tabletop lasers can differentiate 3D molecular structures. This technique tracks atomic motion, offering insights into ultrafast reactions like ring-opening.

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Area of Science:

Physical Chemistry
Chemical Physics
Molecular Dynamics

Background:

Coulomb explosion imaging (CEI) with X-ray free-electron lasers (XFELs) excels at analyzing planar ring molecules.
Previous CEI studies primarily focused on gas-phase planar molecules.

Purpose of the Study:

To explore the potential of tabletop laser-driven CEI for structural analysis.
To extend CEI capabilities to differentiate three-dimensional (3D) molecular structures.
To investigate CEI for distinguishing between planar and nonplanar organic molecules, relevant to ring-opening reactions.

Main Methods:

Utilized static Coulomb explosion imaging (CEI) driven by a tabletop laser.
Studied CEI patterns of planar and nonplanar organic molecules.
Employed classical Coulomb explosion simulations for pattern reproduction.

Main Results:

Each molecule displayed a unique, localized pattern in 3D fragment-ion momentum space.
CEI patterns provided direct molecular structural information.
Simulations qualitatively reproduced the observed CEI patterns.

Conclusions:

Laser-induced CEI is a robust method for differentiating 3D structures of organic ring and chain molecules.
CEI shows promise for tracking ultrafast structural dynamics, such as in ring-opening reactions, via atomistic motion.
This technique offers a pathway for detailed studies of molecular transformations.